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Physical parameters for RR Lyrae stars in the sdss filter system

Published online by Cambridge University Press:  26 February 2013

Márcio Catelan ,
Gabriel I. Torrealba ,
Claudio Cáceres ,
Horace A. Smith ,
Nathan De Lee  and
Michael Fitzgerald
Márcio Catelan
Affiliation:
Departamento de Astronomía y Astrofísica, Pontificia Universidad Cat{ó}lica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: mcatelan@astro.puc.cl The Milky Way Millennium Nucleus, Santiago, Chile
Gabriel I. Torrealba
Affiliation:
Departamento de Astronomía y Astrofísica, Pontificia Universidad Cat{ó}lica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: mcatelan@astro.puc.cl The Milky Way Millennium Nucleus, Santiago, Chile
Claudio Cáceres
Affiliation:
Departamento de Astronomía y Astrofísica, Pontificia Universidad Cat{ó}lica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: mcatelan@astro.puc.cl The Milky Way Millennium Nucleus, Santiago, Chile Departamento de Física y Astronomía, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile
Horace A. Smith
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
Nathan De Lee
Affiliation:
Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA
Michael Fitzgerald
Affiliation:
Department of Physics & Astronomy, Macquarie University, NSW 2109, Australia
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Abstract

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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 ugrizsdss 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.

Keywords

stars: fundamental parametersstars: horizontal-branchstars: variables: other
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S289: Advancing the Physics of Cosmic Distances , August 2012 , pp. 126 - 129
Copyright
Copyright © International Astronomical Union 2013

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