Circumstellar material around rapidly rotating B stars. I - Nonemission-line stars

Astronomy and Astrophysics – Astronomy

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Absorption Spectra, B Stars, Line Spectra, Stellar Envelopes, Stellar Rotation, Ultraviolet Spectra, Emission Spectra, Fine Structure, Iron, Low Speed, Oxygen, Silicon, Stellar Mass Ejection, Stellar Spectrophotometry

Scientific paper

Evidence of low-velocity circumstellar material around a number of rapidly rotating nonemission-line B stars is sought. No evidence is found for circumstellar shell lines in any of the stars observed. If circumstellar material is present, then these results place constraints on the physical properties of the envelope. Furthermore, contamination of interstellar line profiles with circumstellar components in rapidly rotating non-Be stars is, in general, negligible.

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