Bibliographic Details
| Title: |
Metal-Poor Type II Cepheids with Periods Less Than Three Days |
| Authors: |
Kovtyukh, V., Wallerstein, G., Yegorova, I., Andrievsky, S., Korotin, S., Saviane, I., Belik, S., Davis, C. E., Farrell, E. M. |
| Publication Year: |
2018 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Solar and Stellar Astrophysics |
| More Details: |
We have analysed 10 high resolution spectra of Type II Cepheids with periods less than 3 days. We find that they clearly separate into two groups: those with near or slightly below solar metallicities, and those with [Fe/H] between --1.5 and --2.0. While the former are usually called BL~Her stars, we suggest that the latter be called UY~Eri stars. The UY~Eri subclass appears to be similar to the short period variables in globular clusters of the Galactic Halo. Globular clusters with [Fe/H] $\textgreater$ --1.0 almost never have Type II Cepheids. |
| Document Type: |
Working Paper |
| DOI: |
10.1088/1538-3873/aaacf7 |
| Access URL: |
http://arxiv.org/abs/1803.05041 |
| Accession Number: |
edsarx.1803.05041 |
| Database: |
arXiv |
