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BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230615T130000
DTEND;TZID=Europe/Berlin:20230615T140000
DTSTAMP:20260417T212728
CREATED:20230612T182534Z
LAST-MODIFIED:20230612T182534Z
UID:4219-1686834000-1686837600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: James Matthews
DESCRIPTION:Ultrahigh energy cosmic rays: an origin story\nUnderstanding how ultrahigh energy cosmic rays (UHECRs) reach energies in excess of 1e20 eV stretches particle acceleration physics to its very limits. In this talk\, I will discuss how such energies can be reached\, using general arguments that can often be derived on the back of an envelope. I will review possible particle acceleration mechanisms\, with special attention paid to shock acceleration. Informed by the arguments derived in the talk\, and with insights from Galactic CR acceleration in supernova remnants\, I will then discuss which classes of astrophysical sources might be UHECR sources\, including my own (biased) perspective; generally\, I favour radio galaxies\, GRB afterglows and other sources which are not too compact and dissipate prodigious amounts of energy on large scales. Aided by hydrodynamic simulations\, I will show that shocks in the backflows in radio galaxies are good accelerators of UHECRs\, then present simulations in which the jet flickers and explore the impact on particle acceleration. I will explore a scenario in which a significant fraction of UHECRs originate from local radio galaxies like Centaurus A and Fornax A\, arguing that they can explain the observed UHECR anisotropies. Finally\, I will highlight the importance of variability in these potential UHECR sources\, and explore the intiguing possibility that the UHECR arrival directions are partly a result of “UHECR echoes” or “reverberation” from magnetic structures in the local Universe.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-06-15-james-matthews/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20230720T124500
DTEND;TZID=Europe/Berlin:20230720T134500
DTSTAMP:20260417T212728
CREATED:20230403T195959Z
LAST-MODIFIED:20230922T175223Z
UID:4167-1689857100-1689860700@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Benedetta Ciardi
DESCRIPTION:Modeling and Observations of Cosmic Reionization\nIn this talk I will introduce the topic of intergalactic medium reionization\, its importance in the context of structure formation and how it is modeled from a theoretical point of view. I will then discuss how observations of the 21cm line from neutral hydrogen can be used to constrain the reionization process and present the latest LOFAR data in this respect.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-07-20-benedetta-ciardi/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231019T130000
DTEND;TZID=Europe/Berlin:20231019T140000
DTSTAMP:20260417T212728
CREATED:20231017T124139Z
LAST-MODIFIED:20231017T124245Z
UID:4798-1697720400-1697724000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Christoph Weniger
DESCRIPTION:Low-cost high-fidelity data analysis with simulation-based inference\nThe increasing volume and sophistication of astrophysical and cosmological data challenge traditional analysis methods\, which often struggle with high-dimensional models and complex observations as seen for instance in gravitational waves\, supernova cosmology\, and gamma-ray data. Highlighting these limitations\, this talk explores how deep learning and simulation-based inference can offer scalable and effective solutions. Despite promising advances\, there are substantial challenges to fully realize the potential of these technologies. This talk will conclude with the crucial next steps in incorporating these techniques more effectively into astrophysical and cosmological data analysis.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-10-19-christoph-weniger/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231026T130000
DTEND;TZID=Europe/Berlin:20231026T140000
DTSTAMP:20260417T212728
CREATED:20231017T124139Z
LAST-MODIFIED:20231023T112219Z
UID:4799-1698325200-1698328800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Jamie Holder
DESCRIPTION:Space Lasers and Aliens: Searching for optical transients with Gamma-ray Light Buckets\nImaging atmospheric Cherenkov telescopes (IACTs) are among the largest and fastest optical telescopes in the world\, ideally suited to searching for nanosecond-timescale optical transients. These could be astrophysical in nature\, or even associated with signals transmitted by extra-terrestrial civilizations. I will describe the methods used to extract such signals from data recorded by the VERITAS telescopes. A definitive test of these techniques is provided by measurement of a LIDAR on board the CALIPSO satellite\, which also holds promise as a unique calibration device for IACTs. I will also discuss the potential of the converse approach – using telescopes designed for SETI to do gamma-ray astronomy.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-10-26-jamie-holder/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231116T130000
DTEND;TZID=Europe/Berlin:20231116T140000
DTSTAMP:20260417T212728
CREATED:20231017T124139Z
LAST-MODIFIED:20231116T170957Z
UID:4800-1700139600-1700143200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Denys Malyshev
