Physical Parameters for RR Lyrae Stars in the SDSS Filter System

2); (2) Valparaiso; (3) Michigan State; (4) Vanderbilt; (5) Macquarie; Australia); C. Caceres (1; G. I. Torrealba (1); H. A. Smith (3); M. Catelan (1)

arxiv: 1301.5626 · v1 · pith:LRRZF7KTnew · submitted 2013-01-23 · 🌌 astro-ph.SR · astro-ph.GA

Physical Parameters for RR Lyrae Stars in the SDSS Filter System

M. Catelan (1) , G. I. Torrealba (1) , C. Caceres (1 , 2) , H. A. Smith (3) , N. De Lee (4) , M. Fitzgerald (5) ((1) PUC-Chile , (2) Valparaiso

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(3) Michigan State (4) Vanderbilt (5) Macquarie Australia)

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classification 🌌 astro-ph.SR astro-ph.GA

keywords sdsslyraeparametersphysicalstarssystemableaccount

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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.

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Physical Parameters for RR Lyrae Stars in the SDSS Filter System

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