Title: Primordial black holes from vacuum bubbles
Speaker: Heling Deng 邓鹤凌 (Arizona State University)
Time: 10:30am, May 19 (Thursday) 2022
Abstract: The LIGO-Virgo Collaboration has so far detected more than 100 black holes, whose mass distribution appears to have a peak at ∼ 30M☉ and two tails on the ends. By assuming that they all have a primordial origin, we analyzed the LIGO datasets by performing maximum likelihood estimation on a broken power law mass function, which appears to behave better than the popular log-normal mass function. Surprisingly, such a simple distribution can be realized in our previously proposed mechanism of primordial black holes, where the black holes are formed by vacuum bubbles that nucleate during inflation via quantum tunneling. These black holes could also serve as seeds of supermassive black holes.
Bio: 邓鹤凌，2013年本科毕业于中山大学，2019年博士毕业于塔夫茨大学，现为亚利桑那州立大学博士后。主要研究兴趣为宇宙学和天文物理学。