DESCRIPTION:Search for primordial black hole dark matter with X-ray satellites and prospects for future missions\nUltralight primordial black holes (PBHs) in the mass range of 1016 – 1022 g are allowed by current observations to constitute a significant fraction\, if not all\, of the dark matter in the Universe. In this work\, we present limits on ultralight\, nonrotating PBHs which arise from the nondetection of the Hawking radiation signals from such objects in the keV – MeV energy band. Namely\, we consider observations from the current-generation missions XMM-Newton and INTEGRAL/SPI and discuss the observational perspectives of the future missions Athena\, eXTP\, and THESEUS for PBH searches. Based on 3.4 Msec total exposure time of XMM-Newton observations of Draco dwarf spheroidal galaxy\, we conclude that PBH with masses ≲ 1016 g cannot make all dark matter at 95% confidence level. Our ON-OFF-type analysis of >100 Msec of INTEGRAL/SPI data on the Milky Way halo puts significantly stronger constraints. Only ≲ 10 % of dark matter can be presented by PBHs with masses ≲ 3 × 1016 g while the majority of dark matter cannot be represented by PBHs lighter than 7 × 1016 g at 95% confidence level. We discuss the strong impact of systematic uncertainty related to the variations of instrumental and astrophysical INTEGRAL/SPI background on the derived results and estimate its level. We also show that future large field-of-view missions such as THESEUS /X-GIS will be able to improve the constraints by a factor of 10 – 100 depending on the level of control of the systematics of these instruments. \nDownload talk slides
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-11-16-denys-malyshev/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231123T130000
DTEND;TZID=Europe/Berlin:20231123T140000
DTSTAMP:20260417T212728
CREATED:20231017T124140Z
LAST-MODIFIED:20231117T105916Z
UID:4801-1700744400-1700748000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Esra Bulbul
DESCRIPTION:First Results from the eROSITA All-Sky Survey: An Open Window to Precision Cosmology\nClusters of galaxies trace the highest peaks in the cosmic density field and offer an independent and powerful probe of the growth of structure and cosmology. Locating clusters through well-planned multi-wavelength surveys is crucial for testing gravitational theory and cosmology. Successfully launched in July 2019\, eROSITA\, the German-built telescope array operating between 0.2-8 keV on board the Russian-German Spectrum-RG (SRG) mission\, delivers the largest catalogs of clusters of galaxies from its All-Sky Surveys. The first eROSITA all-sky survey\, yielding more than 10\,000 confirmed clusters of galaxies\, constrains the cosmological parameters from cluster mass function and cluster-clustering when combined with the overlapping DES\, HSC\, and KIDS weak lensing surveys. I will summarise the first cluster science\, large scale structure\, and cosmology results from eROSITA’s first All-Sky Survey and provide an outlook for future deeper surveys.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-11-23-esra-bulbul/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231130T130000
DTEND;TZID=Europe/Berlin:20231130T140000
DTSTAMP:20260417T212728
CREATED:20231017T124140Z
LAST-MODIFIED:20231116T161738Z
UID:4802-1701349200-1701352800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Heinrich Päs
DESCRIPTION:Neutrinos\, Quantum Gravity and the Big Questions – New Ideas for New Data\nNeutrinos are perfect probes of quantum gravity. The particles’ weak interactions allow to preserve quantum coherence for very long timespans\, and neutrino telescopes have started to collect data of neutrinos at extreme energies that have travelled extra-galactic distances. Moreover\, the expected breaking of global symmetries such as lepton number in quantum gravity may induce neutrino Majorana masses. The talk discusses how new ideas about quantum gravity could imply exotic properties or phenomena in the neutrino sector\, such as altered dispersion relations\, quantum-gravitational decoherence\, or UV/IR mixing that may be linked to the big open questions of particle physics and cosmology like the nature of dark matter or the electroweak hierarchy problem.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-11-30-heinrich-pas/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231205T130000
DTEND;TZID=Europe/Berlin:20231205T140000
DTSTAMP:20260417T212728
CREATED:20231028T150851Z
LAST-MODIFIED:20231123T125351Z
UID:4940-1701781200-1701784800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Carlos Arguelles
DESCRIPTION:News from the IceCube Neutrino Observatory and Related Phenomenology\nIt has been ten years since IceCube\, a neutrino detector embedded in the Antarctic glacier\, has detected high-energy astrophysical neutrinos. In this informal talk\, I will report on the latest results from IceCube and point out opportunities for searches for new physics. In particular\, I will describe the recent observation of NGC 1068 and the detection of our galaxy in neutrinos. I will present recent proposals to search for new physics with these sources. Finally\, I will provide an update on searches for light sterile neutrinos with high-energy atmospheric neutrinos.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-12-05-carlos-arguelles/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231214T130000
DTEND;TZID=Europe/Berlin:20231214T140000
DTSTAMP:20260417T212728
CREATED:20231017T124142Z
LAST-MODIFIED:20231208T105138Z
UID:4804-1702558800-1702562400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Cosmio Nigro
DESCRIPTION:Community\, Standardisation\, and Reproducibility: does open-source software help advancing high-energy astrophysics?\nIn this talk\, I will discuss how high-energy astrophysics\, and gamma-ray astronomy in particular\, are being transformed by several community-based efforts to develop standardised data and open-source software both for statistical analysis and physical modelling. \nIn the first part of the talk\, I will focus my attention on the Data Formats for Gamma-ray Astronomy (GADF) initiative\, which proposes a standardised format for gamma-ray astronomical data. This format has been successfully adopted by the current generation of gamma-ray instruments; making\, for the first time\, their data analysable with open-source science tools such as Gammapy. I will present some examples of technical results achieved by adopting these standardised data and tools\, and argue for their potential in facilitating future multi-instruments analyses. \nIn the second part of the talk\, I will discuss the endeavor to develop open-source tools for modelling the emission of astrophysical sources\, which are effectively opening the possibility to perform physical interpretation to the community\, a task previously performed by a few groups with proprietary software. \nI will conclude by discussing the potential impact this new philosophy of open-source development can have on our increasingly digital science.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2023-12-14-cosmio-nigro/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240111T130000
