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R CrB: Photometric Evidence Regarding the Nature of its Pulsation, and a Putative Connection between Pulsation and Deep Declines

Published online by Cambridge University Press:  25 May 2016

J. D. Fernie
J. D. Fernie*
Affiliation:
David Dunlap Observatory, University of Toronto, Richmond Hill, ON Canada

Abstract

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It is shown that the historical lightcurve of R CrB contains features that argue against the deep declines being caused by pulsation. As well, recent photoelectric photometry does not show the onset of deep declines occurring at a specific phase of pulsation. The photometry suggests that only one period is present at any time, although this period can drift and/or be replaced by another period. The evidence is strong that the pulsation is radial and obeys relationships found among classical Cepheids.

Type
Session IV — Variability
Information
Symposium - International Astronomical Union , Volume 177: The Carbon Star Phenomenon , 2000 , pp. 191 - 198
Copyright
Copyright © Kluwer 2000 

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