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July 2019

ECAP Seminar: Markus Demleitner

2019/07/25, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany

The VO And Why It Matters To You In the most technical words, the Virtual Observatory (VO) is an effort to enable uniform and efficient access to astronomical data. With more glitz, it is like the Web and Google, only for data. In this talk I will try to convince you that what sounds tedious and boring in reality is exciting and useful to your research. Thus, after some motivation filling in the gaps in the above definitions, I will…

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November 2019

ECAP Seminar: Sebastian Böser

2019/11/07, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany
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Project 8 - towards a radio frequency measurement of the neutrino mass While neutrino flavour oscillations are a clear indication that neutrinos do have non-vanishing rest masses, their values have so far not been established experimentally. The state-of-the-art experiment KATRIN has recently set a limit for the effective electron neutrino mass at mβ < 1.1 eV/c² @ 90%CL. However, cosmological observations indicate that Σm𝜈 < 0.12eV/c², well below KATRINs final projected sensitivity at m_𝜈 < 0.2 meV/c². As the MAC-E…

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December 2019

ECAP Seminar: Eckhard Sturm

2019/12/05, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany
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The core of the matter – spatially resolving the nuclei of Active Galaxies with VLTI/GRAVITY One of the most exciting opportunities offered by the new VLT beam combiner GRAVITY is to directly resolve the immediate regions around the super-massive black holes (SMBHs) in the centres of active galaxies (AGN), i.e. the Broad Line Region (BLR) and the hot dust (“torus”) structures. We are exploiting this capability to study the inner workings of AGN in the K-band on unprecedented micro-arcsecond (sub-pc)…

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ECAP Seminar: Jörg Hörandel

2019/12/12, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany
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Measuring the properties of cosmic rays with the radio technique The radio emission from air showers is now routinely detected to measure the properties of cosmic rays. An overview is given on recent experimental activities, including observations with the LOFAR radio telescope and the Auger Engineering Radio Array at the Pierre Auger Observatory. Recent results will be discussed. We will give an outlook on our ongoing project to equip all surface detectors of the Auger observatory with radio antennas, forming…

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January 2020

ECAP Seminar: Klaus Desch

January 9, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany
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Axions from Sun? Exploring the low-energy frontier with the IAXO experiment Axions are ultralight hypothetical particles originally postulated to explain the observed smallness of the neutron´s electric dipole moment and its connection with the so-called strong CP-problem, i.e. the fact that QCD allows for CP violation while Nature apparently does not. Meanwhile it is clear that axions, and more generally axion-like particles (ALPs), may also serve as interesting candidates for the observed Dark Matter and may explain certain astrophysical anomalies.…

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ECAP Seminar: Jim Hinton

January 16, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany

HAWC

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ECAP Seminar: Brian Reville

January 23, 13:00 - 14:00
ECAP, room 307, Erwin-Rommel-Str 1
Erlangen, 91058 Germany

Cosmic-ray acceleration - limits and laboratories I will review the current theoretical status of shock acceleration at supernova type shocks, with an emphasis on the plasma theory and implications for limitation on maximum energy. The current hypotheses will be put to the test in a surprising scaled down laboratory, the binary system Eta Carinae.

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June 2020

ECAP Seminar: Dieter Horns

June 18, 13:00 - 14:00
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The Crab nebula and pulsar - particle acceleration at the limit The Crab Nebula is the front-page object of multi-wavelength astrophysics and an excellent object to study non-thermal emission and particle acceleration. The Crab Pulsar powers the extreme accelerator regions that inject an ultra-relativistic plasma into the surrounding nebula. The exceptionally well-defined spectral energy distribution has been measured from the lowest accessible frequencies to the highest photon energies beyond 100 TeV. In this talk, I will provide an overview on the…

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July 2020

ECAP Seminar: Muhammad Kasim

July 2, 13:00 - 14:00
Zoom

Up to two billion times acceleration of scientific simulations with deep neural architecture search Computer simulations are invaluable tools for scientific discovery. However, accurate simulations are often slow to execute, which limits their applicability to extensive parameter exploration, large-scale data analysis, and uncertainty quantification. A promising route to accelerate simulations by building fast emulators with machine learning requires large training datasets, which can be prohibitively expensive to obtain with slow simulations. Here we present a method based on neural architecture…

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ECAP Seminar: Anita Reimer

July 30, 13:00 - 14:00
Zoom

Identifying sources of high-energy neutrinos of the AGN type: A theoretical approach Active galactic nuclei (AGN) have long been predicted to emit neutrinos if they host sites of cosmic-ray acceleration to very high energies. Until a few years ago neutrino astrophysics was merely a prediction by (some) cosmic-ray theorists. It became reality with the first discovery of an astrophysical neutrino flux ~7 years ago. Although the origin of these neutrinos remains unclear up to now, jets of AGN remain among…

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