First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in the Andromeda Galaxy

@article{Ribas2005FirstDO,
  title={First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in the Andromeda Galaxy},
  author={I. Ribas and C. Jordi and F. Vilardell and Edward L. Fitzpatrick Ron W. Hilditch and E. Guinan},
  journal={The Astrophysical Journal},
  year={2005},
  volume={635}
}
We present the first detailed spectroscopic and photometric analysis of an eclipsing binary in the Andromeda Galaxy (M31). This is a 19.3 mag semidetached system with late O and early B spectral type components. From the light and radial velocity curves we have carried out an accurate determination of the masses and radii of the components. Their effective temperatures have been estimated by modeling the absorption-line spectra. The analysis yields an essentially complete picture of the… Expand
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