Title:Multi-messenger approach to study the origin of high-energy cosmic rays

　　Speaker: Xiang-Yu Wang (Nanjing University)

　　Time:3 PM, June 29 (Thursday)

　　Location:Lecture Hall, 3rd floor

　　Abstract: Cosmic rays are extremely energetic charged particles with energy up to 10^20 eV. Although these particles have been discovered for more than 100 years, the astrophysical sources ofthem are still unknown. As cosmic rays produce secondary neutrinos and gamma-rays within the source or during the propagation, neutrino and gamma-ray

　　are important messengers to study the origin of the parent cosmic rays. In recent years,a lot ofprogress has been made in this area, thanks to IceCube and Fermi observatories. I will discuss the multi-messenger approach, incorporating gamma-ray, neutrino and cosmic ray research, in studying the origin of Galactic and extra-Galactic cosmic rays.