Probing Einstein-Maxwell-Scalar Black hole via Thin Accretion Disks and Shadows with EHT Observations of M87* and Sgr A*
General Relativity and Quantum Cosmology
2025-10-03 v3
Abstract
We investigated the shadows and thin accretion disks of Einstein-Maxwell-Scalar (EMS) black hole. Firstly, we investigated the influence of EMS parameters on the black hole shadow using the null geodesic method and constrained these parameters based on EHT observations of M87* and Sgr A*. Furthermore, we analyzed the direct emission, lensing ring, and photon ring structures in EMS black hole. Comparing our results with the Schwarzschild and Reissner-Nordstrm (RN) black holes, we found that the Schwarzschild black hole exhibits the largest shadow radius and the highest observed intensity.
Keywords
Cite
@article{arxiv.2504.10327,
title = {Probing Einstein-Maxwell-Scalar Black hole via Thin Accretion Disks and Shadows with EHT Observations of M87* and Sgr A*},
author = {Yingdong Wu and Ziqiang Cai and Zhenglong Ban and Haiyuan Feng and Wei-Qiang Chen},
journal= {arXiv preprint arXiv:2504.10327},
year = {2025}
}
Comments
37 pages, 52 figures