Black Hole Spin and Stellar Flyby Periastron Shift
- Creators
- Tito, Elizabeth P.
- Pavlov, Vadim I.
Abstract
For a scenario of a close flyby of a compact star near a spinning black hole, we provide analytical and numerical estimates for the shift of trajectory periastron due to relativistic (beyond post-Newtonian) effects. More specifically, we derived a generalized expression (not limited to quasi-circular or elliptical orbits) directly linking the periastron shift and the spin of the black hole. The expression permits the estimation of black hole spin based on astronomical tracking of locations of stars traveling along highly eccentric (parabolic and hyperbolic) trajectories in close vicinity of a black hole. We also demonstrate how stars traveling on hyperbolic or parabolic trajectories may be (temporarily) captured onto quasi-circular orbits around black holes, and we quantitatively examine conditions for such scenarios.
Additional Information
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Received: 30 August 2021; Accepted: 26 September 2021; Published: 29 September 2021. This research received no external funding. Author Contributions: Conceptualization and writing, E.P.T. and V.I.P. All authors have read and agreed to the published version of the manuscript. Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. The authors declare that there is no conflict of interest regarding the publication of this article.Attached Files
Published - universe-07-00364.pdf
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Additional details
- Eprint ID
- 112018
- Resolver ID
- CaltechAUTHORS:20211123-204656813
- Created
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2021-11-23Created from EPrint's datestamp field
- Updated
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2021-11-23Created from EPrint's last_modified field