Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40
Publication Date
2021-11Journal Title
European Physical Journal C
ISSN
1434-6044
Publisher
Springer Science and Business Media LLC
Volume
81
Issue
11
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Jiang, X., Wang, P., Yang, H., & Wu, H. (2021). Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40. European Physical Journal C, 81 (11) https://doi.org/10.1140/epjc/s10052-021-09816-z
Abstract
<jats:title>Abstract</jats:title><jats:p>The measurements of quasi-periodic oscillations (QPOs) provide a quite powerful tool to test the nature of astrophysical black hole candidates in the strong gravitational field regime. In this paper, we use QPOs within the relativistic precession model to test a recently proposed family of rotating black hole mimickers, which reduce to the Kerr metric in a limiting case, and can represent traversable wormholes or regular black holes with one or two horizons, depending on the values of the parameters. In particular, assuming that the compact object of GRO J1655-40 is described by a rotating black hole mimicker, we perform a <jats:inline-formula><jats:alternatives><jats:tex-math>$$\chi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>χ</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>-square analysis to fit the parameters of the mimicker with two sets of observed QPO frequencies from GRO J1655-40. Our results indicate that although the metric around the compact object of GRO J1655-40 is consistent with the Kerr metric, a regular black hole with one horizon is favored by the observation data of GRO J1655-40.</jats:p>
Keywords
Regular Article - Theoretical Physics
Identifiers
s10052-021-09816-z, 9816
External DOI: https://doi.org/10.1140/epjc/s10052-021-09816-z
This record's URL: https://www.repository.cam.ac.uk/handle/1810/332524
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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