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Astron. Astrophys. 354, 610-620 (2000)

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Theoretical models for classical Cepheids

V. Multiwavelength relations

F. Caputo 1, M. Marconi 2 and I. Musella 2

1 Osservatorio Astronomico di Roma, Via di Frascati 33, 00040 Monteporzio Catone, Italy
2 Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, Italy (caputo@coma.mporzio.astro.it; marcella@na.astro.it; ilaria@na.astro.it)

Received 23 June 1999 / Accepted 7 December 1999


From a theoretical study based on nonlinear, nonlocal and time-dependent convective pulsating models at varying mass and chemical composition, we present the predicted Period-Luminosity, Period-Color, Color-Color and Period-Luminosity-Color relations in the BVRIJK bands for Classical Cepheids. All the theoretical relations are, in various degrees, metallicity dependent and the comparison with observed data for MC and Galactic Cepheids show a fair agreement which supports the validity of the pulsating models.

Key words: stars: variables: Cepheids – stars: oscillations – stars: distances

Send offprint requests to: M. Marconi (marcella@na.astro.it)

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© European Southern Observatory (ESO) 2000

Online publication: February 9, 2000