Information field theory - turning data into images Charting the Universe from measurements is a challenging information theoretical problem. The finite data provided by instruments is never able to constraint the infinite degrees of freedom of the physical fields we are interested in astronomy or other areas. Additional information like physical laws and empirical correlations […]
HyperKamiokande: a next generation long baseline neutrino experiment in Japan The seminar will present the HyperKamiokande (HyperK) project which will build a large volume water Cerenkov detector for long baseline neutrino oscillation studies in Japan. A brief historical resume of the discovery of neutrino oscillations will be provided. The presentation will give an overview of […]
Radio detection of ultra-high energy neutrinos High energy neutrino astronomy is a powerful tool to study the high-energy universe. Neutrinos can escape dense source environments and point back to their sources with sub-degree accuracy. In particular, multi-messenger analyses that combine neutrino detection with electromagnetic (e.g. gamma ray) and gravitational-wave observations bear huge potential to probe […]
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 […]
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 […]
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 […]
Exploring extreme states of matter with an ultra-bright X-ray free-electron laser In this talk, we will review recent progress in high-energy density physics using the world’s brightest X-ray source, the Linac Coherent Light Source, SLAC's free electron X-ray laser. These experiments investigate laser-driven matter in extreme conditions where powerful X-ray scattering and imaging techniques have […]
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 […]
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 […]
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) […]
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 […]
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 […]
