Particle emission rates from a black hole. II - Massless particles from a rotating hole

Astronomy and Astrophysics – Astronomy

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Angular Momentum, Black Holes (Astronomy), Particle Emission, Particle Flux Density, Stellar Rotation, Canonical Forms, Gravitons, Stellar Evolution, Stellar Mass, Thermal Emission

Scientific paper

Paper I by the author (1976) reported numerical calculations of the emission rates from a nonrotating black hole. The present paper gives the rates for the known particles of zero or negligible rest mass from a rotating black hole and shows how such a hole would evolve as it emitted these particles. The quantities calculated are the rates at which energy and angular momentum are radiated; the evolution of the mass, rotation parameter, and area of the hole; the lifetimes of holes with different initial angular momentum; the masses of primordial black holes (PBHs) that would be just disappearing today; and the maximum rotation parameters that PBHs of various masses today could have. The results are of interest in testing the validity of the simplifying assumption that most black holes which emit significantly today are not rotating.

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