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Photometric Modeling of Slowly Pulsating B Stars

Published online by Cambridge University Press:  12 April 2016

R.H.D. Townsend
R.H.D. Townsend*
Affiliation:
Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT, UK

Abstract

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Highlights are presented from a theoretical study of the photometric characteristics of slowly pulsating B stars. One outstanding result is the discovery, for l ≥ 2 modes, of cancellation between the flux variations originating from surface temperature perturbations, and those arising from radius perturbations. In addition to reducing greatly the variability generated by such modes, the cancellation introduces significant phase differences between the flux changes in each passband. On the grounds that similarly-large phase differences are not seen in observational data, it is suggested that the light variations of slowly pulsating B stars might be due primarily to l = 1 modes.

Type
Part 2.2. B-Type Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 226 - 229
Copyright
Copyright © Astronomical Society of the Pacific 2002

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