VAHEDI, Ali, Jafar KHODAGHOLIZADEH and Arman TURSUNOV. Aschenbach effect for spinning particles in Kerr-(A)dS spacetime. European Physical Journal C. New York (USA): SPRINGER, 2021, vol. 81, No 4, p. "280-1"-"280-15", 15 pp. ISSN 1434-6044. Available from: https://dx.doi.org/10.1140/epjc/s10052-021-09081-0.
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Basic information
Original name Aschenbach effect for spinning particles in Kerr-(A)dS spacetime
Authors VAHEDI, Ali, Jafar KHODAGHOLIZADEH and Arman TURSUNOV (860 Uzbekistan, belonging to the institution).
Edition European Physical Journal C, New York (USA), SPRINGER, 2021, 1434-6044.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19630/21:A0000161
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.1140/epjc/s10052-021-09081-0
UT WoS 000636734500005
Keywords in English QUASI-PERIODIC OSCILLATIONS;BLACK-HOLES;COSMOLOGICAL CONSTANT;ORBITAL RESONANCE;KERR;MOTION;FIELD;MASS;ACCRETION;MOMENTUM
Tags 2022, FÚ, RIV22
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 15/3/2022 15:33.
Abstract
A non-monotonic behavior of the velocity gradient of a test particle revolving around a rapidly rotating black hole in the locally non-rotating frame of reference is known as the Aschenbach effect. This effect can serve as a distinguishing signature of rapidly rotating black holes, being potentially useful for the measurements of the astrophysical black hole spins. This paper is the generalization of our previous research to the motion of spinning particles around a rotating black hole with non-zero cosmological constant. We show that both the particle's spin s and the cosmological constant Lambda modify the critical value of the black hole spin ac, for which the Aschenbach effect can be observed; ac can increase or decrease depending on the signs of s and Lambda. We also found that the particle's spin s can mimic the effect of the cosmological constant Lambda for a given ac, causing thus a discrepancy in the measurements of s, Lambda and ac in the Aschenbach effect.
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