BHBs, GRBs And Hypercritical Accretion In M33 X-7

Details BHBs, GRBs And Hypercritical Accretion In M33 X-7 BHBs, GRBs And Hypercritical Accretion In M33 X-7

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1133..109m&link_type=abstract

GAMMA-RAY BURST: Sixth Huntsville Symposium. AIP Conference Proceedings, Volume 1133, pp. 109-111 (2009).

Physics

2

Gamma-Ray Sources, Gamma-Ray Bursts, X-Ray Binaries, Galactic Nuclei, Circumnuclear Matter, And Bulges

Scientific paper

The Kerr parameter a* of the black hole (BH) in M33 X-7 has recently been measured to be a* = 0.77+/-0.05 [9]. It has been proposed that the spin of the 15.65Msolar BH is natal. We show that this is not a viable evolutionary path since the explosion that would produce a BH with the cited a* and a 3.45 days orbital period would disrupt the binary. We show that the system must have evolved through the hypercritical mass transfer of ~5Msolar from the secondary star to the BH.

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