应兰州大学物理学院杨捷副教授邀请，上海天文台韩文标研究员举办线上学术报告。欢迎广大师生届时参加！

题目：银心及临近星系中的引力波爆

报告人：韩文标研究员

时间：2020年9月2日（周三）下午15:00-15:50

线上地点：腾讯会议（673587638）

联系人：杨捷副教授

报告摘要： Two recent papers(Amaro Seoane 2019; Gourgoulhon et al. 2019) revealed that in our Galaxy, there are very extreme-mass-ratio inspirals composed by brown dwarfs and the supermassive black hole in the center. The event rates they estimated are very considerable for space-borne detectors in the future. However, there are also plunge events during the formation of insprialing orbits. In this work, we calculate the gravitational waves from compact objects (brown dwarf, primordial black hole and etc.) plunging into or being scattered by the center supermassive black hole. We find that the signal-to-noise ratio of these bursts are quite large for space-borne detectors. The event rates are estimated as ∼ 0.01 in one year for the Galaxy. If we are lucky, this kind of very extreme-mass-ratio bursts (XMRBs) will offer a unique chance to reveal the nearest supermassive black hole and nuclei dynamics. The event rate can be as large as 4 ∼ 8 per year in 10 Mpc, and the signal is strong enough for space-borne detectors, then we have a good chance to probe the nature of neighboring black holes.

报告人简介：韩文标，现为中国科学院上海天文台研究员，中国科学院大学岗位教授，博士生导师。长期从事极端质量比系统的轨道动力学和引力波模拟，提出的EOB-Teukolsky数值框架在极端质量比中得到较广泛的应用。和合作者一起提出SEOBNRE模型，是当前精度最高的椭圆双星引力波模版，被LIGO多个团队应用到椭圆双星的信号搜索中。目前已发表SCI论文40余篇，专著两部。