Asteroseismology and Oblique Pulsator Model of Beta Cephei

Details Asteroseismology and Oblique Pulsator Model of Beta Cephei Asteroseismology and Oblique Pulsator Model of Beta Cephei

2000-01-21

arxiv.org/abs/astro-ph/0001372v1

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures. Accepted for publication in ApJLetters

Scientific paper

10.1086/312533

We discuss the oscillation features of Beta Cephei, which is a magnetic star in which the magnetic axis seems to be oblique to the rotation axis. We interpret the observed equi-distant fine structures 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, the evolutionary stage, the rotational frequency, the magnetic field strength, and the geometrical configuration of Beta Cephei.

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