Tidal effects away from the equatorial plane in Kerr backgrounds

Pritam Banerjee,Suvankar Paul,Rajibul Shaikh,Tapobrata Sarkar

doi:10.1016/j.physletb.2019.05.048

Pritam Banerjee, Suvankar Paul + Show 2 more

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https://doi.org/10.1016/j.physletb.2019.05.048

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Journal: Physics Letters B	Publication Date: Jun 4, 2019
Citations: 28	License type: cc-by

Affiliation: Indian Institute of Technology Kanpur

Abstract

Tidal effects on self-gravitating Newtonian stars rotating around a Kerr black hole in stable spherical orbits away from the equatorial plane are exemplified by a non-vanishing Carter's constant, and are substantially different from those on the equatorial plane. In this paper, we calculate the tidal disruption limit of the star numerically, in Fermi normal coordinates on such non-equatorial orbits, and find significant differences in the nature of tidal forces compared to equatorial orbits.

Highlights

Black holes (BHs) are known to be the most compact objects of our universe
We describe the numerical results of tidal effects away from the equatorial plane in the Kerr BH background
We have carried out an analysis of tidal effects on celestial objects in stable circular orbits away from the equatorial plane, in Kerr black hole backgrounds

Summary

Introduction

Black holes (BHs) are known to be the most compact objects of our universe. The gravitational field around their vicinity is so large that they can tidally disrupt compact objects such as neutron stars, white dwarfs etc. Tidal disruptions of stars produce some of the most fascinating astrophysical phenomena related to BHs. stellar objects that are tidally disrupted by black holes form the principal ingredients of accretion disks around them. Stellar objects that are tidally disrupted by black holes form the principal ingredients of accretion disks around them This process may give rise to a plethora of interesting phenomena with observational signatures, such as the creation of high energy gamma-ray bursts, formation of ultraviolet flare of a characteristic light-curve (see e.g [1],[2]) etc. Excellent reviews on the formation of gamma-ray bursts from BH-white dwarf mergers and BH-neutron star mergers can be found in [3] and [4], respectively (see [5])

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