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.
Cite
@article{arxiv.0909.0181,
title = {Type II Cepheids as Extragalactic Distance Candles},
author = {Daniel J. Majaess and David G. Turner and David J. Lane},
journal= {arXiv preprint arXiv:0909.0181},
year = {2009}
}