Photon ring auto-correlations from gravitational fluctuations around a black hole

by Dr 庆华 朱 (ITP, CAS)

Friday 17 Feb 2023, 11:00 → 12:00 Asia/Shanghai

B105 (CHEP)

The images of supermassive black holes in M87 and our galaxy taken by Event Horizon Telescope (EHT) might open up a new window for studying black hole physics at horizon scale. It is well-motivated to extract physical information about emission models and black hole geometries with the images.  In this talk, we will introduce the two-point correlations of intensity fluctuation on the photon ring, as a result of existence of shock waves in Schwarzschild background. With the approaches used in field of gravitational wave detectors, the response functions of EHT can be used for detecting the shock waves based on characteristic shape of the overlap reduction functions. It is found that the correlations we obtained is different from that attributed to stochastic emission sources in pioneers' study, and suggests that the intensity correlations can be used to distinguish the emission models and black hole geometries in the stochastic regime.

个人简介：
2016-2021 高能物理研究所，理论物理博士；
2021-2023 理论物理研究所，博士后；
主要感兴趣黑洞照片和引力波相关研究.

Tecent Meeting: 846-217-139

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