Color-density relation in the low z sample of the SDSS DR10

 

Xin-Fa Deng

 

School ol Science, Nanchang University, Jiangxi, China, 330031 (xinfadeng@163.com).

 

Received Agust 25 2014.
Accepted December 10 2014.

 

RESUMEN

El objetivo de este estudio es examinar la dependencia ambiental de los colores u - r, u - g, g - r, r - i e i - z en la muestra de baja z del Sloan Digital Sky Survey Data Release 10 (SDSS DR10). Para disminuir el efecto de selección radial, divido la muestra de baja z en submuestras agrupadas en intervalos de ∆z=0.01 y analizo la dependencia ambiental de los colores para estas submuestras en cada intervalo de corrimiento al rojo. Los resultados estadísticos indican que los cinco colores de la muestra de baja z están levemente correlacionados con las propiedades ambientales locales, lo cual coincide con lo encontrado para galaxias principales a z > 0.15 y para galaxias GMASS.

 

ABSTRACT

The aim of this study is to examine the environmental dependence of the u - r, u - g, g - r, r - i and i - z colors in the loz z sample of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10). To decrease the radial selection effect, I divide the low z sample into subsamples with a redshift binning size of ∆z=0.01 and analyze the environmental dependence of colors for these subsamples in each redshift bin. The statistical results show that all five colors of galaxies in the low z sample are weakly correlated with the local environment, which is consistent with the results of main galaxies at z > 0.15 and CMASS galaxies.

Key Words: Galaxies: fundamental parameters — galaxies: statistics.

 

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ACKNOWLEDGMENTS

I thank the anonymous referee for providing many useful comments and suggestions. This study was supported by the National Natural Science Foundation of China (NSFC, Grant 11263005).

Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy. The SDSS-III web site is http://www.sdss3.org/.

SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, University of Cambridge, University of Florida, the French Participation Group, the German Participation Group, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University.

 

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