Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-10-16
Astrophys.J.629:143-157,2005
Astronomy and Astrophysics
Astrophysics
submitted to ApJ, pedagogy and bitmapped figures for presentations available at http://cosmo.nyu.edu/blanton/full_density.html
Scientific paper
10.1086/422897
We examine the relationship between environment and the luminosities, surface brightnesses, colors, and profile shapes of luminous galaxies in the Sloan Digital Sky Survey (SDSS). For the SDSS sample, galaxy color is the galaxy property most predictive of the local environment. Galaxy color and luminosity jointly comprise the most predictive pair of properties. At fixed luminosity and color, density is not closely related to surface brightness or to Sersic index -- the parameter in this study that astronomers most often associate with morphology. In the text, we discuss what measureable residual relationships exist, generally finding that at red colors and fixed luminosity, the mean density decreases at the highest surface brightnesses and Sersic indices. In general, these results suggest that the morphological properties of galaxies are less closely related to galaxy environment than are their masses and star-formation histories.
Blanton Michael R.
Brinkmann John
Eisenstein Daniel J.
Hogg David Wardell
Schlegel David James
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