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Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
The Pierre Auger Collaboration
Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the highest energies, which are correlated with the…
Sterile neutrinos and structure formation
Jaroslaw Stasielak, Peter L. Biermann, Alexander Kusenko
Warm dark matter is consistent with the observations of the large-scale structure, and it can also explain the cored density profiles on smaller scales. However, it has been argued…
Cosmic ray acceleration at modified shocks
A. Meli, P. L. Biermann, S. Dimitrakoudis
The non-linear back reaction of accelerated cosmic rays at the shock fronts, leads to the formation of a smooth precursor with a length scale corresponding to the diffusive scale o…
The spin-flip phenomenon in supermassive black hole binary mergers
László Á. Gergely, Peter L. Biermann
Massive merging black holes will be the primary sources of powerful gravitational waves at low frequency, and will permit to test general relativity with candidate galaxies close t…
Amplified radio emission from cosmic ray air showers in thunderstorms
Stijn Buitink
Cosmic ray air showers produce radio emission, consisting in large part of geosynchrotron emission. Since the radiation mechanism is based on particle acceleration, the atmospheric…
Dark Matter and Sterile Neutrinos
Peter L. Biermann, Faustin Munyaneza
Dark matter has been recognized as an essential part of matter for over 70 years now, and many suggestions have been made, what it could be. Most of these ideas have centered on Co…
Origin and physics of the highest energy cosmic rays: What can we learn from Radio Astronomy?
Peter L. Biermann, P. Gina Isar, Ioana C. Maris +2
Here in this lecture we will touch on two aspects, one the new radio methods to observe the effects of high energy particles, and second the role that radio galaxies play in helpin…
Thermal and chemical evolution of the primordial clouds in warm dark matter models with keV sterile neutrinos in one-zone approximation
Jaroslaw Stasielak, Peter L. Biermann, Alexander Kusenko
We follow the evolution of the baryonic top-hat overdensity in a single-zone approximation. Our goal is to juxtapose the evolution of the gas temperature in the primordial clouds i…