Astronomy and Astrophysics – Astronomy
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..543w&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, May 1990, p. 543-550.
Astronomy and Astrophysics
Astronomy
11
Abundance, B Stars, Iue, Spectrograms, Stellar Spectra, Stellar Winds, Supergiant Stars, Absorption Spectra, Galactic Evolution, Nitrogen, Optical Emission Spectroscopy, Stellar Luminosity, Ultraviolet Spectroscopy
Scientific paper
New optical digital spectrograms of HD 93840 and several comparison objects are presented and discussed, together with IUE high-resolution data for the same stars. The optical observations confirm HD 93840 (BN1 Ib) as an extreme nitrogen-enhanced supergiant, as originally suggested by Massa (1989). The contrasts with HD 96248 (BC1.5 Iab) are especially striking. The rich UV stellar-wind phenomenology of these objects is discussed in some detail. The spectroscopic characteristics and intermediate galactic latitude of HD 93840 suggest a relationship to Rho Leo, and perhaps to HD 105056.
Fitzpatrick Edward L.
Nichols-Bohlin Joy
Walborn Nolan R.
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