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The Acoustic Cut-Off Frequency of roAp Stars

Published online by Cambridge University Press:  08 February 2017

N. Audard ,
F. Kupka ,
W. W. Weiss ,
P. Morel  and
J. Provost
N. Audard
Affiliation:
Institute of Astronomy, Cambridge, England
F. Kupka
Affiliation:
Institute for Astronomy, Vienna, Austria
W. W. Weiss
Affiliation:
Institute for Astronomy, Vienna, Austria
P. Morel
Affiliation:
Observatoire de la Côte d'Azur, Nice, France
J. Provost
Affiliation:
Observatoire de la Côte d'Azur, Nice, France

Extract

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For 5 out of 28 known rapidly oscillating magnetic chemically peculiar (roAp) stars, the largest observed frequency seems to exceed the theoretical acoustic cutoff frequency, which is determined by the outermost stellar regions. We show that a better modelling of the atmosphere reconciles the theory with the observations for at least the roAp star α Cir.

Type
V. Asteroseismology I
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 299 - 300
Copyright
Copyright © Kluwer 1998 

References

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