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Calibration of the Cepheid Distance Scale

Published online by Cambridge University Press:  15 February 2018

Wolfgang P. Gieren  and
Pascal Fouqué
Wolfgang P. Gieren
Affiliation:
Astrophysics Group, Facultad de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
Pascal Fouqué
Affiliation:
Astrophysics Group, Facultad de Física, Pontificia Universidad Católica de Chile, Santiago, Chile Observatoire de Meudon, Paris, France

Abstract

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The absolute calibration of the Cepheid period-luminosity (PL) relation with galactic Cepheids is discussed. Various methods, most importantly the cluster ZAMS-fitting scale and the Baade-Wesselink scale are found to yield PL zero points which agree within ∼ ± 0.1 mag. The present Cepheid calibration sets the Large Magellanic Cloud at μ0 (LMC) = 18.6 ± 0.1 mag, in good agreement with the distance derived from SN 1987A and other methods except RR Lyrae stars which seem to give a shorter distance scale.

Type
Variable Stars as Distance Indicators
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 72 - 80
Copyright
Copyright © Cambridge University Press 1993

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