Ultraviolet spectral morphology of the O stars. III - The ON and OC stars

Details Ultraviolet spectral morphology of the O stars. III - The ON and OC stars Ultraviolet spectral morphology of the O stars. III - The ON and OC stars

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...291..806w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 291, April 15, 1985, p. 806-811.

Astronomy and Astrophysics

Astrophysics

35

O Stars, Peculiar Stars, Stellar Composition, Stellar Spectra, Stellar Winds, Ultraviolet Spectra, Abundance, Dwarf Stars, Iue, Photosphere, Resonance Lines, Supergiant Stars

Scientific paper

Key regions in the 1200-1900-A spectra of two ON dwarfs and four ON/OC supergiants are illustrated and discussed, using high-resolution data from the International Ultraviolet Explorer archives. Marked anomalies are displayed by both stellar wind and photospheric C and N features, relative to the consistent framework provided by normal ultraviolet O-type spectra. Hence these peculiar objects provide a further example of close correspondence between optical spectral classifications and ultraviolet spectral features, as well as between photospheric and wind properties. The opposite departures from normal behavior of the N-versus-C features strongly suggest an origin in abundance effects.

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