Spinning test particle motion around a traversable wormhole
Benavides-Gallego C.A. Han W.-B. Malafarina D. Ahmedov B. Abdujabbarov A.
15 October 2021American Physical Society
Physical Review D
2021#104Issue 8
The motion of spinning test particles around a traversable wormhole is investigated using the Mathisson-Papapetrous-Dixon equations, which couple the Riemann tensor with the antisymmetric tensor Sαβ, related to the spin of the particle. Hence, we study the effective potential, circular orbits, and innermost stable circular orbit (ISCO) of spinning particles. We found that the spin affects significantly the location of the ISCO, in contrast with the motion of nonspinning particles, where the ISCO is the same in both the upper and lower universes. On the other hand, since the dynamical four-momentum and kinematical four-velocity of the spinning particle are not always parallel, we also consider a superluminal bound on the particles motion. In the case of circular orbits at the ISCO, we found that the motion of particles with an adimensional spin parameter lower (greater) than s=-1.5 (1.5) is forbidden. The spin interaction becomes important for Kerr black hole orbiting super massive wormholes (SMWH). The motion of spinning test particles around a rotating wormhole is in process, and we will present it in a new manuscript soon.
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Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai, 200030, China
School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, 310024, China
School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, China
International Centre for Theoretical Physics Asia-Pacific, Hangzhou, Beijing, 310024, China
Department of Physics, Nazarbayev University, 53 Kabanbay Batyr avenue, Nur-Sultan, 010000, Kazakhstan
Ulugh Beg Astronomical Institute, Astronomy St. 33, Tashkent, 100052, Uzbekistan
National University of Uzbekistan, Tashkent, 100174, Uzbekistan
Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Kori Niyoziy, 39, Tashkent, 100000, Uzbekistan
Institute of Nuclear Physics, Tashkent, 100214, Uzbekistan
Shanghai Astronomical Observatory
School of Fundamental Physics and Mathematical Sciences
School of Astronomy and Space Science
International Centre for Theoretical Physics Asia-Pacific
Department of Physics
Ulugh Beg Astronomical Institute
National University of Uzbekistan
Tashkent Institute of Irrigation and Agricultural Mechanization Engineers
Institute of Nuclear Physics
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