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Transformations from WISE to 2MASS, SDSS and BVI Photometric Systems: II. Transformation Equations for Red-Clump Stars

Published online by Cambridge University Press:  02 January 2013

S. Bilir ,
S. Karaali ,
N. D. Dağtekin ,
Ö. Önal ,
S. Ak ,
T. Ak  and
A. Cabrera-Lavers
S. Bilir*
Affiliation:
Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
S. Karaali
Affiliation:
Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
N. D. Dağtekin
Affiliation:
Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
Ö. Önal
Affiliation:
Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
S. Ak
Affiliation:
Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
T. Ak
Affiliation:
Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
A. Cabrera-Lavers
Affiliation:
Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain GTC Project Office, E-38205 La Laguna, Tenerife, Spain Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain
*
ECorresponding author. Email: [email protected]
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Abstract

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We present colour transformations for the conversion of Wide-Field Survey Explorer W1, W2, and W3 magnitudes to the Johnson–Cousins BVIc, Sloan Digital Sky Survey gri, and Two Micron All Sky Survey JHKs photometric systems, for red clump (RC) stars. RC stars were selected from the Third Radial Velocity Experiment Data Release. The apparent magnitudes were collected by matching the coordinates of this sample with different photometric catalogues. The final sample (355 RC stars) was used to obtain metallicitydependent and free-of-metallicity transformations. These transformations combined with known absolute magnitudes at shorter wavelengths can be used in space density determinations for the Galactic (thin and thick) discs at distances larger than the ones evaluated with JHKs photometry alone, hence providing a powerful tool in the analysis of Galactic structure.

Keywords

techniques: photometriccataloguessurveys
Type
Regular Papers
Information
Publications of the Astronomical Society of Australia , Volume 29 , Issue 2 , 2012 , pp. 121 - 131
Copyright
Copyright © Astronomical Society of Australia 2012

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