Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...288..558t&link_type=abstract
Astronomy and Astrophysics 288, 558-560 (1994)
Astronomy and Astrophysics
Astrophysics
42
Stars: Emission-Line, Be, Circumstellar Matter, Individual: {Beta}^1^ Mon
Scientific paper
We discuss the implications of the observations of the Be star β^1^ Mon, as presented by Cowley & Gugula (1973), for the theory of one-armed density perturbations in the equatorial discs of Be stars. This theory aims to describe the nature of the long-term (cycles of a few to several years) V/R variations of the Balmer and other emission lines of these stars (Okazaki 1991 and Papaloizou et al. 1992). From the observations of β^1^ Mon we infer that a one-armed density structure revolved around the star in the same direction as the nearly Keplerian orbits of the disc material. We conclude that these observations are consistent with a model which predicts prograde precession of a one-armed density perturbation.
Heemskerk M. H. M.
Henrichs Hubertus F.
Savonije G. J.
Telting John H.
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