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1998A&A...330..243H - Astronomy and Astrophysics, volume 330243-252 (1998/2-1)
On the spectacular variations of Be stars. Evidence for a temporarily tilted circumstellar disk.
HUMMEL W.
Abstract (from CDS):
A new explanation for the spectacular emission line variations occuring in the Be stars γ Cas and 59 Cyg is presented. We propose a circumstellar Keplerian disk, tilted with respect to the equatorial plane. The precessing nodal and apsidal line causes a variation in the emission line widths and profile shapes. In particular the sequence of alternating shell-phases and narrow single-peak phases is proposed to be due to an apparent variation in the disk inclination.
Abstract Copyright: ∼
Journal keyword(s): line: formation - line: profiles - stars: circumstellar matter - stars: emission-line, Be - stars: individual: γ Cas - stars: individual: 59 Cyg
Simbad objects: 4
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