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Effects of a New Equation of State on Cepheid Pulsation Models

Published online by Cambridge University Press:  12 April 2016

S. Petroni ,
V. Castellani ,
G. Bono  and
M. Marconi
S. Petroni*
Affiliation:
Dipartimento di Fisica, Università di Pisa, Piazza Torricelli 2, 56126 Pisa, Italy
V. Castellani
Affiliation:
Dipartimento di Fisica, Università di Pisa, Piazza Torricelli 2, 56126 Pisa, Italy
G. Bono
Affiliation:
Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monte Porzio Catone, Italy
M. Marconi
Affiliation:
Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy
*
e-mail: silvia@astrlpi.difi.unipi.it

Abstract

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We present the results of several numerical experiments aimed at testing the dependence of theoretical observables predicted by Cepheid hydrodynamical models on the equation of state (EOS). We focus our attention on nonlinear and time-dependent Cepheid convective models at solar chemical composition. We find that current predictions for both the blue and red edge of the instability strip present a mild dependence on the EOS. The same outcome applies to the morphology of the lightcurves.

Type
Part 3. Nonlinear Effects in Pulsating Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 424 - 425
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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