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Pulsating Stars and the Distance Scale - II

Published online by Cambridge University Press:  12 April 2016

Michael Feast
Michael Feast*
Affiliation:
Department of Astronomy, University of Cape Town, Private Bag, Rondebosch 7700, South Africa. (e-mail:mwf@uctvax.uct.ac.za)

Abstract

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The current Cepheid zero-point is equivalent to an LMC distance modulus of 18.57 ± 0.10. The zero-point from corrected Baade-Wesselink data is probably not significantly different from this. A reexamination of the Baade-Wesselink data for RR Lyrae variables leads to an LMC modulus of 18.51, an age difference between β- and α-group galactic globular clusters of +1.46±0.70 Gyr, and an Mv - [Fe/H] slope in agreement with theory. Other questions discussed include; Avoiding bias in using the Cepheid PL relation; Metallicity spread amongst Cepheids; Cepheids and Ho.

Type
Part 1. The Scientific Programme
Information
International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 209 - 220
Copyright
Copyright © Astronomical Society of the Pacific 1995

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