TY - JOUR
T1 - The velocity dispersion function of early-type galaxies
AU - Sheth, Ravi K.
AU - Bernardi, Mariangela
AU - Schechter, Paul L.
AU - Burles, Scott
AU - Eisenstein, Daniel J.
AU - Finkbeiner, Douglas P.
AU - Frieman, Joshua
AU - Lupton, Robert H.
AU - Schlegel, David J.
AU - Subbarao, Mark
AU - Shimasaku, K.
AU - Bahcall, Neta A.
AU - Brinkmann, J.
AU - Ivezić, Zeljko
PY - 2003/9/1
Y1 - 2003/9/1
N2 - The distribution of early-type galaxy velocity dispersions, φ(σ), is measured using a sample drawn from the Sloan Digital Sky Survey database. Its shape differs significantly from that obtained by simply using the mean correlation between luminosity L and velocity dispersion σ to transform the luminosity function into a velocity function: ignoring the scatter around the mean σ-L relation is a bad approximation. An estimate of the contribution from late-type galaxies is also made, which suggests that φ(σ) is dominated by early-type galaxies at velocities larger than ∼200 km s-1.
AB - The distribution of early-type galaxy velocity dispersions, φ(σ), is measured using a sample drawn from the Sloan Digital Sky Survey database. Its shape differs significantly from that obtained by simply using the mean correlation between luminosity L and velocity dispersion σ to transform the luminosity function into a velocity function: ignoring the scatter around the mean σ-L relation is a bad approximation. An estimate of the contribution from late-type galaxies is also made, which suggests that φ(σ) is dominated by early-type galaxies at velocities larger than ∼200 km s-1.
KW - Galaxies: Stellar content
KW - Galaxies: elliptical and lenticular, cD
KW - Galaxies: evolution
KW - Galaxies: fundamental parameters
KW - Galaxies: photometry
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U2 - 10.1086/376794
DO - 10.1086/376794
M3 - Review article
AN - SCOPUS:19244369008
SN - 0004-637X
VL - 594
SP - 225
EP - 231
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1 I
ER -