【7.16; Seminar】2024年粒子天体物理重点实验室系列学术报告 #38：Signatures from late-time disk accretion in neutron star mergers

时间/Time：7月16日上午10: 00/Tuesday, July 16th at 10:00 am

地点/Location：多学科楼226会议室/Multidisciplinary Building 226

报告人/Speaker：Wenbin Lu (鲁文宾)（UC Berkeley）

题目/Title：Signatures from late-time disk accretion in neutron star mergers

主持人/Host：熊少林 研究员

Zoom会议号 Meeting ID: 85159008188

会议链接 Meeting URL：https://us02web.zoom.us/j/85159008188?pwd=KYqiuz7TBzDT9YZptxPRGBBosZs0Nb.1

入会密码Password：123456

摘要/Abstract：

Short gamma-ray bursts (GRBs) are now confidently associated with neutron star mergers. In the past decade, little attention has been paid to the extended emission, which lasts for about 100 seconds and is spectrally soft compared to the short-duration, hard prompt emission in these sources. We study the late-time accretion onto the merger remnant on previously unexplored timescales of minutes to hours and propose a simple model for the extended emission based on our findings. We further predict the existence of "orphan extended emission" (without the short GRB) as a promising EM counterpart for neutron star mergers, observable by current/future wide-field X-ray instruments like Einstein Probe, GECAM, and SVOM. This model also predicts narrow-band spectral features in the kilonova, potentially detectable by JWST.

个人简介/Biography：

Wenbin Lu (鲁文宾) is a theorist working on high-energy transients.

2013 BS in Physics from Peking University

2018 PhD in Astronomy from University of Texas Austin

2019-2022 postdoc at Caltech and Princeton University

2022-now assistant professor at UC Berkeley.