On the radial velocity variations in Be stars

Details On the radial velocity variations in Be stars On the radial velocity variations in Be stars

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...276..409s&link_type=abstract

Astronomy and Astrophysics, Vol. 276, p. 409 (1993)

Astronomy and Astrophysics

Astrophysics

35

Hydrodynamics, Line: Profiles, Stars: Emissionline, Be, Stars: Rotation

Scientific paper

We present the results of numerical calculations of low frequency one armed density waves in a nearly Keplerian disc about a rotationally deformed Be star. For plausible values for the Be star's rotational flattening and for the disc's characteristic temperature we find slowly precessing (prograde) one armed modes with periods in the range of the observed VIR variations. Furthermore, these modes are naturally confined to a few stellar radii about the central star, like the observed cyclic VIR variations, and may well be the cause of these variations.

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