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New Opacities and First Overtone Mode Cepheids

Published online by Cambridge University Press:  12 April 2016

E. Antonello
E. Antonello*
Affiliation:
Osservatorio Astronomico di Brera, Via E. Bianchi 46, 22055 Merate, Italy

Abstract

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Some results of linear adiabatic and nonlinear pulsation models of first overtone mode Cepheids are discussed. New and augmented opacities and a nonstandard mass-luminosity relation have been taken into account. The models indicate the possible importance of the resonance P1/P4 = 2 near P1 = 3 days. The resonance could explain the observed characteristics of the light curve shape of first overtone mode Cepheids.

Type
III. Models
Information
International Astronomical Union Colloquium , Volume 134: Nonlinear Phenomena in Stellar Variability , 1993 , pp. 331 - 332
Copyright
Copyright © Kluwer 1993

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