Sloan/Johnson-Cousins/2MASS Color Transformations for Cool-Stars

Abstract

We present multi-color transformations and photometric parallaxes for a sample of 40 low mass dwarfs selected from the Sloan Digital Sky Survey (SDSS) and the General Catalog of Trigonometric Stellar Parallaxes. Our sample was re-observed at the Manastash Ridge Observatory (MRO) using both Sloan and Johnson-Cousin filters and color transformations between the two photometric systems were derived. A subset of the sample had previously measured Johnson-Cousins photometry and parallaxes as well as 2MASS photometry. We observed these stars at MRO using Sloan filters and used these data to derive photometric parallax relations as well as SDSS/Johnson-Cousins/2MASS color transformations. We present the data and derived transformations for use in future low mass star studies.

7 pages, Accepted for publication in PASP

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• The kinematics of late type stars in the solar cylinder studied with SDSS data
• The Effects of Close Companions (and Rotation) on the Magnetic Activity of M Dwarfs
• A New Low-Mass Eclipsing Binary from SDSS-II
• The M Dwarf Problem in the Galaxy
• Chi Values for Blue Emission Lines in M Dwarfs
• The Close Binary Fraction of Dwarf M Stars
• The low mass star and sub-stellar populations of the 25 Orionis group
• A search for debris disks in the Herschel ATLAS
• Improved Photometric Calibrations for Red Stars Observed with the SDSS Photometric Telescope
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