邀请人 (Invited by): 尧江明

时间 (Time): 星期三，2023/12/13-10:30-11:30

地点 (Location): 珠海校区天琴中心2102

摘要 (Abstract): 

There is a growing consensus in multi-messenger astronomy that the neutron-star merger as well as core-collapse supernova and collapsar, which are respectively very massive stars collapsing to neutron star and black hole, could be the possible sites for heavy-element nucleosynthesis. We first discuss when and how these three different sites contribute to the enrichment of heavy elements along the cosmic evolutionary history during 13.8 Gy. These explosive phenomena produce extremely high flux of energetic neutrinos and provide unique nucleosynthetic signals for neutrino flavor oscillation and matter interactions at high-density which could not be studied in reactor or long-baseline neutrino oscillation experiments. We, secondly, discuss how to constrain still unknown neutrino mass-hierarchy from supernova nucleosynthesis. 

主讲人简介 (Speaker's CV): 

Prof. Toshitaka Kajino is a theoretical nuclear astrophysicist and cosmologist. Hisresearch areas include particle cosmology,nucleosynthesis in the big-bang, stars,and galaxies, supernovae and neutron star mergers, galactic chemo-dynamical volution, neutrino oscillation, astrobiology etc.He has published over 250 original papers in international journals and presented over 300 international conference talks. He was a professor at Tokyo Metropolitan University, The University of Tokyo,and National Astronomical Observatory of Japan, and is currently a Distinguished Professor at Beijing University of Aeronautics and Astronautics (BUAA), Director of International Research Center for Big Bang Cosmology and Element Genesis (IRCBBC), and Chief Scientist of Peng Huanwu Collaborative Center for Research and Education. He was awarded the Fellow of the American Physical Society in 2004 and also a Foreign Specialized High-end Scholar in One Thousand Talents Plan Foreign Expert, P. R. of China in 2016. He is a proponent of bi-annual international conference ‘Origin of Matter and Evolution of Galaxies (OMEG)’ which is the oldest conference in the interdisciplinary field of cosmology, nuclear astrophysics and astronomy that started from Tokyo in 1988. He has served on various international and domestic review committees and editorial boards of research journals.