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ECAP Seminar

Upcoming seminars:

June 27, 13:00 — 14:00

Cosmic rays between the knee and the ankle

Investigations of the energy spectrum as well as the mass composition of cosmic rays in the energy range of PeV to EeV are important for understanding both, the origin of the galactic and the extragalactic cosmic rays. The multi-detector arrangement of KASCADE and its extension KASCADE-Grande was designed for observations of cosmic ray air showers in this energy range. Most important result from KASCADE is the proof that the knee feature at several PeV is due to a decrease in the flux of light atomic nuclei of primary cosmic rays. Results of KASCADE-Grande have now shown two more spectral features: a knee-like structure in the spectrum of heavy primaries at around 90 PeV and a hardening of the spectrum of light primaries at energies just above 100 PeV. These features are meanwhile confirmed by other experiments like Tunka, IceCube/IceTop, or TA/TALE. In this seminar the recent results on energy spectrum and composition are compared to each other and with astrophysical models for the energy range, where the transition from galactic to extragalactic origin of cosmic rays are expected. In addition, the effects of using different hadronic interaction models for interpreting the measured air-shower data will be discussed. Finally, the KASCADE Cosmic Ray Data Centre (KCDC) is discussed, which is a web-based platform to provide astroparticle physics data for the general public. The main purpose of KCDC is to archive original data to offer long-term scientific data for the high-energy astroparticle physics community as well as for students and the interested public via a sophisticated web portal. However, KCDC can only be a first step into a global analysis and data centre for multi-messenger astroparticle physics.

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July 4, 13:00 — 14:00

Indirect Dark Matter Searches and Cosmic Ray Transport in the Era of AMS

The Alpha Magnetic Spectrometer (AMS) is installed on the International Space Station (ISS) since May 2011. AMS is a complex particle detector designed to precisely measure the fluxes of cosmic rays between 0.5 GeV and a few TeV. The physics goals of the experiment include the search for possible signals of dark matter annihilation and hints for primordial antimatter in the fluxes of cosmic rays. As of recently, new calorimetric experiments like CALET and DAMPE begin to shed even more light on the matter component in cosmic rays with high statistics measurements up to TeV energies.
A plethora of precision results is emerging from these experiments. Many results challenge our understanding of galactic cosmic ray transport. This talk provides an overview over some of the most exiting and often surprising results from AMS, CALET and DAMPE. I will discuss their impact on our understanding of the origin and transport of galactic cosmic rays and their contribution to indirect dark matter searches.

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July 11, 13:00 — 14:00

High-energy neutrinos from AGN?

With the advent of multi-messenger observatories, neutrino astronomy is turning into a helpful tool to investigate and put limits on the contribution of the known astrophysical objects to the diffuse neutrino background. Active Galactic Nuclei (AGN) have long been suggested among the candidate sources of cosmic high-energy neutrinos. If hadronic processes operate in the AGN jets, a lot can be learnt by combining neutrino observations with the putative accompanying electromagnetic information. This is motivated by the fact that both radiations may be pictured in the same astrophysical particle-cascades scenario, cascades that are ultimately originated by cosmic rays. While to date no neutrino point sources have been identified at high confidence, a promising ground for discovery could be the search for transient and variable neutrino/electromagnetic sources, in which case the atmospheric neutrino and muon backgrounds can be reduced by taking advantage of time- and space-coincidence. Recent outcomes in this field will be presented.

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Timetable Summer Term 2019

Date Time Speaker Institute Topic
May 2 13:00 Thorsten Enßlin MPIA, Garching Information field theory – turning data into images
Jun 6 13:00 Lee Thompson University of Sheffield HyperKamiokande: a next generation long baseline neutrino experiment in Japan
Jun 13 13:00 Christian Glaser UC Irvine Radio detection of ultra-high energy neutrinos
Jun 27 13:00 Andreas Haungs KIT, Karlsruhe Cosmic rays between the knee and the ankle
Jul 4 13:00 Iris Gebauer KIT, Karlsruhe Indirect Dark Matter Searches and Cosmic Ray Transport in the Era of AMS
Jul 11 13:00 Sara Buson Universität Würzburg High-energy neutrinos from AGN?
Jul 18 13:00 Siegfried Glenzer Stanford University Laboratory Astrophysics

Timetable Winter Term 2018/19

Date Time Speaker Institute Topic
Nov 22 13:00 Anna Franckowiak DESY, Zeuthen Searching for electromagnetic counterparts to high-energy neutrinos
Dec 13 13:00 Thomas Heid ECAP Characterizing the diffuse neutrino flux with the future KM3NeT/ARCA detector (PhD defense)
Dec 20 13:00 Florian Kühnel KTH Stockholm Primordial Black Holes as Dark Matter
Jan 10 13:00 Klaus Helbing Universität Wuppertal Probing Particle Physics with IceCube
Jan 31 13:00 Joachim Puls LMU München On the difficulties to derive reliable CNO abundances in hot massive stars
Feb 7 13:00 Marijke Haverkorn Radboud University Nijmegen The Magnetic Field of the Milky Way
Feb 14 13:00 Takaaki Tanaka Kyoto University Recent Results from X-ray Studies of Supernova Remnants

