Other
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..415c&link_type=abstract
In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000,
Other
Stars: Oscillations, Stars: Chemically Peculiar, Variables
Scientific paper
The frequency of the sixth mode observed in the roAp star HR1217 cannot currently be understood in the light of the asymptotic theory for high frequency acoustic modes, valid for adiabatic pulsations in spherically symmetric stars. Deviations from adiabacity, as well as from spherical symmetry will change the frequency of the observed oscillations away from the frequencies predicted by the asymptotic theory. Among others, the presence of a magnetic field in the star will introduce such deviations from spherical symmetry, and thus influence the frequency of the oscillations observed. In the present work we inspect the effect of the magnetic field on the oscillations of HR1217 and suggest an explanation to the strange frequency of the sixth mode observed in this star.
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