Nagoya University: Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)

Nagoya University


KMI Colloquium
"Multi-Messenger Era of High Energy Astrophysics"
Kunihito Ioka
(Yukawa Institute for Theoretical Physics, Kyoto University)
January 11, 2017 (Wed) 17:30-
KMI Science Symposia (ES635)
High energy phenomena, such as gamma-ray bursts and cosmic rays, are ubiquitous in the universe. Revealing their origin and evolution is one of the most interesting subjects in the studies of the universe. Deeply understanding these phenomena also provides feedback on cosmology as well as high-energy and high-density physics. The last decades witnessed the great progress in this field. We have now established that stellar collapses produce supernova explosions and sometimes gamma-ray bursts. Stellar explosions release heavy elements into space, which finally result in our life. Expanding ejecta make shocks, leading to particle acceleration and the observed cosmic rays. Compact objects such as black holes and neutron stars are left behind, which act as central engines of high energy emission. At the same time, however, these developments pose new problems. In the 21th century, we will attack these problems by using multi-messengers, i.e., gravitational waves, neutrinos and cosmic rays in addition to photons. In this talk, we will review these progress and problems and discuss future prospects in the high energy astrophysics from my perspective.