Carbon and nitrogen in B2 to A2 main-sequence stars

Details Carbon and nitrogen in B2 to A2 main-sequence stars Carbon and nitrogen in B2 to A2 main-sequence stars

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..377h&link_type=abstract

In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 377-38

Astronomy and Astrophysics

Astrophysics

9

A Stars, Abundance, B Stars, Carbon, Nitrogen, Stellar Composition, Iue, Stellar Spectra, Stellar Temperature

Scientific paper

Carbon abundances are derived from the C II resonance doublet at 1335 Å in 108 main-sequence stars between 9000 and 21000K from IUE archival data. Only α Leo and ψ2Aqr are strongly carbon deficient (factors 14 and 50, resp.). The N I lines at 1493 and 1495 Å were measured in 28 sharp-lined stars below 16500K. Nitrogen anomalies are found in 5 stars, but seem uncorrelated to the C abundances. Four mechanisms for the depletion of carbon are discussed, but none is satisfactory.

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