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Mode Identification with Cepheid Phase-lag

Published online by Cambridge University Press:  15 August 2009

M. Goupil ,
Z. Kolláth ,
N. Nardetto ,
P. Kervella ,
R. Szabó  and
J.R. Buchler
R. Szabó
Affiliation:
Konkoly Observatory, 1525 Budapest, PO Box 67, Hungary
J.R. Buchler
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611-8440, USA
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Abstract

A large model survey with the Florida-Budapest hydrodynamical code has revisited the Cepheid phase-lag problem. A good agreement between the models and the available observational data has been found for normal amplitude Cepheids. The phase-lag is a method for mode identification that is complementary to that of Fourier decomposition coefficients. In this contribution we exploit its potential in identifying the pulsational mode of Cepheids. The possible application of the phase lag as a test for ultra-low amplitude pulsation is discussed as well.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 38: Nonlinear Pulsations and Hydrodynamics of Cepheids , 2009 , pp. 107 - 114
Copyright
© EAS, EDP Sciences, 2009

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