Original scientific paper

Periastron shift in the orbit of a particle orbiting a Kerr black hole

S. B. Faruque ; Department of Physics, Shah Jalal University of Science and Technology, Sylhet 3114, Bangladesh
Sh. Huda ; Department of Physics, Shah Jalal University of Science and Technology, Sylhet 3114, Bangladesh

Abstract

In this paper, we present a simple calculation of periastron shift in the orbit of a test particle in the Kerr field. We differentiate the prograde and retrograde orbits by the orbital angular momentum of the test particle. The orbit equations are then clearly different for the two types of motion. The calculated periastron shift is larger in a retrograde orbit than in a prograde orbit, a fact confirming previous results. We compare the difference between periastron shifts in the two types of motion with the results of Esteban and Diaz who used elliptic integrals to calculate the shift.

Keywords

periastron shift; Kerr field; prograde and retrograde orbits

Hrčak ID:

304365

URI

https://hrcak.srce.hr/304365

Publication date:

2.8.2006.

Article data in other languages: croatian

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