DTEND;TZID=Europe/Berlin:20240111T140000
DTSTAMP:20260417T212728
CREATED:20231017T124142Z
LAST-MODIFIED:20240107T214507Z
UID:4803-1704978000-1704981600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Lucy Oswald
DESCRIPTION:Pulsar polarization: explanations and applications\nPulsar radio emission\, and particularly its polarization\, is a key probe of neutron star physics. This\, in turn\, means that we can use it to advance searches for gravitational waves and to map out the invisible structures of the galaxy. However\, new and improved observations show that the conventional model of pulsar polarization behaviour does not explain everything we see. \nIn this talk\, I will describe how impressive new broad-band observations reveal key relationships between polarization features in pulsar radio emission\, and how this is related to neutron star physics. I will explain how the “partial-coherence model” accounts for these observational results\, with examples of individual and collective pulsar behaviours. Finally\, I will look to the future as we move towards the arrival of the SKA telescopes. I will discuss how large-scale pulsar surveys will advance our ability to use pulsars as accurate tools to probe high energy physics and measure gravitational waves.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-01-11-lucy-oswald/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240117T150000
DTEND;TZID=Europe/Berlin:20240117T160000
DTSTAMP:20260417T212728
CREATED:20240109T094040Z
LAST-MODIFIED:20240109T094040Z
UID:5052-1705503600-1705507200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Florian Marquardt
DESCRIPTION:Machine Learning: from Quantum Technologies to Neuromorphic Devices\n 
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-01-17-florian-marquardt/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240118T130000
DTEND;TZID=Europe/Berlin:20240118T140000
DTSTAMP:20260417T212728
CREATED:20231025T113705Z
LAST-MODIFIED:20240116T205231Z
UID:4918-1705582800-1705586400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Mirco Huennefeld
DESCRIPTION:Evidence for high-energy neutrinos from the Galactic plane\nThe Milky Way\, our home galaxy\, is visible to the eye as a faint band of light in the night sky. This emission from the Galactic plane extends over a wide range of the electromagnetic spectrum\, from radio to gamma rays. A fraction of the gamma-ray emission is theorized to arise from cosmic rays interacting with the interstellar medium through the decay of neutral pions. The presence of this diffuse gamma-ray emission implies the existence of Galactic neutrinos produced in associated processes. Recently\, strong evidence for the emission of high-energy neutrinos in the Galactic plane was reported by IceCube\, a neutrino detector instrumenting a cubic kilometer of glacial ice at the South Pole. This observation\, enabled by novel tools based on deep learning\, thus opens a new window to study the high-energy universe\, allowing us to further probe the properties of our own Galaxy and the origin of cosmic rays. \nIn this contribution\, I will highlight the recent observation by IceCube and the technical advances that made it possible\, in addition to providing some future prospects.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-01-18-mirco-huennefeld/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240125T130000
DTEND;TZID=Europe/Berlin:20240125T140000
DTSTAMP:20260417T212728
CREATED:20231017T124142Z
LAST-MODIFIED:20240102T175122Z
UID:4805-1706187600-1706191200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Gabrijela Zaharijas
DESCRIPTION:Looking for dark matter in gamma rays – can machine learning help?\nWe live in a ‘golden’ time for studies of high-energy (HE) astrophysics as a series of satellite and ground based telescopes currently provide high-precision data\, critical to answer the century old questions on the origin of cosmic rays and physics at the heart of most energetic accelerators in the Universe. This progress has also important implications for fundamental physics\, providing a test on the nature of dark matter (DM) particles\, one of the long-lasting problems in contemporary physics. \nAnalysis of these rich data sets in a comprehensive way\, inducive to identification of telltale signs of new astro- and fundamental physics\, however\, presents a significant challenge. As one of the most promising avenues\, the machine learning (ML) techniques have been developed and embraced in a number of fields that share availability and related challenges of large data sets. In HE astrophysics however\, in particular in the subfield related to cosmic rays and their interactions in the Galaxy\, as well as in indirect DM searches\, these techniques were rarely taken advantage of\, due to particular data analysis challenges (in particular\, limited training samples). \nIn this talk I will discuss the application of ML techniques to gamma-ray Fermi-LAT data on two concrete scientific challenges: determination of the nature of the Galactic center excess and detection and classification of (faint) gamma-ray sources\, both of high relevance in both\, astro- and fundamental physics. Extension and challenges of such applications to next generation telescopes (e.g. the CTA) will also be outlined.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-01-25-gabrijela-zaharijas/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240201T133000
