Journal
ASTROPHYSICAL JOURNAL
Volume 639, Issue 1, Pages L39-L42Publisher
IOP PUBLISHING LTD
DOI: 10.1086/501124
Keywords
line : formation; radiative transfer; stars : abundances; stars : early-type
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We address a long-standing discrepancy between non-LTE analyses of the prominent C II 4267 and 6578/82 angstrom multiplets in early-type stars. A comprehensive non-LTE model atom of C II is constructed based on critically selected atomic data. This model atom is used for an abundance study of six apparently slow-rotating main-sequence and giant early B-type stars. High-resolution and high S/N spectra allow us to derive highly consistent abundances not only from the classical features but also from up to 18 additional C II lines in the visual-including two so far unreported emission features equally well reproduced in non-LTE. These results require the stellar atmospheric parameters to be determined with care. A homogeneous (slightly) subsolar present-day carbon abundance from young stars in the solar vicinity ( in associations and in the field) of is indicated.
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