Massa's star, HD 93840 - A new extreme BN supergiant

Journal Article · Tue May 01 00:00:00 EDT 1990 · Publications of the Astronomical Society of the Pacific; (USA)

DOI:https://doi.org/10.1086/132667· OSTI ID:6698630

Walborn, N R; Fitzpatrick, E L; Nichols-Bohlin, J ^[1]

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1. Space Telescope Science Institute, Baltimore, MD (USA) Princeton Univ. Observatory, NJ (USA) Computer Sciences Corp., Lanham, MD (USA)

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. 21 refs.

• OSTI ID: 6698630
• Journal Information: Publications of the Astronomical Society of the Pacific; (USA), Vol. 102; ISSN 0004-6280
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SUPERGIANT STARS
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
ABSORPTION SPECTRA
ELEMENT ABUNDANCE
EMISSION SPECTROSCOPY
GALACTIC EVOLUTION
LUMINOSITY
NITROGEN
SPECTRA
STELLAR WINDS
ABUNDANCE
ELEMENTS
GIANT STARS
NONMETALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SPECTROSCOPY
STARS
STELLAR ACTIVITY
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources