|Speaker:||Walter Winter (Universitat Wuerburg)|
|Title:||Gamma-ray bursts as the sources of the ultra-high energy cosmic rays?|
|Date (JST):||Wed, Oct 30, 2013, 13:30 - 14:30|
|Place:||Seminar Room A|
One of the major puzzles in astroparticle physics is the origin of the ultra-high energy cosmic rays (UHECRs). In this talk, we reconsider if UHECR protons could be produced by gamma-ray bursts (GRBs) within the conventional internal shock model. Since important clues may be obtained from neutrino observations in the PeV (prompt neutrinos) and EeV (cosmogenic neutrinos) ranges, we especially focus on the multi-messenger connection among gamma-rays, cosmic rays, and neutrinos. One of the relevant aspects affecting this picture is the way cosmic rays can escape from the sources. Another one is a
self-consistent derivation of the cosmic energy budget. We therefore present, for the first time, a combined source-propagation model for the multi-messenger connection among gamma-rays, neutrinos (prompt and cosmogenic), and UHECRs.