The chemical composition of the He-w BP star HR 6000

Details The chemical composition of the He-w BP star HR 6000 The chemical composition of the He-w BP star HR 6000

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...141..223c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 141, no. 1, Dec. 1984, p. 223-226.

Astronomy and Astrophysics

Astronomy

6

B Stars, Metallic Stars, Peculiar Stars, Stellar Composition, Stellar Envelopes, Ultraviolet Astronomy, Abundance, Gallium, Mercury (Metal), Scandium, Silicon, Visual Observation

Scientific paper

The abundance anomalies of the CP star HR 6000 (He-w, Te = 14,000 K, log g = 4), obtained from a previous UV analysis (Castelli et al., 1984), are compared with the optical values and with those of other peculiar stars. The slight overabundance of Ga, the strong underabundance of Sc, the doubtful presence of Hg and the very peculiar behaviour of Si make it difficult to classify this star in one of the typical CP groups. The underabundance of Si and the presence of circumstellar (or interstellar) components on the short wavelength side of the resonance lines of C II, O I, Mg II, Si II, and Fe II are discussed.

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