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The Araucaria Project: the Baade-Wesselink projection factor of pulsating stars

Published online by Cambridge University Press:  18 February 2014

Nicolas Nardetto ,
Jesper Storm ,
Wolfgang Gieren ,
Grzegorz Pietrzyński  and
Ennio Poretti
Nicolas Nardetto
Affiliation:
Laboratoire Lagrange, UMR7293, Université de Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, Nice, France email: Nicolas.Nardetto@oca.eu
Jesper Storm
Affiliation:
Leibniz Institute for Astrophysics, An der Sternwarte 16, 14482, Potsdam, Germany email: jstorm@aip.de
Wolfgang Gieren
Affiliation:
Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile email: wgieren@astro-udec.cl
Grzegorz Pietrzyński
Affiliation:
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478, Warsaw, Poland email: pietrzyn@astrouw.edu.pl
Ennio Poretti
Affiliation:
INAF – Osservatorio Astronomico di Brera, Via E. Bianchi 46, 23807 Merate (LC), Italy email: ennio.poretti@brera.inaf.it
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Abstract

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The projection factor used in the Baade-Wesselink method of determining the distance of Cepheids makes the link between stellar physics and the cosmological distance scale. A coherent picture of this physical quantity is now provided based on several approaches. We present the latest news on the expected projection factor for different kinds of pulsating stars in the Hertzsprung-Russell diagram.

Keywords

stars: oscillations (including pulsations)stars: atmospheres
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 145 - 148
Copyright
Copyright © International Astronomical Union 2014 

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