SPACE AND COSMIC RAY PHYSICS SEMINAR

University of Maryland
Atlantic Building, Room 2400
4:30 PM Monday, February 23, 2015
Coffee, Tea & Snacks 4:15-4:30 PM

Vladimir Ptuskin
Russian Academy of Sciences (IZMIRAN)

Type IIn Supernovae as Sources of High Energy Neutrinos

The diffusive shock acceleration in supernova remnants is discussed. The supernova remnants are the main sources of cosmic rays in the Galaxy. It is quite possible that Type Ia SNRs accelerate particles up to energies 3x1015 Z eV and produce the “knee” in the observed cosmic ray spectrum (Z is the particle charge). The maximum particle energy is higher for supernova explosions in dense wind of a progenitor star. The calculated flux of neutrinos produced by accelerated protons in winds of SN IIn progenitors in the Universe can explain the flux of very high energy astrophysical neutrinos observed in the IceCube experiment.