DTEND;TZID=Europe/Berlin:20240201T143000
DTSTAMP:20260417T212728
CREATED:20231218T150301Z
LAST-MODIFIED:20240201T091001Z
UID:5037-1706794200-1706797800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Malte Göttsche
DESCRIPTION:Civilian and military use of nuclear technology\nTo exploit nuclear technology for civilian purposes\, in particular energy production\, a variety of facilities – a nuclear fuel cycle – is necessary\, comprising reactors and uranium enrichment plants among others. These same facilities\, however\, produce the fissile materials that are required to build nuclear weapons: plutonium and highly enriched uranium. Thus\, nuclear fuel cycle facilities are inherently dual-use. The civilian or military nature of a nuclear program can only be assessed by verifying nuclear programs. This is the task of the International Atomic Energy Agency\, which conducts on-site inspections. The development of verification technologies is a topic of on-going research. Besides an introduction into the nuclear fuel cycle and its uses\, this talk will address one particular verification approach under development which intersects with particle physics: antineutrino monitoring to verify reactors operations.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-02-01-malte-gottsche/
LOCATION:Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240311T140000
DTEND;TZID=Europe/Berlin:20240311T150000
DTSTAMP:20260417T212728
CREATED:20240229T083721Z
LAST-MODIFIED:20240229T193652Z
UID:5093-1710165600-1710169200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Ellis Owen
DESCRIPTION:Exploring the signatures of cosmic ray feedback effects in galaxy ecosystems\nCosmic rays go hand-in-hand with violent and energetic astrophysical conditions. They are an active agent within galactic and circumgalactic ecosystems\, where they can deposit energy and momentum\, modify the circulation of baryons\, and even have the potential to regulate star-formation on local and galactic scales. Their influence in galaxies can be probed using observable signatures across the electromagnetic spectrum\, with high energy radiation being particularly important to determine their energy budget\, feedback power and hydrodynamic effects. In this talk\, I will discuss some of the astrophysical impacts hadronic and leptonic cosmic rays can have in and around galaxies\, how their influence can be probed using signatures in X-rays and gamma-rays\, and the opportunities soon to open-up that will allow us to map-out the multi-scale effects of cosmic rays in galaxies near and far.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-ellis-owen-11-03-24/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240425T130000
DTEND;TZID=Europe/Berlin:20240425T140000
DTSTAMP:20260417T212728
CREATED:20240419T113417Z
LAST-MODIFIED:20240419T113417Z
UID:5151-1714050000-1714053600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Atreya Acharyya
DESCRIPTION:Recent Highlights from the VERITAS AGN Program\nVERITAS is one of the world’s most sensitive detectors of astrophysical very high energy (VHE; E > 100 GeV) gamma rays. This observatory began full-scale operations in 2007\, and more than 8\,000 hours of its good-weather observations have been targeted on active galactic nuclei (AGN). Approximately ~250 AGN were observed with VERITAS\, many of these as part of a comprehensive program to discover new VHE AGN. VERITAS spectral and variability measurements\, and accompanying broadband observations\, are key probes of the underlying jet-powered processes in AGN. Recent scientific highlights from the VERITAS AGN discovery program will be presented.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-04-25-atreya-acharyya/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240508T120000
DTEND;TZID=Europe/Berlin:20240508T130000
DTSTAMP:20260417T212728
CREATED:20240506T120026Z
LAST-MODIFIED:20240506T120026Z
UID:5176-1715169600-1715173200@ecap.nat.fau.de
SUMMARY:Physics Department Colloquium: Yuri Y. Kovalev
DESCRIPTION:Multi-messenger Lighthouses of the Universe: The many extremes of Active Galactic Nuclei\nAbstract: Active galactic nuclei (AGN) make the most significant contribution to the overall energy balance in the Universe in all electromagnetic bands not dominated by the cosmic microwave background. A good understanding of physical processes and phenomena driving this contribution is paramount for addressing the key challenges in astrophysics and cosmology\, including accretion onto black holes\, electromagnetic fields\, and shock waves in relativistic plasma.\nThese factors can be best studied with comprehensive programs combining dedicated multi-band and multi-messenger measurements with ultra-high angular resolution imaging in the radio regime enabled by the technique of very long baseline interferometry (VLBI). \nIn this talk I will discuss results from several such studies which we have conducted recently\, targeting different aspects of AGN physics.\nThe discovery of extreme brightness in blazars\, made with space VLBI observations\, has set new limits on the very high rates of energy release in plasma.\nThe mounting observational indications for extragalactic neutrino production in blazar-type AGN now begin to deliver key understanding about the physics of proton\nacceleration in blazars\, either nearby central supermassive black holes or in plasma shocks embedded in the relativistic jets. Deriving from these results\,\nthe continued improvements of sensitivity and fidelity of VLBI observations\, and the expected advent of a true era of multi-messenger astronomy\,\nI will conclude by outlining several fundamental directions for studying the physical nature of AGN which will become feasible in the coming years.
