SIMBAD references

2008ApJ...689L...9M - Astrophys. J., 689, L9-L12 (2008/December-2)

The case for hypercritical accretion in M33 X-7.

MORENO MENDEZ E., BROWN G.E., LEE C.-H. and PARK I.H.

Abstract (from CDS):

The spin parameter of the black hole in M33 X-7 has recently been measured to be a*=0.77±0.05. It has been proposed that the spin of the 15.65 M☉ black hole is natal. We show that this is not a viable evolutionary path given the observed binary orbital period of 3.45 days since the explosion that would produce a black hole with the cited spin parameter and orbital period would disrupt the binary. Furthermore, we show that the system has to be evolved through the hypercritical mass transfer of ∼5 M☉from the secondary star to the black hole.

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Journal keyword(s): Stars: Binaries: Close - Black Hole Physics - Gamma Rays: Bursts - Stars: Supernovae: General - X-Rays: Binaries

CDS comments: M33 X-7 = [LDC81] 7

Simbad objects: 7

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