2015MNRAS.450..630S

Query : 2015MNRAS.450..630S

2015MNRAS.450..630S - Mon. Not. R. Astron. Soc., 450, 630-645 (2015/June-2)

MC2: boosted AGN and star formation activity in CIZA J2242.8+5301, a massive post-merger cluster at z = 0.19.

SOBRAL D., STROE A., DAWSON W.A., WITTMAN D., JEE M.J., ROTTGERING H., VAN WEEREN R.J. and BRUGGEN M.

Abstract (from CDS):

Cluster mergers may play a fundamental role in the formation and evolution of cluster galaxies. Stroe et al. revealed unexpected overdensities of candidate Hα emitters near the ∼ 1-Mpc-wide shock fronts of the massive ( ∼ 2x1015 M☉) `Sausage' merging cluster, CIZA J2242.8+5301. We used the Keck/Deep Imaging Multi-Object Spectrograph and the William Herschel Telescope/AutoFib2+WYFFOS to confirm 83 Hα emitters in and around the merging cluster. We find that cluster star-forming galaxies in the hottest X-ray gas and/or in the cluster subcores (away from the shock fronts) show high [Sii]6716/[Sii]6761 and high [Sii] 6716/Hα, implying very low electron densities (<30xlower than all other star-forming galaxies outside the cluster) and/or significant contribution from supernovae, respectively. All cluster star-forming galaxies near the cluster centre show evidence of significant outflows (blueshifted Na D ∼ 200-300 km/s), likely driven by supernovae. Strong outflows are also found for the cluster Hα active galactic nucleus (AGN). Hα star-forming galaxies in the merging cluster follow the z ∼ 0 mass-metallicity relation, showing systematically higher metallicity ( ∼ 0.15-0.2 dex) than Hα emitters outside the cluster (projected R > 2.5 Mpc). This suggests that the shock front may have triggered remaining metal-rich gas which galaxies were able to retain into forming stars. Our observations show that the merger of impressively massive ( ∼ 1015 M☉) clusters can provide the conditions for significant star formation and AGN activity, but, as we witness strong feedback by star-forming galaxies and AGN (and given how massive the merging cluster is), such sources will likely quench in a few 100 Myr.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: CIZA J2242.8+5301 - galaxies: evolution - intergalactic medium - cosmology: observations - large-scale structure of Universe

VizieR on-line data: <Available at CDS (J/MNRAS/450/630): table1.dat>

Nomenclature: Table 1: SSSD NN N=83 among (Nos 1-89).

