J
2021
Aschenbach effect for spinning particles in Kerr-(A)dS spacetime
VAHEDI, Ali, Jafar KHODAGHOLIZADEH and Arman TURSUNOV
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
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
United States of America
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/47813059:19630/21:A0000161
Organization unit
Institute of physics in Opava
Keywords in English
QUASI-PERIODIC OSCILLATIONS;BLACK-HOLES;COSMOLOGICAL CONSTANT;ORBITAL RESONANCE;KERR;MOTION;FIELD;MASS;ACCRETION;MOMENTUM
Tags
International impact, Reviewed
V originále
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.
Displayed: 25/12/2024 17:39