Journal Article

Environmental dependence of star formation rate, specific star formation rate and stellar mass for blue and red galaxies

Xin-Fa Deng, Yi-Qing Chen and Peng Jiang

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 417, issue 1, pages 453-457
Published in print October 2011 | ISSN: 0035-8711
Published online October 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19277.x
Environmental dependence of star formation rate, specific star formation rate and stellar mass for blue and red galaxies

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Using the two volume-limited main galaxy samples of the Sloan Digital Sky Survey Data Release 7, we explore the environmental dependence of the star formation rate (SFR), the specific star formation rate (SSFR) and the stellar mass for blue and red galaxies. It is found that the environmental dependence of the SFR, the SSFR and the stellar mass for red galaxies is still fairly strong, but the environmental dependence of these parameters for blue galaxies is very weak. Our analyses suggest that the strong environmental dependence of these parameters for red galaxies is mainly a result of the environmental dependence of these parameters in the red late-type sample. Our results also show that the SFR and the SSFR of a galaxy depend on its environment as well as its colour.

Keywords: galaxies: fundamental parameters; galaxies: statistics

Journal Article.  2716 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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