Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/571/136       DEEP Groth Strip survey. X.              (Im+, 2002)

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
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 (zspec) 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 68 145 Quantitatively Selected E/S0s in the Groth Strip
See also: J/ApJS/142/1 : DEEP Groth Strip survey. II (Simard+, 2002) J/ApJ/599/1006 : DEEP Groth Strip Survey. VII (Kobulnicky+, 2003) J/ApJS/157/175 : DEEP Groth Strip Survey. VIII (Koo+, 2005) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- [ISF2002] GSS E/S0s galaxy identification 10- 15 F6.4 --- zphot ? Photometric redshift 17- 22 F6.4 --- zspect ? Spectroscopic redshift 24- 28 F5.2 mag Imag The I band (F814W) total magnitude 30- 34 F5.2 mag Vmag The V band (F606W) total magnitude 36- 39 F4.2 mag V-I The (V-I) color 41- 46 F6.2 mag BMag Rest frame absolute B band magnitude (see section 4.2.1) 48- 51 F4.2 --- B/T Bulge-to-total light ratio in I band (1) 53- 56 F4.2 --- R Residual parameter in I band (1) (2) 58- 62 F5.2 0.1arcsec Rad The I band half light radius 64- 67 F4.2 --- Eps Galaxy ellipticity (see section 3.8)
Note (1): The general trend is such that early-type galaxies have small R and large B/T, while late-type galaxies have large R and small B/T. Note (2): To quantify the residual images, we use the residual parameter, R, as defined by Schade et al. (1995ApJ...451L...1S, 1999ApJ...525...31S). The quantity R is called the "asymmetry parameter" in these papers, but we adopt a different name, "residual parameter," since R measures how irregular the galaxy is, how prominent the spiral arms are, and how discrepant the galaxy surface brightness distribution is from the simple bulge+disk model, in addition to mere asymmetry. See Section 3.3 of the paper for more details
History: From electronic version of the journal References: Vogt et al., Paper I 2005ApJS..159...41V Simard et al., Paper II 2002ApJS..142....1S, Cat. J/ApJS/142/1 Weiner et al., Paper III 2005ApJ...620..595W Kobulnicky et al., Paper VII 2003ApJ...599.1006K, Cat. J/ApJ/599/1006 Koo et al., Paper VIII 2005ApJS..157..175K, Cat. J/ApJS/157/175 Gebhardt et al., Paper IX 2003ApJ...597..239G Im et al. Paper X 2002ApJ...571..136I, Cat. J/ApJ/571/136 Kobulnicky et al., Paper XII 2002AAS...201.5218K
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 13-Sep-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service