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

Details BVRI photometry of extragalactic cepheids and new insights for the distance scale BVRI photometry of extragalactic cepheids and new insights for the distance scale

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apjs...59..311f&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 59, Nov. 1985, p. 311-321.

Astronomy and Astrophysics

Astrophysics

28

Astrometry, Cepheid Variables, Magellanic Clouds, Stellar Spectrophotometry, Ubv Spectra, Charge Coupled Devices, Cosmology, Distance, Electrophotometry, Stellar Color, Stellar Luminosity

Scientific paper

The authors 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.

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