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.

Sponsored by: Department of Physics and the Institute for Physical Science and Technology, University of Maryland. For information call Victoria at (301) 405-4811 or go to the UMD Space Physics group seminar web site.

There is free parking after 4:00 PM in lot B (the big parking garage across the street from the ATL building). There are a limited number of spaces in lot Q next to the new ATL wing with free parking after 4PM even when there is a basketball game on campus.