Probing the Strong Gravity Region of Black Holes with eXTP
High Energy Astrophysical Phenomena
2025-09-09 v2 General Relativity and Quantum Cosmology
Abstract
We present the novel capabilities of the enhanced X-ray Timing and Polarimetry (eXTP) mission to study the strong gravity region around stellar-mass black holes in X-ray binary systems and supermassive black holes in active galactic nuclei. eXTP can combine X-ray spectral, timing, and polarimetric techniques to study the accretion process near black holes, measure black hole masses and spins, and test Einstein's theory of General Relativity in the strong field regime. We show how eXTP can improve the current measurements of black holes of existing X-ray missions and we discuss the scientific questions that can be addressed.
Cite
@article{arxiv.2506.08105,
title = {Probing the Strong Gravity Region of Black Holes with eXTP},
author = {Qingcui Bu and Cosimo Bambi and Lijun Gou and Yanjun Xu and Phil Uttley and Alessandra De Rosa and Andrea Santangelo and Silvia Zane and Hua Feng and Shuang-Nan Zhang and Chichuan Jin and Haiwu Pan and Xinwen Shu and Francesco Ursini and Yanan Wang and Jianfeng Wu and Bei You and Yefei Yuan and Wenda Zhang and Stefano Bianchi and Lixin Dai and Tiziana Di Salvo and Michal Dovciak and Yuan Feng and Hengxiao Guo and Adam Ingram and Jiachen Jiang and Vladimir Karas and Dongyue Li and Honghui Liu and Guglielmo Masteroserio and Giorgio Matt and Sara Motta and Guobin Mou and Abdurakhmon Nosirov and Zhen Pan and Erlin Qiao and Rongfeng Shen and Qingcang Shui and Yujia Song and Jiri Svoboda and Lian Tao and Alexandra Veledina and Zhen Yan and Tong Zhao},
journal= {arXiv preprint arXiv:2506.08105},
year = {2025}
}
Comments
accepted for publication in the SCIENCE CHINA Physics, Mechanics & Astronomy