Physical parameters for RR Lyrae stars in the sdss filter system
Abstract
We present a calibration of the metallicity and physical parameters (temperature, luminosity, gravity, mass, radius) for RR Lyrae stars using the ugriz sdss photometric system. Our work is based on calculations of synthetic horizontal branches (HBs), fully taking into account evolutionary effects for a wide range in metallicities and HB morphologies. We provide analytical fits that are able to provide all quantities mentioned with very high (internal) precision, based solely on mean sdss magnitudes and colors.
- Publication:
-
Advancing the Physics of Cosmic Distances
- Pub Date:
- February 2013
- DOI:
- 10.1017/S1743921312021230
- arXiv:
- arXiv:1301.5626
- Bibcode:
- 2013IAUS..289..126C
- Keywords:
-
- stars: fundamental parameters;
- stars: horizontal-branch;
- stars: variables: other;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 4 pages, contributed paper, proceedings IAU Symp. 289