信息发布：游贝 教授 （武汉大学）
发布时间：2026-10-27
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摘要：In a BHXRB, the X-ray emitting region is far too small to be directly imaged, but rapid variability of the X-ray signal can be used to infer the geometry by measuring time lags caused by material propagating towards the black hole and by coronal X-rays reflecting off the disk to imprint a reverberation lag. In this talk, I will introduce our recent theoretical/observational studies on the X-ray fast variability with HXMT observations. On short-timecale, we report on the first detection of the Compton hump reverberation feature from an X-ray binary, achieved by measuring lags in the broad energy range of 1-150 keV; On long-timescale, the lag measurements up to the highest energy to date reveal that this lag evolves dramatically on timescales of days. These discoveries helps us mapping the accretion flow at the very beginning of the outburst and its evolution.
简介：Dr. Bei You is a professor in the School of Physics and Technology at Wuhan University and a recipient of the Xiaomi Young Scholar Award. He received his PhD from Shanghai Astronomical Observatory in 2014 and subsequently held a postdoctoral position at the Nicolaus Copernicus Astronomical Centre in Poland from 2014 to 2017. He joined Wuhan University in October 2017. His research focuses on black hole accretion and jets, with particular emphasis on the spectral and timing properties of black hole X-ray binaries during outbursts. His work, published in leading international journals including Science and Nature Communications, has advanced our understanding of accretion physics and magnetic field transport around black holes.
