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The IPoP method to measure Cepheid distances

Published online by Cambridge University Press:  18 February 2014

J. Breitfelder ,
A. Mérand ,
P. Kervella  and
A. Gallenne
J. Breitfelder
Affiliation:
European Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Santiago 19, Chile email: jbreitfe@eso.org LESIA, Observatoire de Paris, CNRS UMR 8109, UPMC, Université Paris Diderot, 5 place Jules Janssen, 92195 Meudon, France
A. Mérand
Affiliation:
European Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Santiago 19, Chile email: jbreitfe@eso.org
P. Kervella
Affiliation:
LESIA, Observatoire de Paris, CNRS UMR 8109, UPMC, Université Paris Diderot, 5 place Jules Janssen, 92195 Meudon, France
A. Gallenne
Affiliation:
Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile
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Abstract

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Cepheids are one of the most famous standard candles used to calibrate the Galactic distance scale. However, it is fundamental to develop and test independent tools to measure their distances, in order to reach a better calibration of their period-luminosity (P-L) relationship. We present here the first results obtained with the Integrated Parallax of Pulsation (IPoP) method, an extension of the classical Baade-Wesselink method that derives the distance by making a global modelisation of all the available data. With this method we aim to reach a 2% accuracy on distance measurements.

Cepheid masses are also an essential key for our comprehension of those objects. We briefly present an original approach to derive observational constraint on Cepheid masses. Unfortunately, it does not lead to promising results.

Keywords

gravitationstars: fundamental parametersstars: variables: Cepheids
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 389 - 390
Copyright
Copyright © International Astronomical Union 2014 

References

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