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The Period‐Luminosity Relation of RR Lyrae Stars in the SDSS Photometric System
- Source :
- THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Artículos CONICYT, CONICYT Chile, instacron:CONICYT, Astrophysical Journal
- Publication Year :
- 2008
- Publisher :
- American Astronomical Society, 2008.
-
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.<br />7 pages, 9 figures. ApJS, in press
- Subjects :
- Physics
media_common.quotation_subject
Astrophysics (astro-ph)
Astrophysics::Instrumentation and Methods for Astrophysics
FOS: Physical sciences
Photometric system
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
RR Lyrae variable
Photometry (optics)
Filter system
Space and Planetary Science
Sky
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Galaxy Astrophysics
media_common
Subjects
Details
- ISSN :
- 15384365 and 00670049
- Volume :
- 179
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal Supplement Series
- Accession number :
- edsair.doi.dedup.....67151db1ba274f9ef39861ea40965e68