Carbon abundance in the primaries of six Algol-type stars

Details Carbon abundance in the primaries of six Algol-type stars Carbon abundance in the primaries of six Algol-type stars

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...214..168c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 214, no. 1-2, April 1989, p. 168-178.

Astronomy and Astrophysics

Astrophysics

18

Abundance, Carbon Stars, Eclipsing Binary Stars, Stellar Spectra, High Resolution, Line Spectra, Spectrum Analysis, Stellar Envelopes, Stellar Evolution, Symbiotic Stars

Scientific paper

The abundance analysis of carbon in six Algol-type stars was performed using IUE archival data. In order to interpret the observed spectra, both LTE and non-LTE line profiles are computed. A cosmic abundance of carbon is obtained, log N(C/H) = - 3.48, in the primary components of Delta Librae, U Sagittae, RS Vulpeculae and u Herculis. All these systems have mass ratios q greater than 0.32. In TX Ursae Majoris, log N(C/H) = - 3.73 + or - 0.20 is obtained, whereas in U Coronae Borealis (q = 0.29), log N(C/H) = - 3.89 + or - 0.20 is obtained. The result is discussed in terms of the evolutionary status of Algol-type stars.

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