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J/ApJ/571/136 DEEP Groth Strip survey. X. (Im+, 2002)
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Beginning of ReadMe :J/ApJ/571/136 DEEP Groth Strip survey. X. (Im+, 2002)
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The DEEP Groth Strip survey.
X. Number density and luminosity function of field E/S0 galaxies at z<1.
Im M., Simard L., Faber S.M., Koo D.C., Gebhardt K., Willmer C.N.A.,
Phillips A., Illingworth G., Vogt N.P., Sarajedini V.L.
<Astrophys. J. 571, 136 (2002)>
=2002ApJ...571..136I
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ADC_Keywords: Galaxies, photometry ; Redshifts
Keywords: cosmology: observations - galaxies: evolution -
galaxies: luminosity function, mass function
Abstract:
We present the luminosity function and color-redshift relation of a
magnitude-limited sample of 145 mostly red field E/S0 galaxies at
z< 1 from the DEEP Groth Strip Survey (GSS). Using nearby galaxy
images as a training set, we develop a quantitative method to classify
E/S0 galaxies based on smoothness, symmetry, and bulge-to-total light
ratio. Using this method, we identify 145 E/S0's at 16.5<I<22 within
the GSS, for which 44 spectroscopic redshifts (z_spec_) are available.
Most of the galaxies with spectroscopic redshifts (86%) form a "red
envelope" in the redshift-color diagram, consistent with predictions
of spectral synthesis models in which the dominant stellar population
is formed at redshifts z> 1.5.