Timetable Summer Term 2018

Date Time Speaker Institute Topic
Apr 25 13:00 Christoph Weniger GRAPPA, Amsterdam Dark matter searches with gamma rays
May 2 13:00 Kay Graf & Stefan Funk ECAP News from the ECAP laboratory
May 16 13:00 Thomas Janka MPIA Garching 3D core-collapse supernova modeling and applications to Cas A and other supernova remnants
May 23 12:30 Henning Gast RWTH Aachen Latest results from the AMS experiment on the International Space Station
May 30 13:00 Oliver Hupe PTB Braunschweig Radiation Protection Dosimetry: Phantoms and measuring quantities
Jun 6 13:00 Michael Schulreich TU Berlin Reconstructing the origin of the Local Bubble and Loop I via radioisotopic signatures on Earth
Jun 13 13:00 Adrian Zink ECAP Updates of the ECAP desktop computing system
Jun 20 13:00 Frank Haberl MPE Garching The XMM-Newton surveys of the Magellanic Clouds
Jun 27 13:00 Bosco Oruru Makerere University, Uganda Status of Astronomy in East Africa: Focus on Uganda
Jul 4 13:00 Gisela Anton / Joern Wilms ECAP Status report on IceCube-Gen2 / eROSITA
Jul 11 14:00 Andrea Santangelo IAA Tübingen Fundamental Physics studies with X-ray spectral-timing-polarimetry and the eXTP mission

Timetable Winter Term 2017/18

Date Time Speaker Institute Topic
Oct 18 13:00 Anatoli Fedynitch DESY, Zeuthen State-of-the-art atmospheric lepton flux Tools
Nov 22 13:00 Stefan Jordan ZAH Heidelberg The Gaia Mission – Overview, First Results, and future prospects
Nov 29 13:00 Chris Belczynski Copernicus Center Warsaw The Astrophysics of BH-BH/NS-NS Mergers with LIGO/Virgo
Dec 13 13:00 Jochen Greiner MPE Garching The gravitational wave detection of a binary neutron star merger: expectations, surprises, and prospects
Dec 20 13:00 Marek Kowalski Humboldt-University Berlin A new era in multi-messenger astronomy
Jan 24 13:00 Arne Rau MPE Garching Overview of Athena and the Wide Field Imager
Jan 31 13:00 Christian Motch Observatoire Astronomique Strasbourg SVOM – Space-based multiband astronomical Variable Objects Monitor
Feb 1 15:00 Thorsten Lisker ZAH Heidelberg Survival in galaxy clusters: from ultra-diffuse to ultra-compact objects

Timetable Summer Term 2017

Date Time Speaker Institute Topic
April 26 13:00 Abigail Stevens University of Amsterdam Comparing origins of low-frequency quasi-periodic oscillations with spectral timing
May 10 13:00 Stefan Geißelsöder ECAP Pattern recognition and deep learning
May 17 13:00 Kathrin Valerius Karlsruhe Institute of Technology Status and prospects of direct neutrino mass searches: News from KATRIN and outlook on future projects
May 23 11:00 Jakob van Santen DESY, Zeuthen What’s new in IceCube?
May 24 13:00 Andrii Neronov EPFL, Lausanne Galactic and extragalactic contributions to the astrophysical neutrino flux
May 31 13:00 Francesco Longo Trieste, INFN GRB observations at High and Very High Energy
June 7 13:00 Philipp Mertsch RWTH Aachen Cosmic ray anisotropies: unravelling sources and transport
June 14 13:00 Alexander Fieguth Universität Münster XENON1T & the challenge of direct dark matter detection
June 21 13:00 Harm Schoorlemmer MPI-K Heidelberg Observing the TeV gamma-ray sky with the High-Altitude Water Cherenkov Observatory
June 28 13:00 Livia Ludhova Forschungszentrum Jülich JUNO: the first multi-kton liquid scintillator based neutrino detector
July 6 10:00 Francois Brun Université de Bordeaux / CNRS The H.E.S.S. Galactic Plane Survey
July 12 13:00 Laura Spitler MPIfR Bonn Fast radio bursts
July 19 12:00 ECAP Sommerfest
July 26 13:00 Stefan Funk / Uli Katz ECAP Status report on CTA / KM3NeT

Timetable Winter Term 2016/17

Date Time Speaker Institute Topic
Oct. 26 13:00 Julian Rautenberg Universität Wuppertal Radio detection of cosmic-ray air showers
Nov. 23 13:00 Timo Karg DESY, Zeuthen IceCube: future vision and R&D
Nov. 30 13:00 Axel Schwoie AIP Potsdam The Polars (still crazy after all those years)
Dec. 07 13:00 Daniel Kümpel RWTH Aachen Hunting for ultra-high energy photons
Dec. 14 13:00 Stefan Klepser DESY, Zeuthen The Population of Galactic TeV Plerions and a Major Electronics Upgrade for H.E.S.S.
Dec. 21 13:00 Walter Assmann TU München The sound of protons – ionoacoustic range monitoring in proton therapy
Jan. 11 13:00 Michael Wurm JGU Mainz Ten years of Borexino: from solar to sterile neutrinos
Jan. 25 13:00 Christoph Pfrommer Heidelberg Institute for Theoretical Studies Cosmic ray feedback in galaxies and AGN
Feb. 01 13:00 Thomas Reiprich Argelander Institut Bonn Galaxy Clusters