Abstract
Using our 1997 work in spectroscopic temperatures, as well as published Cepheid photometry, we derive color-temperature relations for a set of 13 Cepheids in Galactic clusters. The colors and temperatures used are individual values taken at different phases, rather than mean values averaged over the pulsational cycle. The observed colors are corrected for both reddening and metallicity. The effect of gravity on the colors is small. We find that B-V and V-R are the best colors to use to determine a Cepheid photometric temperature scale. These color-temperature relations will be useful for future Cepheid Baade-Wesselink studies and for abundance analyses of more Galactic and extragalactic Cepheids.
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