Though FM Del has been considered as a RR Lyr star by Preston et al. in 1959 (following discovery by Huth, 1957), Huth (1960) eventually changed his mind by showing that it is in fact a cepheid of W Vir type of period of 3.95452 days. Various authors since then have considered it as a cepheid indeed, with the exception of Wils et al. (2006) who list this star in their RR Lyr catalog with a period of 0.79688 days. On this basis, FM Del was added to Tarot RR Lyr program. We present here these observations which confirm the cepheid type.
@article{arxiv.1407.4961,
title = {GEOS RR Lyr survey: FM Del is indeed a cepheid},
author = {Jean-Francois Le Borgne and Alain Klotz},
journal= {arXiv preprint arXiv:1407.4961},
year = {2014}
}
Comments
Published in the GEOS circulars (Groupe Europeen d'Observations Stellaires, http://geos.upv.es/)