2011ApJ...738...65T


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST08:18:45

2011ApJ...738...65T - Astrophys. J., 738, 65 (2011/September-1)

A census of mid-infrared-selected active galactic nuclei in massive galaxy clusters at 0 ≲ z ≲ 1.3.

TOMCZAK A.R., TRAN K.-V.H. and SAINTONGE A.

Abstract (from CDS):

We conduct a deep mid-infrared (mid-IR) census of nine massive galaxy clusters at (0 < z < 1.3) with a total of ∼1500 spectroscopically confirmed member galaxies using Spitzer/IRAC photometry and established mid-IR color selection techniques. Of the 949 cluster galaxies that are detected in at least three of the four IRAC channels at the ≥ 3σ level, we identify 12 that host mid-IR-selected active galactic nuclei (IR-AGNs). To compare the IR-AGNs across our redshift range, we define two complete samples of cluster galaxies: (1) optically selected members with rest-frame VABmagnitude < - 21.5 and (2) mid-IR-selected members brighter than (M*3.6+ 0.5), i.e., essentially a stellar mass cut. In both samples, we measure fIR–AGN∼ 1% with a strong upper limit of ∼3% at z < 1. This uniformly low IR-AGN fraction at z < 1 is surprising given that the fraction of 24 µm sources in the same galaxy clusters is observed to increase by about a factor of four from z ∼ 0 to z ∼ 1; this indicates that most of the detected 24 µm flux is due to star formation. Only in our single galaxy cluster at z = 1.24 is the IR-AGN fraction measurably higher at ∼15% (all members; ∼70% for late-types only). In agreement with recent studies, we find that the cluster IR-AGNs are predominantly hosted by late-type galaxies with blue optical colors, i.e., members with recent/ongoing star formation. The four brightest IR-AGNs are also X-ray sources; these IR+X-ray AGNs all lie outside the cluster core (Rproj ≳ 0.5 Mpc) and are hosted by highly morphologically disturbed members. Although our sample is limited, our results suggest that fIR–AGN in massive galaxy clusters is not strongly correlated with star formation at z < 1 and that IR-AGNs have a more prominent role at z ≳ 1.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: clusters: general - Galaxy: evolution - infrared: galaxies

Status at CDS:  

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ClG 0021+0406 ClG 00 23 52 +04 23.1           ~ 47 0
2 ZwCl 0024+1652 ClG 00 26 36.0 +17 08 36     18.35     ~ 603 1
3 ClG J0152-1358 ClG 01 52 41.3 -13 58 13           ~ 241 3
4 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 328 0
5 ACO 689 ClG 08 37 29 +14 59.5           ~ 47 0
6 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5310 6
7 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 449 0
8 NGC 4429 GiG 12 27 26.5039638243 +11 06 27.581567094   11.4       ~ 279 0
9 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
10 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1774 3
11 NGC 4874 LIN 12 59 35.709 +27 57 33.80 13.01 13.7 11.40 12.122 11.386 ~ 711 3
12 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4186 2
13 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1017 0
14 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 348 0
15 NAME NOAO Deep Wide Field reg 14 32 05.75 +34 16 47.5           ~ 323 0
16 HD 165459 * 18 02 30.7410086899 +58 37 38.157415821   6.98 6.86   6.70 A1V 32 0
17 ClG 2053-04 ClG 20 56 21.2 -04 37 46   21.0       ~ 162 0

    Equat.    Gal    SGal    Ecl

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2020.05.27-08:18:45

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