Evolutionary constraints on the masses of the components of the HDE 226868/Cyg X-1 binary system

@article{Ziolkowski2003EvolutionaryCO,
  title={Evolutionary constraints on the masses of the components of the HDE 226868/Cyg X-1 binary system},
  author={Jan M. Ziolkowski},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2003},
  volume={358},
  pages={851-859}
}
  • J. Ziolkowski
  • Published 6 January 2005
  • Physics
  • Monthly Notices of the Royal Astronomical Society
Calculations carried out to model the evolution of HDE 226868, under different assumptions about the stellar wind mass-loss rate, provide robust limits on the present mass of the star. It has to be in the range 40 ± 5 M ○. if the distance to the system is in the range 1.95-2.35 kpc and the effective temperature of HDE 226868 in the range 30 000-31 000 K. Extending the possible intervals of these parameters to 1.8-2.35 kpc and 28 000-32 000 K, one gets for the mass of the star the range 40 ± 10… 

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References

SHOWING 1-10 OF 35 REFERENCES

Wind Accretion and State Transitions in Cygnus X-1

We present the results of a spectroscopic monitoring program (from 1998 to 2002) of the Hα emission strength in HDE 226868, the optical counterpart of the black hole binary Cyg X-1. The feature

The Optical Spectrum of HDE 226868=Cygnus X-1. II. Spectrophotometry and Mass Estimates

In part I of this series, Gies and Bolton (1982) have presented the results of radial velocity measures of 78 high-dispersion spectrograms of HDE 226868 = Cyg X-1. For the present study, 55 of the

The Primary orbit and the absorption-lines of HDE-226868 (Cygnus X-1)

From Reticon spectra of about 1 A resolution taken between 1980 and 1984, the radial velocity curve of HDE 226868 is found to be characteristic of a single-line spectroscopic binary with K = 75.0 +

Stellar and wind parameters of Galactic O-stars - The influence of line-blocking/blanketing

We have re-analyzed the Galactic O-star sample from [CITE] by means of line-blanketed NLTE model atmospheres in order to investigate the influence of line-blocking/blanketing on the derived

The orbital inclination of Cygnus XR-1 measured polarimetrically

The X-ray binary Cyg XR-1/HDE 226868 was observed polarimetrically over one orbit at three different optical wavelengths. The standard theory of Brown, et al. (1978) is used to derive an orbital

Do X-ray binary spectral state transition luminosities vary?

We tabulate the luminosities of the soft-to-hard state transitions of all X-ray binaries for which there exist good X-ray flux measurements at the time of the transition, good distance estimates, and

On the effective temperature scale of O stars

We rediscuss the temperature of O dwarfs based on new non-LTE line blanketed atmosphere models including stellar winds computed with the CMFGEN code of Hillier & Miller ([CITE]). Compared to the

On the Distance to Cygnus X-1 (hd 226868)

Abstract. From U, B, V photometry of 104 stars in a field of radius ~ 30' centered on the X-ray binary star Cyg X-l (HDE 226868), we have studied the color excess E(B— V) as a function of distance.

The Lyman-Continuum Fluxes and Stellar Parameters of O and Early B-Type Stars

Using the results of the most recent stellar atmosphere models applied to a sample of hot stars, we construct calibrations of effective temperature (T(sub eff)), and gravity (log(sub g)) with a

Bright OB stars in the Galaxy I. Mass-loss and wind-momentum rates of O-type stars: A pure Hα analysis accounting for line-blanketing

We study mass-loss and wind momentum rates of 29 Galactic O-type stars with luminosity classes I, III and V by means of a pure Hα profile analysis and investigate to what extent the results compare