URL:https://ecap.nat.fau.de/index.php/event/physics-department-colloquium-yuri-y-kovalev/
LOCATION:Hörsaalgebäude Physikum\, Staudtstr. 5\, Erlangen\, 91058\, Germany
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240516T123000
DTEND;TZID=Europe/Berlin:20240516T133000
DTSTAMP:20260417T212728
CREATED:20240502T111424Z
LAST-MODIFIED:20240514T130742Z
UID:5164-1715862600-1715866200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Katharina Breininger
DESCRIPTION:Improving our understanding of machine learning robustness – in microscopy and beyond\nA central goal when applying machine learning in the biomedical research and medical imaging is to answer relevant interdisciplinary questions robustly and reliably across various setups and ideally modalities; however\, this is challenged by different imaging systems\, differences between a laboratory setting and the real world as well as a multitude of other factors. This talk will explore the challenge of domain generalization in digital pathology\, microscopy\, and beyond. Specifically\, we will discuss the Mitosis Domain Generalization (MIDOG) Challenge that took place at the International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI) in 2021 and 2022 as one example how we can work toward more robust machine learning approaches. Furthermore\, we will explore how we can potentially transfer the corresponding machine learning insights from imaging very tiny structures close-by to structures far\, far away.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-05-16-katharina-breininger/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240523T130000
DTEND;TZID=Europe/Berlin:20240523T140000
DTSTAMP:20260417T212728
CREATED:20240514T130551Z
LAST-MODIFIED:20240514T130551Z
UID:5186-1716469200-1716472800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Lucy Fortson
DESCRIPTION:Muon Hunting with the Crowd: Combining Humans and Machines to Solve Big Data Problems\nIn this presentation\, I will describe the Zooniverse.org citizen science platform as a tool to gather labels from over 2.7 million dedicated volunteers worldwide who are motivated to participate in scientific research. Hundreds of research teams now turn to Zooniverse for crowdsourcing tasks such as image classification and annotation\, which provide the large labeled data sets needed for optimal training of machine algorithms. I will demonstrate the ease with which a project can be developed with the Zooniverse Project Builder tools and describe the infrastructure available for integrating machine learning with Zooniverse including sophisticated active learning techniques. I will provide examples from across several projects in astronomy and astroparticle physics\, with a focus on the Muon Hunter project used to gather millions of labels to train a machine algorithm for an imaging air Cherenkov telescope calibration pipeline. I will finish with a look at how we are working to combine human and machine intelligence to probe large data sets\, including those from Cherenkov telescopes\, for scientifically interesting anomalous events. \n 
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-05-23-lucy-fortson/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240606T130000
DTEND;TZID=Europe/Berlin:20240606T140000
DTSTAMP:20260417T212728
CREATED:20240502T160115Z
LAST-MODIFIED:20240502T160115Z
UID:5171-1717678800-1717682400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Ekaterina Makarenko
DESCRIPTION:Thermal X-ray emission from supernova remnants in 3D (M)HD simulations\nEvery supernova (SN) injects around 10^51 ergs into the interstellar medium (ISM)\, shaping the ISM’s chemical\, thermal\, and dynamic evolution. Around 70% of the injected energy is subsequently lost by radiative cooling. However\, the fate of the emitted cooling photons is usually neglected in simulations as the surrounding ISM is treated as optically thin. This makes high-resolution 3D simulations quite unphysical. The growing ability of X-ray spectroscopy allows observations of SN remnants (SNRs) to define pixel-by-pixel based parameters (such as plasma temperature\, ionisation state\, and abundance of different elements). We therefore urgently need more realistic simulations of SNRs. \nIn this talk\, I will present state-of-the-art (magneto-)hydrodynamic simulations of SN explosions using the FLASH code\, which include radiative cooling from the SN event. Radiative cooling is calculated on-the-fly and is fully consistent with the code’s radiative transfer\, physics\, and chemistry modules. Therefore\, we created synthetic maps of the simulated SNR in several X-ray energy bands (e.g. Chandra energy bands in the range 0.1-10 keV) as well as for selected lines. These synthetic X-ray maps provide unique information about the physics of shock/cloud interactions\, the general morphology of the remnants\, as well as a better comparison (and prediction) for SNR observations.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-ekaterina-makarenko-06-06-2024/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240607T130000
