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The Globular Cluster ω Centauri and its RR Lyrae Variables

Published online by Cambridge University Press:  12 April 2016

R.J. Dickens
R.J. Dickens*
Affiliation:
Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK

Abstract

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The significance of some of the unusual characteristics of the globular cluster ω Centauri in various fundamental problems is explored. Interest is centred on the properties of the cluster RR Lyraes, and what they can contribute to studies of early cluster chemical enrichment, stellar pulsation, the distance scale, stellar evolution, stellar ages and the Oosterhoff period-shift problem. This article, which is intended to highlight problems and progress rather than give a comprehensive review, includes new results based on photometry of the RR Lyraes, red giants, subgiants, horizontal-branch and main sequence stars in the cluster.

Type
2. Morphology and History of the Galaxy
Information
International Astronomical Union Colloquium , Volume 111: The Use of Pulsating Stars in Fundamental Problems of Astronomy , 1989 , pp. 141 - 167
Copyright
Copyright © Cambridge University Press 1989

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