engleski

Abundances from Disentangled Component Spectra: High-mass Stars in the Eclipsing Binaries CW Cep and V478 Cyg

Techniques of the spectral disentangling of the composite spectra of close binaries in combination with light-curve analysis make it possible to reconstruct individual component spectra. In an on-going project we are making photospheric elemental abundance determination for high-mass stars in OB binaries. The principal goal of the project is an observational test of rotational evolutionary stellar models of high-mass stars, and calibration of the photospheric abundance changes in terms of the stellar mass, the fractional life-time on the Main Sequence, and the rotational velocity. In the present work two more OB binaries, CW Cep and V478 Cyg, with masses of the components in the range of 12-15 M_Sun were analyzed. Results would be discussed in the context of our previous studies in this series, and compared to the theoretical predictions.

binary stars; spectroscopy; abundances

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