Carbon abundance in Beta Persei and Lambda Tauri

Details Carbon abundance in Beta Persei and Lambda Tauri Carbon abundance in Beta Persei and Lambda Tauri

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..101c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 101-108.

Astronomy and Astrophysics

Astrophysics

15

Abundance, Carbon, Eclipsing Binary Stars, Stellar Spectra, Iue, Light Curve, Mass Transfer, Stellar Atmospheres, Stellar Interiors, Thermodynamic Equilibrium

Scientific paper

A carbon abundance analysis of two Algol-type stars is performed using IUE archival data released for general use. The primaries of Beta Per and Lambda Tau show carbon abundances equal to log N(C/H) = -3.87 + or - 0.20 and 3.88 + or - 0.20, respectively. The results should be compared with the cosmic value of -3.48 given by Allen (1973). A C-deficiency favors the generally accepted evolutionary status of Algol-type stars. The conversion of C to N by the CNO cycle is expected in stellar interiors and products of this nucleosynthesis may be exposed now in the atmospheres of stars, due to a large-scale transfer of mass between the components. However, the observed carbon abundances in Beta Per and Lambda Tau are markedly larger than those expected. A suggestion is made that a large-scale mixing of matter occurs in these stars.

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