The Period-Luminosity Relation of RR Lyrae Stars in the SDSS Photometric System
arXiv:0805.3704 · doi:10.1086/591231
Abstract
We provide the first detailed study of the RR Lyrae period-luminosity (PL) relation in the ugriz bandpasses of the Sloan Digital Sky Survey (SDSS) filter system. We argue that tight, simple PL relations are not present in the SDSS filters, except for the redder bandpasses i and (especially) z. However, for all bandpasses, we show that, by incorporating terms involving a (fairly reddening-independent) "pseudo-color" C_0 = (u-g)_0 - (g-r)_0, tight (non-linear) relations do obtain. We provide theoretically calibrated such relations in the present paper, which should be useful to derive precise absolute magnitudes (hence distances) and intrinsic colors (hence reddening values) to even {\em individual} field RR Lyrae stars. For applications to cases where photometry in all five passbands may not be available, we also provide simple (though less precise) average PL relations for the i and z bandpasses, which read as follows: M_z = 0.839 - 1.295 log P + 0.211 log Z, M_i = 0.908 - 1.035 log P + 0.220 log Z. Similarly, simple period-color relations for (r-i)_0, (g-r)_0, and (u-z)_0 are also provided.
7 pages, 9 figures. ApJS, in press
References in corpus (5)
- Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions
- Variable Stars in the Newly Discovered Milky Way Dwarf Spheroidal Satellite Canes Venatici I
- On the newly discovered Canes Venatici II dSph galaxy
- Computation of the Fourier parameters of RR Lyrae stars by template fitting
- Predicted properties of RR Lyrae stars in the SDSS photometric system
Cited by in corpus (7)
- Mapping the Tidal Disruption of the Hercules Dwarf: A Wide-Field DECam Imaging Search for RR Lyrae Stars
- The Outer Halo of the Milky Way as Probed by RR Lyr Variables from the Palomar Transient Facility
- RR Lyrae in XSTPS: The halo density profile in the North Galactic Cap
- Absolute Magnitudes and Colors of RR Lyrae stars in DECam Passbands from Photometry of the Globular Cluster M5
- Serendipitous discovery of RR Lyrae stars in the Leo V ultra-faint galaxy
- Disentangling the Virgo Overdensity with RR Lyrae stars
- Period-Color and Amplitude-Color Relations at Maximum and Minimum Light for RR Lyrae Stars in the SDSS Stripe 82 Region