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Using data of nearby galaxies from the Sloan Digital Sky Survey weinvestigate whether stellar mass, central velocity dispersion, surface massdensity, or the Sersic n parameter is best correlated with a galaxy'srest-frame color. Specifically, we determine how the mean color of galaxiesvaries with one parameter when another is fixed. When the stellar mass is fixedwe see that strong trends remain with all other parameters, whereas residualtrends are weaker when surface mass density, n, or velocity dispersion arefixed. Overall velocity dispersion is the best indicator of a galaxy's typicalcolor, showing the largest residual color dependence when any of the otherthree parameters are fixed, and stellar mass is the poorest. Other studies haveindicated that both the halo and black hole properties are better correlatedwith velocity dispersion than with stellar mass, surface mass density or Sersicn. Therefore, our results are consistent with a picture where a galaxy's starformation history and present star formation rate are determined to somesignificant degree by the current properties and assembly history of its darkmatter halo and/or the feedback from its central super massive black hole.

Revealing velocity dispersion as the best indicator of a galaxy's color, compared to stellar mass, surface mass density or morphology