The Evolutionary Picture of Type II Cepheids

Joonas L. O. Saario, Martin A. T. Groenewegen and Hans Van Winckel

In this paper, we present the first results of our study of the properties and evolution of Galactic Type II Cepheids. We have composed a sample of 7232 RR Lyrae (P≥0.7 d) and Cepheids from published catalogues and constructed spectral energy distributions for 3304 stars from the sample so far. Though our results are preliminary, they suggest that roughly 10 % of Type II Cepheids have near-infrared excess indicating the presence of hot dust.

Proceedings of the Polish Astronomical Society, vol. 6, 314-315 (2018)

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