2007MNRAS.381.1369G

Query : 2007MNRAS.381.1369G

2007MNRAS.381.1369G - Mon. Not. R. Astron. Soc., 381, 1369-1380 (2007/November-2)

Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field at z ∼ 0.5.

GEACH J.E., SIMPSON C., RAWLINGS S., READ A.M. and WATSON M.

Abstract (from CDS):

We present multiobject spectroscopy of galaxies in the immediate (Mpc-scale) environments of four low-power (L1.4GHz≲ 1025 W/Hz) radio galaxies at z ∼ 0.5, selected from the Subaruquest/XMM-Newton Deep Field. We use the spectra to calculate velocity dispersions and central redshifts of the groups the radio galaxies inhabit, and combined with XMM-Newton (0.3-10keV) X-ray observations investigate the LX-σv and TX-σv scaling relationships. All the radio galaxies reside in moderately rich groups - intermediate environments between poor groups and rich clusters, with remarkably similar X-ray properties. We concentrate our discussion on our best statistical example that we interpret as a low-power (Fanaroff-Riley type I) source triggered within a subgroup, which in turn is interacting with a nearby group of galaxies, containing the bulk of the X-ray emission for the system - a basic scenario which can be compared to more powerful radio sources at both high (z > 4) and low (z < 0.1) redshifts. This suggests that galaxy-galaxy interactions triggered by group mergers may play an important role in the life-cycle of radio galaxies at all epochs and luminosities.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: evolution - cosmology: observations

VizieR on-line data: <Available at CDS (J/MNRAS/381/1369): table3.dat>

Nomenclature: Table 1: [GSR2007] JEGN (Nos JEG1 to JEG4). Text, Table 3:[GSR2007] JEGN Group (Nos JEG1 Group to JEG4 Group). Table 3: [GSR2007] SXDF-iE-NNNNNN N=8, [GSR2007] SXDF-iS-NNNNNN N=38.