DTEND;TZID=Europe/Berlin:20240607T140000
DTSTAMP:20260417T212728
CREATED:20240528T140117Z
LAST-MODIFIED:20240528T140117Z
UID:5204-1717765200-1717768800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Philipp Frank
DESCRIPTION:Signal reconstruction for fields using probabilistic forward modeling\nMany inference tasks in observational astronomy take the form of reconstruction problems where the underlying quantities of interest are fields (functions of space\, time and/or frequency) that have to be recovered from noisy and incomplete observational data. These problems are in general ill-posed\, as many different field configurations may be consistent with the observed data\, and therefore their solutions are inherently of probabilistic nature. Forward modeling\, that is combining an accurate description of the observing instrument’s response to a field configuration occurring in nature with the rules of probability & information theory provides a robust and scalable framework to solve such problems. I will give a brief overview on the involved theoretical concepts and numerical techniques employed to do so in practice\, and show a selection of applications to real-world astrophysical data-analysis problems ranging from results in the radio- up to the gamma-ray-regime.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-06-07-philipp-frank/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240627T130000
DTEND;TZID=Europe/Berlin:20240627T140000
DTSTAMP:20260417T212728
CREATED:20240502T111528Z
LAST-MODIFIED:20240626T170421Z
UID:5166-1719493200-1719496800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Martin Mayer
DESCRIPTION:Rotation-powered pulsars and their nebulae – the eROSITA view\nSRG/eROSITA is a soft X-ray (0.2 – 10 keV) telescope which has carried out the deepest X-ray all-sky survey to date. In this talk\, I will present how the eROSITA data can be used to study rotation-powered pulsars and their pulsar wind nebulae\, exemplified by two projects: \nFirstly\, the surveying power of eROSITA has allowed us to carry out a systematic search for new high-energy pulsars through a cross-match with gamma-ray sources detected by Fermi-LAT. The resulting candidate list is expected to yield detections of several tens of new pulsars\, and can ideally be followed up by looking for signatures of pulsed radio emission\, or orbitally modulated optical emission from a binary companion\, at the candidate positions. \nSecondly\, eROSITA’s sensitivity has enabled us to study the X-ray synchrotron emission of Vela X\, the wind nebula of the Vela pulsar\, at unprecedented detail. This study led to the discovery of an extremely extended nonthermally emitting component\, reaching radii up to 15 pc from the Vela pulsar. Its large size can possibly be explained through particle transport by diffusion\, akin to the halos discovered around older pulsars in gamma-rays.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-06-27-martin-mayer/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240912T130000
DTEND;TZID=Europe/Berlin:20240912T140000
DTSTAMP:20260417T212728
CREATED:20240910T223229Z
LAST-MODIFIED:20240910T223229Z
UID:5306-1726146000-1726149600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Christopher Burger-Scheidlin
DESCRIPTION:Intricacies of searching for supernova remnants at (very) high energies off the Galactic plane\nSupernova remnants (SNRs) have traditionally been considered prime candidates for the acceleration of particles to high energies and to thus significantly contribute to the Galactic cosmic ray (CR) density. Most of them are first seen at radio wavelengths\, around 10% are subsequently also detected at γ-ray energies. Current-generation radio surveys\, such as the EMU survey with ASKAP\, are revealing an increasing number of low-surface-brightness radio SNRs at high Galactic latitudes. We are searching for high-energy counterparts\, which can provide important insights into understanding cosmic ray physics and constraining theories of CR acceleration and escape. These objects expanding in low-density media probe unperturbed environments that complement the population of (very-)high-energy-emitting SNRs in the Galactic plane.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-09-12-christopher-burger-scheidlin/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241026T150000
DTEND;TZID=Europe/Berlin:20241026T235900
DTSTAMP:20260417T212728
CREATED:20240831T081800Z
LAST-MODIFIED:20241018T130706Z
UID:5297-1729954800-1729987140@ecap.nat.fau.de
SUMMARY:Tag der offenen Tür der Dr. Karl Remeis-Sternwarte
