An empirical test for the metallicity sensitivity of the Cepheid period-luminosity relation

Details An empirical test for the metallicity sensitivity of the Cepheid period-luminosity relation An empirical test for the metallicity sensitivity of the Cepheid period-luminosity relation

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365..186f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 186-194.

Astronomy and Astrophysics

Astrophysics

293

Cepheid Variables, Metallicity, Stellar Composition, Stellar Luminosity, Andromeda Galaxy, Interstellar Extinction, Periodic Variations

Scientific paper

The results are reported of the first observational test of the sensitivity of the zero point of the Cepheid period-luminosity relation to metal abundance. BVRI time-averaged observations of Cepheids in three radially separated and chemically different fields in M31 are used to find mean reddenings and true distance moduli that differ by only 0.25 mag. Consistent distances are found for all three fields. The large observed differences in the apparent moduli can be totally attributed to different mean extinctions among the three fields.

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