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Cepheid distances from the Baade–Wesselink method

Published online by Cambridge University Press:  26 February 2013

Wolfgang Gieren ,
Jesper Storm ,
Nicolas Nardetto ,
Alexandre Gallenne ,
Grzegorz Pietrzyński ,
Pascal Fouqué ,
Thomas G. Barnes  and
Daniel Majaess
Wolfgang Gieren
Affiliation:
Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile email: [email protected]
Jesper Storm
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany email: [email protected]
Nicolas Nardetto
Affiliation:
Laboratoire Lagrange, UMR7293, UNS/CNRS/OCA, 06300 Nice, France
Alexandre Gallenne
Affiliation:
Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile email: [email protected]
Grzegorz Pietrzyński
Affiliation:
Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile email: [email protected]
Pascal Fouqué
Affiliation:
IRAP, Université de Toulouse, CNRS, 14 Avenue E. Belin, 31400 Toulouse, France
Thomas G. Barnes
Affiliation:
University of Texas at Austin, McDonald Observatory, 82 Mt. Locke Road, TX 79734, USA
Daniel Majaess
Affiliation:
Department of Astronomy and Physics, Saint Mary's University, Halifax, NS B3H 3C3, Canada
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Abstract

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Recent progress on Baade–Wesselink (BW)-type techniques to determine the distances to classical Cepheids is reviewed. Particular emphasis is placed on the near-infrared surface-brightness (IRSB) version of the BW method. Its most recent calibration is described and shown to be capable of yielding individual Cepheid distances accurate to 6%, including systematic uncertainties. Cepheid distances from the IRSB method are compared to those determined from open cluster zero-age main-sequence fitting for Cepheids located in Galactic open clusters, yielding excellent agreement between the IRSB and cluster Cepheid distance scales. Results for the Cepheid period–luminosity (PL) relation in near-infrared and optical bands based on IRSB distances and the question of the universality of the Cepheid PL relation are discussed. Results from other implementations of the BW method are compared to the IRSB distance scale and possible reasons for discrepancies are identified.

Keywords

Cepheidsdistance scale
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S289: Advancing the Physics of Cosmic Distances , August 2012 , pp. 138 - 144
Copyright
Copyright © International Astronomical Union 2013

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