1999A&A...352L..87N


Query : 1999A&A...352L..87N

1999A&A...352L..87N - Astronomy and Astrophysics, volume 352, L87-90 (1999/12-2)

Constraints on mass ejection in black hole formation derived from black hole X-ray binaries.

NELEMANS G., TAURIS T.M. and VAN DEN HEUVEL E.P.J.

Abstract (from CDS):

Both the recently observed high runaway velocities of Cyg X-1 (∼50km/s) and X-ray Nova Sco 1994 (≥100km/s) and the relatively low radial velocities of the black hole X-ray binaries with low mass donor stars, can be explained by symmetric mass ejection in the supernovae (SNe) which formed the black holes in these systems. Assuming symmetric mass ejection in black hole formation, we estimate the amount of mass that must have been ejected in the stellar core collapse in order to explain the velocities of the above X-ray binaries. We find that at least 2.6M and 4.1M must have been ejected in the formation of Cyg X-1 and Nova Sco, respectively. A similar mass loss fraction (f=0.35) for the black hole binaries with low mass donors, gives low velocities, in agreement with the observations. We conclude that the black holes in X-ray binaries are all consistent with being formed in a successful SN in which mass is ejected. A possible kick at the formation of the black hole is not needed to explain their space velocities.

Abstract Copyright:

Journal keyword(s): black hole physics - stars: supernovae: general - stars: binaries: close

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* V518 Per HXB 04 21 42.7227473352 +32 54 26.939156184 13.00 13.50 13.2     M4.5V 635 1
2 1A 0620-00 HXB 06 22 44.5423857312 -00 20 44.290460544 10.60 11.40 11.2     K3V-K7V 1068 0
3 V* GU Mus HXB 11 26 26.5961559600 -68 40 32.877752952           K3V-K7V 687 1
4 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1779 1
5 V* V2107 Oph HXB 17 08 14.520 -25 05 30.15   16.50 15.9     K3V-K7V 214 1
6 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4090 0
7 V* QZ Vul HXB 20 02 49.58 +25 14 11.3   19.64 18.2     K3V-K6V 405 0
8 V* V404 Cyg HXB 20 24 03.8254458776 +33 52 01.962185735           G9/K0III/V 1173 0

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2022.05.23-09:52:59

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