Asteroseismology and Oblique Pulsator Model of β Cephei
Open Access
- 10 March 2000
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 531 (2) , L143-L146
- https://doi.org/10.1086/312533
Abstract
We discuss the oscillation features of β Cephei, which is a magnetic star in which the magnetic axis seems to be oblique to the rotation axis. We interpret the observed equidistant fine structure of the frequency spectrum as a manifestation of a magnetic perturbation of an eigenmode, which would be a radial mode in the absence of the magnetic field. Besides these frequency components, we interpret another peak in the frequency spectrum as an independent quadrupole mode. By this mode identification, we deduce the mass, evolutionary stage, rotational frequency, magnetic field strength, and geometrical configuration of β Cep.Keywords
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