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New period-luminosity and period-color relations of classical Cepheids
Astronomy and Astrophysics
Photometric data for 593 Cepheids in the LMC, measured by Udalski et al. in the OGLE survey, augmented by 92 longer period Cepheids from other sources, are analyzed for the P-C and P-L relations, and for the variations of amplitude, light curve shape, and period across the instability strip at constant absolute magnitude. Both the P-C and P-L relations have different slopes for periods smaller and larger than 10 days. The break at 10 days is also seen in the period-amplitude relations, and thedoi:10.1051/0004-6361:20040222 fatcat:2mk7charsjd5blfehl6dqx577y