Are we observing black hole spins in jetted Gamma-Ray Bursts?

Details Are we observing black hole spins in jetted Gamma-Ray Bursts? Are we observing black hole spins in jetted Gamma-Ray Bursts?

2003-02-28

arxiv.org/abs/astro-ph/0302604v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

We note that if the GRB phenomenon follows from the collapse of a massive object forming a black hole and a torus accreting into it, the resulting ejecta can be only related to the mass and angular momentum that characterize the black hole. The opening angle of the fireball then corresponds to a black hole spin. If indeed the fireballs opening angles are as small as recent estimates reported in the literature suggest, then GRB would be produced by almost maximally rotating BH.

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