Host: Gwenael Giacinti

Join Tencent Meeting：https://meeting.tencent.com/dm/cFTYPjdNe9sD

Meeting ID: 713521247 (no password）

Abstract:

Cosmic ray (CR) is one of the most important components in the interstellar medium (ISM) and the origin of CRs remains as a mystery. The diffusion of CRs in turbulent magnetic fields erases the information on the distribution of CR accelerators to a large extent. The energy dependent diffusion of CRs also significantly modifies the initial (acceleration) spectra of CRs. In this regard, gamma-rays, the secondary products of interactions of CRs with gas and photons in the ISM, provide us more information about the origin of CRs. More specifically, the gamma-ray emissions associated with gas, can be used to study the distribution of CRs throughout the Galaxy; the discrete gamma-ray sources can elucidate the locations of individual CR accelerators.  In this talk I will review the recent advances of the gamma-ray astronomy and focus on their implications to CR sciences.

Biography:

Prof. Ruizhi Yang got the Bachelor degree in theoretical physics in university of Science and Technology of China (USTC) in 2007. He obtained his PhD in Purple mountain observatory in 2013. After 6 years postdoc career in Max-plank-institute for nuclear physics in Heidelberg, Germany, he joined the department of astronomy in USTC in 2019. His main research interests are gamma-ray astronomy, cosmic ray science.