https://doi.org/10.1140/epjc/s10052-025-14831-5
Regular Article - Experimental Physics
Probing Einstein–Maxwell-scalar black hole via thin accretion disks and shadows with EHT observations of M87* and Sgr A*
1
Department of Physics, State Key Laboratory of Quantum Functional Materials, and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology, 518055, Shenzhen, China
2
School of Physics, Guizhou University, 550025, Guiyang, China
3
School of Physics and Electronic Engineering, Shanxi Normal University, 030031, Taiyuan, China
4
Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area, 518045, Shenzhen, China
a
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Received:
2
July
2025
Accepted:
18
September
2025
Published online:
30
September
2025
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–Nordstr
m (RN) black holes, we found that the Schwarzschild black hole exhibits the largest shadow radius and the highest observed intensity.
© The Author(s) 2025
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Funded by SCOAP3.
