2009•arXiv (Cornell University)Open access

Type II Cepheids as Extragalactic Distance Candles

D. Majaess, D. G. Turner, David J. Lane

Abstract

Extragalactic Type II Cepheids are tentatively identified in photometric surveys of IC 1613, M33, M101, M106, M31, NGC 4603, and the SMC. Preliminary results suggest that Type II Cepheids may play an important role as standard candles, in constraining the effects of metallicity on Cepheid parameters, and in mapping extinction.

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Key concepts: Cepheid variable, Cosmic distance ladder, Astrophysics, Extinction (optical mineralogy), Metallicity, Physics, Astronomy, Galaxy