2017A&A...598A.107R


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.26CEST12:16:04

2017A&A...598A.107R - Astronomy and Astrophysics, volume 598A, 107-107 (2017/2-1)

Searching for galaxy clusters in the Kilo-Degree Survey.

RADOVICH M., PUDDU E., BELLAGAMBA F., RONCARELLI M., MOSCARDINI L., BARDELLI S., GRADO A., GETMAN F., MATURI M., HUANG Z., NAPOLITANO N., McFARLAND J., VALENTIJN E. and BILICKI M.

Abstract (from CDS):

Aims. In this paper, we present the tools used to search for galaxy clusters in the Kilo Degree Survey (KiDS), and our first results.
Methods. The cluster detection is based on an implementation of the optimal filtering technique that enables us to identify clusters as over-densities in the distribution of galaxies using their positions on the sky, magnitudes, and photometric redshifts. The contamination and completeness of the cluster catalog are derived using mock catalogs based on the data themselves. The optimal signal to noise threshold for the cluster detection is obtained by randomizing the galaxy positions and selecting the value that produces a contamination of less than 20%. Starting from a subset of clusters detected with high significance at low redshifts, we shift them to higher redshifts to estimate the completeness as a function of redshift: the average completeness is ∼85%. An estimate of the mass of the clusters is derived using the richness as a proxy.
Results. We obtained 1858 candidate clusters with redshift 0<zc<0.7 and mass 1013.5<M500<1015M in an area of 114 sq. degrees (KiDS ESO-DR2). A comparison with publicly available Sloan Digital Sky Survey (SDSS)-based cluster catalogs shows that we match more than 50% of the clusters (77% in the case of the redMaPPer catalog). We also cross-matched our cluster catalog with the Abell clusters, and clusters found by XMM and in the Planck-SZ survey; however, only a small number of them lie inside the KiDS area currently available.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: clusters: general - galaxies: distances and redshifts

VizieR on-line data: <Available at CDS (J/A+A/598/A107): clusters.dat>

Nomenclature: Table B.1: [RPB2017] KDR2 JHHMMSS.s+DDMMSS N=1543.

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 ACO 693 ClG 08 39 40 +01 04.4           ~ 11 0
2 2XMMi J084124.2+004640 ClG 08 41 24.400 +00 46 37.70           ~ 4 0
3 ACO 711 ClG 08 50 22 +00 18.8           ~ 6 0
4 ZwCl 0859-0130 ClG 09 01 29.4 -01 39 30           ~ 8 0
5 ACO 776 ClG 09 16 15 -00 23.6           ~ 10 0
6 ZwCl 0919-0016 ClG 09 22 36.8 -00 26 08           ~ 8 0
7 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 1837 0
8 NAME Leo A Supercluster SCG 11 37.4 -02 46           ~ 16 0
9 ACO 1376 ClG 11 46 06.97 -01 05 38.2           ~ 20 0
10 ACO 1386 ClG 11 48 14.22 -01 59 01.7           ~ 18 0
11 ACO 1389 ClG 11 49 07.48 -01 22 00.5           ~ 13 1
12 XMMXCS J115131.6+014814.5 ClG 11 51 31.600 +01 48 14.50           ~ 2 0
13 ACO 1411 ClG 11 55 13.63 -00 31 34.6           ~ 15 0
14 [WHL2012] J115610.8-002101 ClG 11 56 10.81 -00 21 00.8           ~ 1 0
15 ACO 1419 ClG 11 56 20.00 -00 12 20.4           ~ 17 0
16 ACO 1445 ClG 12 01 43.58 -00 11 03.8           ~ 13 0
17 PSZ1 G286.25+62.68 C?G 12 21 10.2 +00 47 34           ~ 4 0
18 ACO 1533 ClG 12 24 33.63 +00 54 22.9           ~ 10 0
19 2XMM J122527.7+004235 ClG 12 25 27.75 +00 42 35.7           ~ 6 0
20 ACO 1938 ClG 14 37 43.72 -00 18 56.1           ~ 11 0
21 XMMXCS J144811.2-002509.2 ClG 14 48 11.200 -00 25 09.20           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2019.08.26-12:16:04

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