Confirmation of the oblique pulsator model for the rapidly oscillating Ap star HR 3831 |
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| Authors: | I K Baldry D W Kurtz & T R Bedding |
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| Institution: | Chatterton Astronomy Department, School of Physics, University of Sydney, NSW 2006, Australia,;Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa |
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| Abstract: | We have detected pulsational radial velocity variations in the rapidly oscillating Ap star HR 3831 which are amplitude- and phase-modulated in the same manner as the photometric variations. In particular, the radial velocities show the same 180° phase reversal at magnetic quadrature as the photometric variations. This confirms the oblique pulsator model, and rules out the spotted pulsator model for these stars. |
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| Keywords: | stars: chemically peculiar stars: individual: HR 3831 stars: oscillations stars: variables: other |
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