paper

Effect of gravitational radiation reaction on nonequatorial orbits around a Kerr black hole

arXiv:gr-qc/9511062 · doi:10.1103/PhysRevD.53.3064

Abstract

The effect of gravitational radiation reaction on orbits around a spinning black hole is analyzed. Such orbits possess three constants of motion: , , and , which correspond, in the Newtonian limit of the orbit being an ellipse, to the inclination angle of the orbital plane to the hole's equatorial plane, the eccentricity, and the semi-major axis length, respectively. First, it is argued that circular orbits () remain circular under gravitational radiation reaction. Second, for elliptical orbits (removing the restriction of ), the evolution of , , and is computed to leading order in (the magnitude of the spin angular momentum of the hole) and in , where is the mass of the black hole. As decreases, increases and decreases.

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