DESCRIPTION:Wir laden ein zum: \nTag der offenen Tür der Dr. Karl Remeis-Sternwarte Bamberg \nAstronomisches Institut der Friedrich-Alexander Universität Erlangen-Nürnberg \nSamstag\, 26. Oktober 2024 von 15 – 24 Uhr \nProgramm: \n\nKinderprogramm (15-19 Uhr)\nKurzvorträge zu jeder vollen Stunde\nSonnen- und Himmelsbeobachtung\nRundgang durch die historische Sammlung\nTombola\n\nVortragsprogramm: \n\n\n\nVortragsthema\nVortragender\nUhrzeit\n\n\n\n\n135 Jahre Dr. Remeis-Sternwarte: Forschung und Lehre\nProf. Dr. Ulrich Heber\n16:00 Uhr\n\n\nExplosion in unserer Nachbarschaft – Supernova 1987A\nDr. Martin Mayer\n17:00 Uhr\n\n\nExpedition zum Schwarzen Loch\nDr. Thomas Dauser\n18:00 Uhr\n\n\nDie unermessliche Größe des Universums\nM.Sc. Roman Laktionov\n19:00 Uhr\n\n\nNeutronensterne\nDr. Ingo Kreykenbohm\n20:00 Uhr\n\n\nExpedition zum Schwarzen Loch (Wiederholung)\nDr. Thomas Dauser\n21:00 Uhr\n\n\nDer Himmel im Roentgenlicht\nProf. Dr. Jörn Wilms\n22:00 Uhr\n\n\n\n\n\n\n\nPoster: OpenDay_SternwarteBamberg_2024
URL:https://ecap.nat.fau.de/index.php/event/tag-der-offenen-tur-der-dr-karl-remeis-sternwarte/
LOCATION:Dr. Karl Remeis-Sternwarte\, Sternwartstr. 7 96049 Bamberg\, Sternwartstr. 7\, Bamberg\, Bavaria\, 96049\, Germany
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241031T130000
DTEND;TZID=Europe/Berlin:20241031T140000
DTSTAMP:20260417T212728
CREATED:20241002T130944Z
LAST-MODIFIED:20241014T122722Z
UID:5328-1730379600-1730383200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Jonas Neuser
DESCRIPTION:Black hole evaporation and quantum gravity\nHawking’s seminal result\, that black holes behave as black bodies with a non-vanishing temperature\, suggests that black holes should evaporate. However\, Hawking’s derivation is incomplete as it neglects the backreaction between radiation and geometry. Including it requires to incorporate quantum gravity. This talk focuses on the description of the conceptual challenges associated with black hole evaporation and sketches a recent proposal designed for meeting them. The intention is to eventually derive quantum gravity triggered deviations from Hawking’s evaporation formula and to convert them into measurable data.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-10-31-jonas-neuser/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241114T130000
DTEND;TZID=Europe/Berlin:20241114T140000
DTSTAMP:20260417T212728
CREATED:20241105T150153Z
LAST-MODIFIED:20241111T134229Z
UID:5359-1731589200-1731592800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Olivier Hainaut
DESCRIPTION:Satellite Constellations & Astronomy: What is the problem? What are we doing about it?\nIn recent years\, large satellite constellations have been launched into low-Earth orbit to provide low-latency\, global communication coverage. As a result\, the number of satellites in orbit has surged from approximately 2\,500 to over 10\,000\, raising concerns about the sustainability of this endeavor and its impact on astronomical observations and the night sky. \nI will discuss the current situation\, the effects of key constellation parameters (number of satellites\, altitude\, inclination\, satellite size\, etc.)\, and the impact on astronomical observations. I will also explore various mitigation methods. While this talk primarily focuses on astronomy\, I will briefly touch on non-astronomical aspects. \nBackground information: https://www.eso.org/~ohainaut/satellites/
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-11-14-olivier-hainaut/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241205T130000
DTEND;TZID=Europe/Berlin:20241205T140000
DTSTAMP:20260417T212728
CREATED:20241105T150605Z
LAST-MODIFIED:20241205T111738Z
UID:5364-1733403600-1733407200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Eli Kasai
DESCRIPTION:Optical spectroscopy and imaging of blazars for the Cherenkov Telescope Array Observatory\nBlazars are the brightest persistent sources in the high-energy and very-high-energy (VHE) gamma-ray sky. Because their UV/optical radiation is often dominated by non-thermal\, and\, in the case of BL Lacs\, featureless continuum radiation\, the determination of their redshift is extremely difficult. Only about 50% of gamma-ray blazars have a firm measurement of their redshift. This strongly reduces the precision in the modelling of their VHE emission\, involving the absorption due to the extragalactic background light\, which is dependent on redshift. Furthermore\, the effects on their radiation of proposed physics beyond the Standard Model such as Lorentz Invariance Violation and Axion-Like Particles cannot be reliably investigated. During the Cherenkov Telescope Array Observatory (CTAO) operations\, several hundreds of new blazars will be detected\, most of them without redshift. In order to mitigate this condition\, we devised an optical observing campaign. Likely targets were selected through simulations of CTAO observations using the Fermi-LAT 3FHL catalog as a starting point. Our campaign\, started in 2019\, has been recognized as necessary support for the AGN Key Science Project of the CTAO. It involves deep observations using\, among others\, 10-m class telescopes such as Keck\, SALT\, GTC and the VLT. In this talk\, I will present the status of our campaign\, its future developments and other activities we are pursuing.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-12-05-eli-kasai/
