2008ApJ...689L...9M

Query : 2008ApJ...689L...9M

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.

Abstract Copyright: ∼

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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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME M33 X-7 HXB 01 33 34.13 +30 32 11.3 17.50 18.80 18.70     O 187 2
2 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
3 V* IL Lup HXB 15 47 08.2768672752 -47 40 10.284587760         15.624 ~ 532 1
4 V* V1033 Sco HXB 16 54 00.1423963019 -39 50 44.761701340       16.14   F3-6IV 1980 0
5 V* V4641 Sgr HXB 18 19 21.6343259256 -25 24 25.849595952     13.654 13.479 13.139 B9III 530 0
6 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
7 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0

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