Origin of UHECR: current status of a decades-long open question Ultra-high-energy cosmic rays (UHECR) are the most energetic known particles of the Universe, being accelerated to energies up to 7 orders of magnitude higher than those achieved in human-made accelerators. Their origins, however, remain an intriguing puzzle even decades after their discovery. In this seminar, […]
Light-Shining-Through-A-Wall: The ALPS II experiment at DESY The ALPS II at DESY in Hamburg is a light-shining-through-a-wall (LSW) experiment searching for axion-like elementary particles in the sub eV mass range, which are motivated by astrophysics and cosmology. ALPS II aims at an axion-photon coupling sensitivity which is several orders of magnitude better than that of […]
The ECAP Laboratory The ECAP Laboratory will provide the infrastructure for the experimental-based research of the scientific groups of the institute. The concept of this "Forschungsbau" as well as the timeline for the completion and start of operation will be presented.
Radio Detection of High Energy Neutrinos and Deep Learning In this seminar talk, I will present the current status of in-ice radio detection of ultra-high-energy (UHE, E > 10^16 eV) neutrinos and how we use deep learning to improve the trigger system and event reconstruction. UHE neutrinos are connected to the most energetic phenomena in […]
Two years of eROSITA all-sky surveys: The variable X-ray sky The eROSITA telescope onboard the SRG satellite was launched on 13 July 2019. After an initial phase of calibration and performance verification observations eROSITA started its all-sky survey operation in December 2019. Covering the entire sky within 6 months, eROSITA is now close to completing […]
Galaxy evolution and cosmology using gamma rays observed with Fermi-LAT The light emitted by all galaxies across the history of the Universe is encoded in the intensity of the extragalactic background light (EBL), the diffuse cosmic radiation field at ultraviolet, optical, and infrared wavelengths. The EBL is a source of opacity for very high energy […]
The Muon Puzzle in cosmic-ray induced air showers and its connection to the LHC High-energy cosmic rays are observed indirectly by detecting extensive particle showers initiated in Earth's atmosphere. These so-called air showers are hadronic cascades which produce a muon component via hadron decay. The muon number is a key observable to infer the mass […]
Recent highlights from the LHAASO observatory The Large High Altitude Air Shower Observatory (LHAASO), located in China at 4410m above sea level, is a complex of extensive air shower (EAS) detector array. Utilizing different detection techniques, LHAASO surveys the entire northern gamma-ray and cosmic-ray sky with a wide energy range from sub-TeV to PeV energies. […]
Radar based exploration of subglacial structures Ice-penetrating radar is one of the most important techniques in glaciological research. Applications can range from gaining insights about the internal structure of glaciers and ice sheets, to calculating ice volume, to the detection of hidden features such as crevasses. Recent advances in electronics and radar signal processing offer […]
New ECAP Lab information Stefan and Kay will report on the status, the usage strategy and the next steps for the ECAP Laboratory.
On the radiation signatures of Galactic PeVatrons: the gamma-ray and neutrino perspective Very-high-energy gamma rays and neutrinos are crucial messengers for assessing the PeVatron nature of cosmic sources. In particular, supernova remnants (SNRs) are since long time believed to be the major contributors to the Galactic cosmic-ray flux observed at Earth. Despite experimental efforts devoted […]
Revealing Lightning with the LOFAR radio telescope Lightning is an extremely complex phenomena that is still only poorly understood. For example, we do not know how lightning initiates, how it propagates, or why it emits intense bursts of gamma radiation. One fundamental difficulty in studying lightning is that the best state-of-the-art models are only applicable […]
