Periodic Orbits Around Kerr Sen Black Holes*
Chang-Qing 长青 Liu 刘Department of Physics, Hunan University of Humanities Science and Technology, Loudi 417000, ChinaChi-Kun 持坤 Ding 丁Department of Physics, Hunan University of Humanities Science and Technology, Loudi 417000, ChinaJi-Liang 继良 Jing 荆Department of Physics, and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081, China
2019en
ABI
Abstract
Abstract We investigate periodic orbits and zoom-whirl behaviors around a Kerr Sen black hole with a rational number q in terms of three integers ( z , w , v ), from which one can immediately read off the number of leaves (or zooms), the ordering of the leaves, and the number of whirls. The characteristic of zoom-whirl periodic orbits is the precession of multi-leaf orbits in the strong-field regime. This feature is analogous to the counterpart in the Kerr space-time. Finally, we analyze the impact of the charge parameter b on the zoom-whirl periodic orbits. Compared to the periodic orbits around the Kerr black hole, it is found that typically lower energies are required for the same orbits in the Kerr Sen black hole.
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