LOCATION:Physikum\, Hörsaal HF\, Staudtstr. 5\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241212T130000
DTEND;TZID=Europe/Berlin:20241212T140000
DTSTAMP:20260417T212728
CREATED:20241105T150757Z
LAST-MODIFIED:20241125T142221Z
UID:5366-1734008400-1734012000@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Katarzyna Nowak
DESCRIPTION:Finding evidence for self-enrichment and supermassive stars in forming globular clusters\nSelf-enrichment is one of the leading explanations for chemical anomalies in globular clusters. In this scenario\, a polluter star enriches a forming cluster with its yields\, likely ejecting radioactive 26Al into its surroundings. Young massive star clusters\, as potential progenitors of globular clusters\, provide a valuable setting to investigate self-enrichment processes and assess the role of supermassive stars (>1000 M)\, which are considered likely polluters contributing to these chemical anomalies.\nIn the first part of this talk\, I will focus on 26Al as a potential tracer of ongoing self-enrichment in young massive star clusters. Detecting 26Al\, particularly through its gamma-ray decay lines at 1.8 MeV and 511 keV\, as well as 26AlF molecules and positronium radio recombination lines\, could provide direct evidence of active self-enrichment. These detections\, especially in nearby clusters like R136 in the Large Magellanic Cloud\, would offer strong support for self-enrichment scenarios.\nThe second part of the talk will explore the potential of using 22.2 GHz water kilomasers as tracers of supermassive stars within forming young massive star clusters. Kilomasers\, such as the W1 source found in NGC 253\, may originate from accretion discs around supermassive stars. Using 2D hydrodynamic simulations\, I model the maser spectra for accretion discs around these stars and find that the kilomaser features align well with observed sources like W1\, suggesting that kilomasers could indeed signal the presence of supermassive stars.\nBy examining these two detection methods\, I aim to demonstrate how 26Al and kilomasers together provide complementary insights into the processes of self-enrichment and the potential role of supermassive stars in the formation and chemical evolution of globular clusters.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2024-12-12-katarzyna-nowak/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250109T130000
DTEND;TZID=Europe/Berlin:20250109T140000
DTSTAMP:20260417T212728
CREATED:20250107T085130Z
LAST-MODIFIED:20250113T210811Z
UID:5503-1736427600-1736431200@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Sebastian Schoenen
DESCRIPTION:From Research to Practice: Applying Artificial Intelligence in the Insurance Industry\nThis presentation provides insights into the practical applications of artificial intelligence (AI) and machine learning in the insurance sector. Using examples from our work at ControlExpert\, I will demonstrate how advanced image recognition and natural language processing (NLP) technologies are leveraged to automate and optimize processes. Additionally\, the talk will highlight how data scientists with backgrounds in physics\, mathematics\, and other disciplines can effectively translate their skills into valuable contributions within the industry.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2025-01-09-sebastian-schoenen/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250123T130000
DTEND;TZID=Europe/Berlin:20250123T140000
DTSTAMP:20260417T212728
CREATED:20241105T151114Z
LAST-MODIFIED:20250113T210938Z
UID:5369-1737637200-1737640800@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Elisa Pueschel
DESCRIPTION:Dark Matter Searches with VERITAS and Dark100\nIndirect dark matter searches are an important piece of the search for dark matter. One indirect search method is to use very-high-energy (E > 100 GeV) gamma rays as a probe of dark matter annihilation or decay in dark-matter-rich astrophysical systems. Gamma rays in this energy range can be used to search for both classical TeV-scale weakly interacting particles and for ultra-heavy dark matter particles predicted in e.g. models of composite dark matter. I will describe efforts to chase light from dark matter using ground-based imaging atmospheric Cherenkov telescopes\, including the current generation VERITAS instrument and the upcoming Dark100 array.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2025-01-23-elisa-pueschel/
LOCATION:ECAP Laboratory\, 00.061\, Nikolaus-Fiebiger-Str. 2\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
END:VEVENT
END:VCALENDAR