Kohta Murase (Ohio State U.)

Revealing Extragalactic Cosmic-Ray Accelerators with High-Energy Neutrinos and Gamma Rays

The origin of high-energy cosmic rays, especially

ultra-high-energy cosmic rays (UHECRs), has been one of the biggest

mysteries in physics and astronomy. The multi-messenger approach,

using neutrinos and gamma rays as well as cosmic rays, seems necessary

in order to reveal the sources. Recently, a Gton neutrino detector,

IceCube, has been completed, and several Cherenkov gamma-ray

telescopes as well as the gamma-ray satellite Fermi are now operating,

so that the era of the multi-messenger observations is coming. In this

talk, we discuss diagnostic multi-messenger signals from extragalactic

astrophysical sources, neutrinos, cascaded GeV-TeV gamma rays and

ultrahigh-energy gamma rays.

May 23 at 4pm in Geo/Phys Room 407