2007A&A...463..853T


Query : 2007A&A...463..853T

2007A&A...463..853T - Astronomy and Astrophysics, volume 463, 853-860 (2007/3-1)

A new (2+1)D cluster finding algorithm based on photometric redshifts: large scale structure in the Chandra Deep Field South.

TREVESE D., CASTELLANO M., FONTANA A. and GIALLONGO E.

Abstract (from CDS):

We study galaxy clustering and explore the dependence of galaxy properties on the the environment up to a redshift z∼1, on the basis of a deep multi-band survey in the Chandra Deep Field South. We have developed a new method which combines galaxy angular positions and photometric redshifts to estimate the local galaxy number-density. This allows both the detection of overdensities in the galaxy distribution and the study of the properties of the galaxy population as a function of the environmental density. We detect two moderate overdensities at z∼0.7 and z∼1 previously identified spectroscopically. We find that the fraction of red galaxies within each structure increases with volume density, extending to z∼1 previous results. We measure ``red sequence'' slopes consistent with the values found in X-ray selected clusters, supporting the notion that the mass-metallicity relation hold constant up to z∼1. Our method based on photometric redshifts allows to extend structure detection and density estimates up to the limits of photometric surveys, i.e. considerably deeper than spectroscopic surveys. Since X-ray cluster detection at high redshift is presently limited to massive relaxed structures, galaxy volume density based on photometric redshift appears as a valuable tool in the study of galaxy evolution.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: evolution - galaxies: formation - galaxies: distances and redshifts - cosmology: large-scale structure of Universe

Nomenclature: Table 1: [TCF2007] N (Nos 1-3).

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 [SWM2014] GOODS-S 31996 G 03 32 06.269 -27 45 36.66   24.35   21.692 21.6372 ~ 32 0
2 [TCF2007] 3 C?G 03 32 16.510 -27 46 45.95           ~ 1 0
3 [TCF2007] 2 C?G 03 32 16.740 -27 45 52.99           ~ 1 0
4 ATCDFS J033218.01-274718.4 EmG 03 32 18.023 -27 47 18.77   21.2676   20.132 19.560 ~ 61 0
5 [FTC2015] 29 GrG 03 32 18.6 -27 47 33           ~ 8 0
6 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1962 1

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2022.08.09-03:48:50

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