Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395l..91p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. L91-L93.
Astronomy and Astrophysics
Astrophysics
21
Barred Galaxies, Emission Spectra, H Ii Regions, Wolf-Rayet Stars, H Alpha Line, Massive Stars, Stellar Evolution, Stellar Models
Scientific paper
We report the discovery of a broad emission feature at 5696 A in a giant extragalactic H II region in the barred spiral galaxy NGC 1365, identified with a C III emission line seen in some Wolf-Rayet stars. The absence of comparable C IV emission in 5808 A implies the observed feature is from stars of WC9 subtype. This constitutes the first unequivocal detection of WC9 stars in a giant H II region and the first example of these stars outside our Galaxy. Their presence in the high-abundance environment of NGC 1365 supports the notion that late WC-type progenitors form only in "metal-rich" circumstances.
Conti Peter S.
Phillips Andrew C.
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