The structure and evolutionary state of the bright component of V380 Cyg.

Details The structure and evolutionary state of the bright component of V380 Cyg. The structure and evolutionary state of the bright component of V380 Cyg.

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988afz....29..300d&link_type=abstract

Astrofizika, Tom 29, Vyp. 2, p. 300 - 309

Astronomy and Astrophysics

Astronomy

1

Binaries: Stellar Models, Binaries: Stellar Evolution, Binaries: Stellar Structure

Scientific paper

Data of spectroscopic and photometric observations have been analysed from the point of view of stellar structure and evolution. The parameters obtained from the line spectrum (Te = 22500K, log g = 3.4) describe the observations of the continuum spectrum in the region from 3300 Å to 10800 Å in case the distance is 1 kpc and the interstellar absorption AV = 0m.88. The apsidal coefficient is determined from apsidal motion and calculated from a theoretical model (M = 15 Msun, X = 0.7, Y = 0.28). The theoretical coefficient coincides with the observational one for the moment of ignition of hydrogen in the core of a star (the age t = 8.75.106yr, the central helium abundance Yc = 0.95). The surface chemical composition could alter the mixing between the interior and atmosphere.

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