https://doi.org/10.1140/epjc/s10052-022-10686-2
Regular Article - Theoretical Physics
Probing bumblebee gravity with black hole X-ray data
1
Center for Field Theory and Particle Physics and Department of Physics, Fudan University, 2005, Songhu Road, 200438, Shanghai, China
2
Ulugh Beg Astronomical Institute, Astronomy Str. 33, 100052, Tashkent, Uzbekistan
3
Institute of Fundamental and Applied Research, National Research University TIIAME, Kori Niyoziy 39, 100000, Tashkent, Uzbekistan
4
Theoretical Astrophysics, Eberhard-Karls Universität Tübingen, Auf der Morgenstelle 10, 72076, Tübingen, Germany
Received:
30
June
2022
Accepted:
7
August
2022
Published online:
15
August
2022
Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can potentially test this model with the available astrophysical observations of black holes. In this work, we construct a reflection model in bumblebee gravity and we use our model to analyze the reflection features of a NuSTAR spectrum of the Galactic black hole EXO 1846-031 in order to constrain the Lorentz-violating parameter 
. We find that the analysis of the reflection features in the spectrum of EXO 1846-031 cannot constrain the parameter because of a very strong degeneracy between the estimates of and of the black hole spin parameter 
. Such a degeneracy may be broken by combining other observations.
© The Author(s) 2022
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