Properties of CYG X-1 Optical Component

Details Properties of CYG X-1 Optical Component Properties of CYG X-1 Optical Component

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..130k&link_type=abstract

Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We report the results of V1357Cyg optical spectral observations over 2003-2004. The comparison of observed and non-LTE model profiles for HI, HeI and MgII is given taking into account tidal distortion of Cyg X-1 optical component and its illumination by X-ray radiation of secondary one. We set restrictions on the optical component main characteristics T[eff] = 30400±500K, log g = 3.31±0.07 and overabundance of He and Mg: [He/H] = 0.43 dex, [Mg/H] = 0.59 dex. Also we found overabundances of Si, N, C and O with Al solar abundance.

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