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On the Interpretation of RR Lyrae Properties in Globular Clusters and in Other Population II Systems

Published online by Cambridge University Press:  12 April 2016

V. Castellani ,
P. Giannone  and
A. Renzini
V. Castellani
Affiliation:
Istituto di Fisica, Università di Roma; Laboratorio di Astrofisica Spaziale, Frascati, Italy
P. Giannone
Affiliation:
Osservatorio Astronomico, Roma, Italy
A. Renzini
Affiliation:
Osservatorio Astronomico, Bologna, Italy

Abstract

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The differences in observational parameters of the RR Lyrae variables and horizontal branch stars of globular clusters and other population II systems are considered. A discontinuous behaviour of some parameters is outlined. The Oosterhoff dichotomy and the HB morphology are discussed with regard to a conjecture of mass loss in the pre-HB phase.

Type
Part IV / Theoretical Considerations of Population II Variables
Information
International Astronomical Union Colloquium , Volume 21: Variable Stars in Globular Clusters and in Related Systems , August 1973 , pp. 197 - 206
Copyright
Copyright © Reidel 1973

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