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Infrared Light Curves of Carbon-Rich Variables

Published online by Cambridge University Press:  25 May 2016

Patricia Whitelock
Patricia Whitelock*
Affiliation:
South African Astronomical Observatory, Observatory 7935, South Africa

Abstract

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Long-term trends in the infrared (JHKL) light curves of various carbon variables are described. Some stars, e.g. the semi-regular variables R Scl and GM CMa, show multiple periodicities; others, particularly the Miras with moderately thick dust-shells, show more erratic long-term changes. The light curves for R For, which have been intensively monitored over 20 years, show a pattern which is reminiscent of that seen for R CrB stars. This pattern is superimposed on regular large-amplitude Mira pulsations. The multi-periodic and erratic behaviour of these stars is compared with the predictions from various models.

Type
Session IV — Variability
Information
Symposium - International Astronomical Union , Volume 177: The Carbon Star Phenomenon , 2000 , pp. 179 - 190
Copyright
Copyright © Kluwer 2000 

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