Other
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103....5m&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Jan. 1991, p. 5-19. Research supported by NSERC.
Other
59
A Stars, Main Sequence Stars, Peculiar Stars, Seismology, Stellar Oscillations, Light Curve, Magnetic Stars, Stellar Atmospheres, Stellar Magnetic Fields, Stellar Spectra, Stellar Temperature
Scientific paper
The rapidly oscillating Ap (roAp) stars currently represent the only main-sequence stars other than the sun which exhibit nonradial p-modes of very high overtone. They are ideal targets for the new techniques of asteroseismology, and although they lack the rich spectrum of modes and disk-resolved data available for the sun, analyses of roAp oscillations are yielding valuable and unique information about magnetic peculiar stars. By comparing the observed frequency spectrum to asymptotic pulsation theory and applying the Oblique Pulsator Model to the fine splitting of individual modes, it is possible to investigate a diverse range of properties of an roAp star: its radius, rotation period, and evolutionary status; the geometry and internal strength of its magnetic field; and, potentially, the detailed temperature structure of its atmosphere.
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