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- Title
Black Hole Spin and Stellar Flyby Periastron Shift.
- Authors
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.
- Subjects
BLACK holes; ORBITS (Astronomy); ELLIPTICAL orbits; STARS; SPIN (Aerodynamics)
- Publication
Universe (2218-1997), 2021, Vol 7, Issue 10, p1
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe7100364