2005A&A...443..231L


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET20:57:33

2005A&A...443..231L - Astronomy and Astrophysics, volume 443, 231-241 (2005/11-3)

Cygnus X-3 and the problem of the missing Wolf-Rayet X-ray binaries.

LOMMEN D., YUNGELSON L., VAN DEN HEUVEL E., NELEMANS G. and PORTEGIES ZWART S.

Abstract (from CDS):

Cygnus X-3 is a strong X-ray source (LX≃1038erg/s) which is thought to consist of a compact object accreting matter from a helium star. We analytically find that the estimated ranges of mass-loss rate and orbital-period derivative for Cyg X-3 are consistent with two models: i) the system is detached and the mass loss from the system comes from the stellar wind of a massive helium star, of which only a fraction that allows for the observed X-ray luminosity is accreted, or ii) the system is semidetached and a Roche-lobe-overflowing low- or moderate-mass helium donor transfers mass to the compact object, followed by ejection of its excess over the Eddington rate from the system. These analytical results appear to be consistent with evolutionary calculations. By means of population synthesis we find that currently in the Galaxy there may exist ∼1 X-ray binary with a black hole that accretes from a >7M Wolf-Rayet star and ∼1 X-ray binary in which a neutron star accretes matter from a Roche-lobe-overflowing helium star with mass ≲1.5M. Cyg X-3 is probably one of these systems.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - stars: individual: Cyg X-3 - stars: binaries: close - stars: binaries: general - stars: Wolf-Rayet

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1022 0
2 [MAC92] 17-A WR* 00 20 29.05 +59 16 52.3     22.5     WNE 14 0
3 NAME IC 10 X-1 HXB 00 20 29.09 +59 16 51.9           ~ 149 0
4 X LMC X-4 HXB 05 32 49.5558669817 -66 22 13.202534152   13.9 14.0     O8III 614 0
5 X LMC X-3 HXB 05 38 56.6325045489 -64 05 03.321118015   17 17.2     B2.5Ve 635 0
6 HD 104994 WR* 12 05 18.7203813373 -62 03 10.139083749 9.95 10.94 10.93 11.03   WN3p-w 156 0
7 SS 433 HXB 19 11 49.5645897700 +04 58 57.824087535   16.3 13.0     A7Ib: 1958 4
8 HD 191765 WR* 20 10 14.1929815789 +36 10 35.069005168 7.64 8.08 8.08     WN6-s 427 0
9 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 1799 2
10 EM* AS 431 WR* 20 36 43.6345223872 +40 21 07.453291511     13.73 12.51   WN8(h)+B0.5V 212 0
11 HD 197406 WR* 20 41 21.5486849958 +52 35 15.140677138 10.42 10.87 10.30     WN8h+B3IV/BH 189 0

    Equat.    Gal    SGal    Ecl

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2021.03.01-20:57:33

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