RR Lyrae stars and the horizontal branch of NGC 5904 (M5)
Abstract
We report the distance and [Fe/H] value for the globular cluster NGC 5904 (M5) derived from the Fourier decomposition of the light curves of selected RRab and RRc stars. The aim in doing this was to bring these parameters into the homogeneous scales established by our previous work on numerous other globular clusters, allowing a direct comparison of the horizontal branch luminosity in clusters with a wide range of metallicities. Our CCD photometry of the large variable star population of this cluster is used to discuss light curve peculiarities, like Blazhko modulations, on an individual basis. New Blazhko variables are reported.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- May 2016
- DOI:
- 10.1007/s10509-016-2757-5
- arXiv:
- arXiv:1604.03981
- Bibcode:
- 2016Ap&SS.361..175A
- Keywords:
-
- Globular clusters: individual (NGC 5904);
- Stars: variables: RR Lyrae;
- SX Phe;
- SR;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 29, pages, 13 figures, 5 tables. Accepted in Astrophysics and Space Science. arXiv admin note: text overlap with arXiv:1506.03145