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BVRI photometry of extragalactic Cepheids and new insights for the distance scale

Journal Article · · Astrophys. J., Suppl. Ser.; (United States)
DOI:https://doi.org/10.1086/191074· OSTI ID:5014849
We present new BVRI photoelectric photometry of long-period Cepheids in the Large and Small Magellanic Clouds. Period-luminosity relations based on both time-averaged and single, random-phased data are discussed, and it is shown that at wavelengths longward of the R bandpass the randomly phased data should give a spread at fixed period which is always less than the time-averaged B period-luminosity relation. Single-epoch data for five Cepheids measured in CCD exposures of a single field in M33 are used to illustrate the power of the random-phase period-luminosity relation for the Cepheid distance scale.
Research Organization:
Mount Wilson and Las Campanas Observatories, Carnegie Institution of Washington, Pasadena, California
OSTI ID:
5014849
Journal Information:
Astrophys. J., Suppl. Ser.; (United States), Journal Name: Astrophys. J., Suppl. Ser.; (United States) Vol. 59:3; ISSN APJSA
Country of Publication:
United States
Language:
English

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