https://doi.org/10.1140/epjc/s10052-025-14423-3
Regular Article - Theoretical Physics
Thin accretion disk around rotating hairy black hole: radiative property and optical appearance
1
School of Science, Jiangsu University of Science and Technology, 212100, Zhenjiang, China
2
School of Mathematics and Physics, Yancheng Institute of Technology, 224051, Yancheng, Jiangsu, China
Received:
16
April
2025
Accepted:
6
June
2025
Published online:
20
June
2025
The gravitational decoupling method systematically generates hairy modifications to the solutions in general relativity due to new gravitational sources. In view of the recent advances in astronomical observations, these hairy solutions are expected to be testable in near-term observations. In this paper, we study the radiative property and optical appearance of the thin accretion disk around the rotating hairy black holes obtained by gravitational decoupling. We numerically compute the radiative flux, temperature, differential luminosity, spectral luminosity, and radiative efficiency of the thin accretion disk, and we also show its bolometric image by the ray-tracing method. By comparing with the results for the Kerr metric, we found that the deviations of the observational properties of the thin accretion disk from those of Kerr metric becomes significant in the rapid rotating case, or in the inner region of the disk. These results guide the observational investigations on the rotating hairy black hole.
© The Author(s) 2025
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Funded by SCOAP3.
