Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ssrv...50..245t&link_type=abstract
(IAU, NSERC, Canadian Institute of Theoretical Astrophysics, et al., Colloquium on Algols, 107th, Sidney, Canada, Aug. 15-19, 19
Astronomy and Astrophysics
Astrophysics
4
Abundance, Eclipsing Binary Stars, Hot Stars, Mass Transfer, Noise Spectra, Signal To Noise Ratios, Balmer Series, Cyano Compounds
Scientific paper
The usefulnesss of high signal-to-noise-ratio spectra for both radial-velocity and abundance studies of Algol systems is emphasized. It is shown that division by a hot star is a worthwhile step in pursuit of this objective. A preliminary analysis of high signal-to-noise ratio, red and near-infrared, Reticon observations of R CMa shows that its primary has solar CNO abundances within the 0.3 dex observational error. The low-mass (0.17 solar mass) secondary of this Algol system must have lost a large fraction of its original mass. Some of this material would have been extensively processed during the secondary's main-sequence lifetime and would therefore have had a highly nonsolar CNO-abundance distribution. The lack of serious contamination of the primary's abundances is consistent with most, but not all, plausible mass-transfer scenarios.
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