Empirical ugri-UBVRc Transformations for Galaxies
Abstract
We present empirical color transformations between Sloan Digital Sky Survey ugri and Johnson-Cousins UBVRc photometry for nearby galaxies (D < 11 Mpc). We use the Local Volume Legacy (LVL) galaxy sample where there are 90 galaxies with overlapping observational coverage for these two filter sets. The LVL galaxy sample consists of normal, non-starbursting galaxies. We also examine how well the LVL galaxy colors are described by previous transformations derived from standard calibration stars and model-based galaxy templates. We find significant galaxy color scatter around most of the previous transformation relationships. In addition, the previous transformations show systematic offsets between transformed and observed galaxy colors which are visible in observed color-color trends. The LVL-based transformations show no systematic color offsets and reproduce the observed color-color galaxy trends.
Keywords
Cite
@article{arxiv.1408.1131,
title = {Empirical ugri-UBVRc Transformations for Galaxies},
author = {David O. Cook and Daniel A. Dale and Benjamin D. Johnson and Liese Van Zee and Janice C. Lee and Robert C. Kennicutt and Daniela Calzetti and Shawn M. Staudaher and Charles W. Engelbracht},
journal= {arXiv preprint arXiv:1408.1131},
year = {2014}
}
Comments
Accepted for publication in MNRAS (9 pages, 6 figures, 4 tables)