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Astron. Astrophys. 318, 797-804 (1997)

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Cepheid radii and the CORS method revisited

V. Ripepi 1, F. Barone 2, L. Milano 2 and G. Russo 1, 3

1 Dipartimento di Fisica, Università della Calabria, I-87036 Arcavacata di Rende (CS) Italy
2 Dipartimento di Scienze Fisiche, Università di Napoli Federico II, pad. 20 Mostra d'Oltremare, I-80125 Napoli, Italy
3 INFN, Gruppo collegato di Cosenza, Dipartimento di Fisica, I-87036 Arcavacata di Rende (CS) Italy Affiliated to Osservatorio Astronomico di Capodimonte, Napoli.

Received 22 December 1995 / Accepted 17 May 1996


We have refined the CORS method, introduced in 1980 for the computation of the cepheid radii, in order to extend its applicability to recent and extensive sets of observations. The refinement is based on the computation, from observational data only, of one of the terms of the solving equation, previously based only on precise calibrations of photometric colors. A limited number of assumptions, generally accepted in the literature, is used.

New radii are computed for about 70 cepheids, and the resulting P-R relation is discussed. [FORMULA]

Key words: stars: distances – stars: oscillations – stars: fundamental parameters – stars: cepheids

Send offprint requests to: G. Russo Table 2 is also available at the CDS via anonymous ftp or via...

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© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998