报告题目：Neutrino, Nucleosynthesis in Neutron Star Mergers and Multi-messenger Observations多信使观测以及中子星合并中的中微子与核合成

　　报告人：Yonglin Zhu（the SAS Institute）

　　报告摘要：The first combined observations of the gravitational wave event GW170817 and electromagnetic counterpart AT2017gfo reveal many signs that neutron star mergers could be the primary production site of the heaviest elements in the universe. The nucleosynthesis processes of the heaviest elements in such explosive astrophysical environments involve many aspects of astrophysics, nuclear physics, and atomic physics. However, the interpretation of such events suffers from many uncertainties, such as the type of ejecta, nuclear data, spectral information of newly made nuclei, etc. In this talk, I will investigate the nucleosynthesis of the heaviest elements in neutron star mergers by exploring how r-process isotope productions link to light curve signals. I will demonstrate that individual nuclei, such as Californium-254, contributes significantly more than others in powering the kilonova light curve, which is independent of nuclear physics inputs and within a specific range of astrophysical conditions. Moreover, to estimate the nuclear uncertainties in r-process nucleosynthesis and its impact on the observations, I will discuss our findings in nucleosynthesis-informed kilonova light curve modeling. I will also discuss how neutrino oscillations could dramatically impact the nucleosynthesis processes in neutron star mergers.

　　报告时间：2023年10月24日星期二14:30

　　报告地点：紫台5号楼516会议室

欢迎大家参加！