Abstract
Published photoelectric and CCD photometric data for fundamental-mode Cepheids in the Large Magellanic Cloud are analyzed. The inferred scatter of the observed period-luminosity relation decreases with increasing quality of the light curves used. The observed scatter of the period-luminosity relations in the V and IC bands is as low as 0m.11 and 0m.07, respectively, i.e., a factor of ∼ 1.5 smaller than the lowest published estimates. This, in particular, suggests that the intrinsic scatter might be lower than previously believed.
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Berdnikov, L.N., Dambis, A.K. & Vozyakova, O.V. Period-Luminosity Relation for Classical Cepheids. Estimating the Intrinsic Scatter. Astrophysics and Space Science 252, 473–476 (1997). https://doi.org/10.1023/A:1000850314001
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DOI: https://doi.org/10.1023/A:1000850314001