报告题目：Impact of Neutron Star Mergers vs. Supernovae on Explosive Nucleosynthesis and Neutrino Physics
报 告 人：Toshitaka Kajino
Beihang University/National Astronomical Observatory of Japan/The University of Tokyo, Professor
报告时间：2017年12月13日下午14:00
报告地点：清华大学刘卿楼105
主 持 人：王喆 副教授
报告摘要：
GW170817 was really an event of the century that has opened the window to the frontier of multi-messenger astronomy and astrophysics.  Gravitational waves from most likely the merging neutron stars were clearly detected in LIGO-Virgo collaboration, and optical and near-infrared emissions observed in several Telescopes are consistent with those from radiative decays of r-process nuclei which are predicted theoretically in the nucleosynthesis calculation.  Neutrinos were not detected unfortunately because of their too low flux from GW170817 that occurred at a distance 0.13 Gly away.  We now await a nearby GW event (probably once per one thousand years in our Milky Way) for spectroscopic observations to identify if the r-process elements are really synthesized in NSMs.
     Not only the NSMs but core-collapse supernovae (of both magneto-hydrodynamic jet supernovae; MHD Jet-SNe, and neutrino-driven wind supernovae; ν-SNe) are viable candidates for the r-process sites.  NSMs could not contribute to the early Galaxy for cosmologically long merging time-scale for slow GW radiation, while MHD Jet-SNe can explain the “universality” in the observed abundance pattern in metal poor stars.  However, the NSM is still a possible nucleosynthetic site for the solar-system abundance.  We would like to propose a novel solution to this twisted problem by carrying out both NSM and SN r-process nucleosynthesis calculations and numerical simulation of Galactic chemo-dynamical evolution.  We will also discuss the impact of the SN nucleosynthesis on the physics of neutrino oscillations (including all three MSW, collective and vacuum oscillations).

报告人简介：
Prof. Toshitaka Kajino, who is the Cosmology and Nuclear Astrophysics group leader and holds the professorship at National Astronomical Observatory of Japan and The University of Tokyo, is honored with One Thousand Talents (Foreign Expert) Professor in China in 2017.  He is appointed a distinguished professor at the School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics (Beihang University) in Beijing from this March.  He is also the first Director of International Research Center for Big-Bang Cosmology and Element Genesis (IRCBBC) which is newly established in International Research Institute for Multidisciplinary Science at Beihang University.
 

第255期“论坛”主请人联系方式：
王喆 13488749507 wangzhe-hep@mail.tsinghua.edu.cn