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [GSR2007] JEG3 Group GrG 02 17.0 -05 14           ~ 1 0
2 CANDELS UDS F160W J021724.21-051519.2 G 02 17 24.2138 -05 15 19.299   22.722 21.570 20.922   ~ 2 0
3 CANDELS UDS F160W J021725.42-051154.1 G 02 17 25.4279 -05 11 54.105   23.465 22.133 21.058   ~ 5 0
4 [GSR2007] SXDF-iS-173222 G 02 17 26.50269 -05 13 45.5779           ~ 5 0
5 ZFOURGE UDS 8600 GiC 02 17 26.838 -05 13 16.49   25.040 23.461 22.467   ~ 8 0
6 CANDELS UDS F160W J021727.47-051145.0 G 02 17 27.4795 -05 11 45.051   25.436 23.835 22.730   ~ 7 0
7 ZFOURGE UDS 8991 GiC 02 17 29.029 -05 12 59.26   23.845 22.301 21.302   ~ 11 0
8 ZFOURGE UDS 9855 GiC 02 17 31.048 -05 12 37.36   25.095 23.499 22.462   ~ 9 0
9 ZFOURGE UDS 10457 GiC 02 17 31.297 -05 12 16.71   24.341 22.920 21.853   ~ 7 0
10 [GSR2007] SXDF-iS-131866 G 02 17 31.500 -05 19 26.34           ~ 1 0
11 ZFOURGE UDS 8726 GiC 02 17 32.544 -05 12 59.55   23.697 22.295 21.306   ~ 7 0
12 SDSS J021733.26-051550.7 AGN 02 17 33.261 -05 15 50.75           ~ 12 0
13 CANDELS UDS F160W J021734.17-051339.2 AG? 02 17 34.1812 -05 13 39.221   22.4475 21.1945 20.1871   ~ 10 0
14 2XLSSd J021735.2-051325 GiC 02 17 35.289 -05 13 30.32   23.361 21.957 20.959   ~ 11 0
15 ZFOURGE UDS 6446 GiC 02 17 35.782 -05 14 20.44   24.569 23.065 22.084   ~ 8 0
16 SDSS J021737.16-051329.5 rG 02 17 37.14752 -05 13 29.5242   23.372 22.054 21.102 19.12 ~ 51 0
17 ZFOURGE UDS 6000 GiC 02 17 37.491 -05 14 30.90   24.198 22.609 21.571   ~ 9 0
18 CANDELS UDS F160W J021743.33-051330.5 GiC 02 17 43.336 -05 13 30.36   24.678 23.222 22.204   ~ 7 0
19 CANDELS UDS F160W J021746.71-051334.9 GiC 02 17 46.712 -05 13 34.78   25.125 23.715 22.775   ~ 7 0
20 [GSR2007] JEG4 Group GrG 02 18.0 -05 32           ~ 1 0
21 [GSR2007] JEG2 Group GrG 02 18.0 -05 25           ~ 1 0
22 NAME SXDSF reg 02 18 00 -05 00.0           ~ 237 1
23 SDSS J021819.05-052345.9 G 02 18 19.056 -05 23 45.94           ~ 2 0
24 [GSR2007] SXDF-iS-105254 G 02 18 19.109 -05 23 06.32           ~ 1 0
25 [GSR2007] SXDF-iS-111951 G 02 18 20.074 -05 22 14.13           ~ 1 0
26 [GSR2007] SXDF-iS-108679 G 02 18 20.374 -05 22 36.40           ~ 1 0
27 [GSR2007] SXDF-iS-087629 rG 02 18 23.5 -05 25 00   22.5712 21.3233 20.4645   ~ 9 0
28 [GSR2007] SXDF-iS-087515 G 02 18 23.777 -05 25 49.89           ~ 1 0
29 [GSR2007] SXDF-iS-090262 G 02 18 26.772 -05 25 14.35           ~ 1 0
30 [GSR2007] SXDF-iS-070840 G 02 18 27.202 -05 27 36.30           ~ 1 0
31 [GSR2007] SXDF-iS-102854 G 02 18 29.954 -05 23 30.49           ~ 1 0
32 [GSR2007] SXDF-iS-029867 G 02 18 32.484 -05 34 21.33           ~ 1 0
33 [GSR2007] SXDF-iS-049475 G 02 18 34.486 -05 31 28.97           ~ 1 0
34 [GSR2007] SXDF-iS-048741 G 02 18 35.635 -05 31 33.23           ~ 1 0
35 GAMA 1082993 rG 02 18 37.44 -05 32 49.7   21.6672 20.4941 19.4240   ~ 6 0
36 SDSS J021838.98-053238.2 QSO 02 18 38.980 -05 32 38.25           ~ 13 0
37 [GSR2007] SXDF-iS-029332 rG 02 18 40.183 -05 34 01.32   22.4187 21.1819 20.1355   ~ 3 0
38 GAMA J021842.06-053250.8 rG 02 18 42.07 -05 32 50.9   21.1884 20.1550 19.4327   ~ 6 0
39 GAMA J021842.93-053449.8 G 02 18 42.93 -05 34 49.8           ~ 4 0
40 GAMA 1082979 rG 02 18 45.78 -05 32 54.2   21.8234 20.8829 20.3953   ~ 7 0
41 [GSR2007] SXDF-iS-032022 G 02 18 48.029 -05 34 10.07           ~ 1 0
42 [GSR2007] SXDF-iS-046639 G 02 18 51.972 -05 31 49.76           ~ 1 0
43 [GSR2007] JEG1 Group GrG 02 19.0 -04 53           ~ 1 0
44 GAMA J021933.68-045145.6 G 02 19 33.68 -04 51 45.6           ~ 4 0
45 GAMA J021936.85-045330.1 G 02 19 36.86 -04 53 30.0           ~ 2 0
46 GAMA J021939.45-045318.7 G 02 19 39.46 -04 53 18.7           ~ 4 0
47 GAMA J021941.50-045230.7 BiC 02 19 41.50 -04 52 30.6           ~ 4 0
48 [GSR2007] SXDF-iE-085293 G 02 19 43.190 -04 52 43.50           ~ 1 0
49 NVSS J021945-045334 rG 02 19 45.24811 -04 53 33.2055           ~ 7 1
50 [GSR2007] SXDF-iE-089522 G 02 19 46.118 -04 51 22.25           ~ 1 0
51 [GSR2007] SXDF-iE-094234 G 02 19 48.300 -04 53 23.65           ~ 1 0

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