@article {28075, title = {The Velocity Dispersion Function of Early-Type Galaxies}, journal = {The Astrophysical Journal}, volume = {594}, year = {2003}, note = {n/a}, month = {September 1, 200}, pages = {225-231}, abstract = {The distribution of early-type galaxy velocity dispersions,φ(σ), is measured using a sample drawn from the Sloan DigitalSky Survey database. Its shape differs significantly from that obtainedby simply using the mean correlation between luminosity L and velocitydispersion σ to transform the luminosity function into a velocityfunction: ignoring the scatter around the mean σ-L relation is abad approximation. An estimate of the contribution from late-typegalaxies is also made, which suggests that φ(σ) is dominatedby early-type galaxies at velocities larger than ~200 km s-1. }, url = {http://adsabs.harvard.edu/abs/2003ApJ...594..225S}, author = {Sheth, Ravi K. and Bernardi, Mariangela and Schechter, Paul L. and Burles, Scott and Eisenstein, Daniel J. and Finkbeiner, Douglas P. and Frieman, Joshua and Lupton, Robert H. and Schlegel, David J. and SubbaRao, Mark and Shimasaku, K. and Bahcall, Neta A. and Brinkmann, J. and Ivezi{\'c}, {\v Z}eljko} }