Simbad objects: 87

goto Full paper

goto View the references in ADS

Number of rows : 87
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 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
2 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
3 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
4 SSSD 80 EmG 22 40 17.900 +52 50 29.70           ~ 1 0
5 SSSD 81 EmG 22 40 33.900 +53 04 04.39           ~ 1 0
6 SSSD 57 AGN 22 40 36.700 +53 11 47.49           ~ 1 0
7 SSSD 76 EmG 22 40 42.800 +53 06 43.41           ~ 1 0
8 SSSD 47 EmG 22 40 44.800 +53 10 49.59           ~ 1 0
9 SSSD 62 EmG 22 40 59.700 +52 58 31.99           ~ 1 0
10 SSSD 66 EmG 22 41 00.400 +53 01 21.09           ~ 1 0
11 SSSD 84 EmG 22 41 23.500 +53 07 57.64           ~ 1 0
12 SSSD 48 EmG 22 41 25.1652158400 +53 02 14.725801788           ~ 1 0
13 SSSD 79 EmG 22 41 27.900 +53 10 44.81           ~ 1 0
14 SSSD 67 EmG 22 41 31.400 +53 01 00.52           ~ 1 0
15 SSSD 45 AGN 22 41 34.000 +53 00 58.83           ~ 1 0
16 SSSD 72 EmG 22 41 38.100 +52 50 01.86           ~ 1 0
17 SSSD 61 AGN 22 41 39.100 +53 00 04.60           ~ 1 0
18 SSSD 59 EmG 22 41 39.400 +53 09 21.32           ~ 1 0
19 SSSD 44 EmG 22 41 40.700 +53 19 39.18           ~ 1 0
20 SSSD 43 EmG 22 41 40.900 +52 57 04.98           ~ 1 0
21 SSSD 86 AGN 22 41 49.800 +53 05 43.38           ~ 1 0
22 SSSD 58 EmG 22 41 51.300 +52 52 49.35           ~ 1 0
23 SSSD 56 EmG 22 41 59.700 +53 18 41.36           ~ 1 0
24 SSSD 64 EmG 22 42 00.800 +53 15 39.54           ~ 1 0
25 SSSD 69 EmG 22 42 01.300 +53 17 46.50           ~ 1 0
26 SSSD 83 EmG 22 42 02.500 +53 02 40.19           ~ 1 0
27 SSSD 49 EmG 22 42 07.900 +52 52 46.97           ~ 1 0
28 [DJS2015] J224209.577+525525.752 G 22 42 09.5770 +52 55 25.752           ~ 3 0
29 [DJS2015] J224215.458+525546.979 AGN 22 42 15.4580 +52 55 46.979           ~ 3 0
30 [DJS2015] J224217.301+525711.808 EmG 22 42 17.3010 +52 57 11.808           ~ 3 0
31 [DJS2015] J224217.841+525805.638 EmG 22 42 17.8410 +52 58 05.638           ~ 3 0
32 [DJS2015] J224227.927+530047.087 EmG 22 42 27.9270 +53 00 47.087           ~ 3 0
33 SSSD 42 AGN 22 42 29.700 +53 20 29.51           ~ 1 0
34 SSSD 68 EmG 22 42 32.000 +53 03 15.93           ~ 1 0
35 [DJS2015] J224232.082+530241.493 EmG 22 42 32.0820 +53 02 41.493           ~ 2 0
36 [DJS2015] J224233.728+525938.909 EmG 22 42 33.7280 +52 59 38.909           ~ 3 0
37 SSSD 75 EmG 22 42 35.300 +52 49 43.24           ~ 1 0
38 SSSD 46 AGN 22 42 35.900 +53 22 18.04           ~ 1 0
39 [DJS2015] J224235.999+525758.936 EmG 22 42 35.9990 +52 57 58.936           ~ 3 0
40 [DJS2015] J224238.363+530049.566 EmG 22 42 38.3630 +53 00 49.566           ~ 3 0
41 [DJS2015] J224239.160+530533.995 EmG 22 42 39.1600 +53 05 33.995           ~ 3 0
42 SSSD 65 EmG 22 42 39.400 +52 58 02.78           ~ 1 0
43 [DJS2015] J224241.068+525828.673 AGN 22 42 41.0680 +52 58 28.673           ~ 4 0
44 [DJS2015] J224244.009+525919.887 AGN 22 42 44.0090 +52 59 19.887           ~ 3 0
45 [DJS2015] J224245.946+525545.516 G 22 42 45.9460 +52 55 45.516           ~ 3 0
46 [DJS2015] J224245.980+525615.442 EmG 22 42 45.9800 +52 56 15.442           ~ 3 0
47 SSSD 54 EmG 22 42 46.0098408864 +52 51 22.075201800           ~ 1 0
48 [DJS2015] J224246.881+525823.940 EmG 22 42 46.8810 +52 58 23.940           ~ 3 0
49 [DJS2015] J224251.259+525422.113 EmG 22 42 51.2590 +52 54 22.113           ~ 3 0
50 [DJS2015] J224251.747+525628.753 EmG 22 42 51.7470 +52 56 28.753           ~ 3 0
51 CIZA J2242.8+5301 ClG 22 42 53.0 +53 01 05           ~ 228 0
52 [DJS2015] J224253.350+525706.073 AGN 22 42 53.3500 +52 57 06.073           ~ 4 0
53 [DJS2015] J224256.071+530524.769 EmG 22 42 56.0710 +53 05 24.769           ~ 3 0
54 [DJS2015] J224256.844+525637.964 EmG 22 42 56.8440 +52 56 37.964           ~ 3 0
55 [DJS2015] J224257.251+530238.095 EmG 22 42 57.2510 +53 02 38.095           ~ 3 0
56 [DJS2015] J224257.251+530824.517 EmG 22 42 57.2510 +53 08 24.517           ~ 3 0
57 [DJS2015] J224257.629+530514.730 EmG 22 42 57.6431507664 +53 05 14.005242024           ~ 4 0
58 [DJS2015] J224259.344+530520.318 AGN 22 42 59.3440 +53 05 20.318           ~ 3 0
59 [DJS2015] J224259.852+530214.563 EmG 22 42 59.8520 +53 02 14.563           ~ 4 0
60 [DJS2015] J224300.057+530237.952 EmG 22 43 00.0570 +53 02 37.952           ~ 3 0
61 SSSD 71 AGN 22 43 01.200 +52 49 40.98           ~ 1 0
62 [DJS2015] J224301.564+525527.346 AGN 22 43 01.5640 +52 55 27.346           ~ 3 0
63 [DJS2015] J224304.247+531012.125 G 22 43 04.2470 +53 10 12.125           ~ 3 0
64 [DJS2015] J224306.690+525831.786 EmG 22 43 06.6900 +52 58 31.786           ~ 3 0
65 [DJS2015] J224307.067+525532.520 EmG 22 43 07.0670 +52 55 32.520           ~ 3 0
66 [DJS2015] J224307.429+530842.582 G 22 43 07.4290 +53 08 42.582           ~ 3 0
67 [DJS2015] J224308.029+530158.701 EmG 22 43 08.0290 +53 01 58.701           ~ 3 0
68 [DJS2015] J224308.868+530524.730 AGN 22 43 08.8680 +53 05 24.730           ~ 4 0
69 [DJS2015] J224310.225+530544.880 EmG 22 43 10.2250 +53 05 44.880           ~ 3 0
70 SSSD 28 EmG 22 43 10.5867561192 +53 04 17.372306388           ~ 2 0
71 [DJS2015] J224311.642+530435.085 AGN 22 43 11.6420 +53 04 35.085           ~ 3 0
72 SSSD 88 EmG 22 43 12.900 +53 00 10.40           ~ 2 0
73 SSSD 50 EmG 22 43 13.100 +52 51 51.92           ~ 1 0
74 [DJS2015] J224313.597+530717.803 AGN 22 43 13.5970 +53 07 17.803           ~ 3 0
75 SSSD 55 EmG 22 43 14.600 +53 17 24.95           ~ 1 0
76 [DJS2015] J224315.061+530457.930 EmG 22 43 15.0610 +53 04 57.930           ~ 3 0
77 SSSD 77 EmG 22 43 15.800 +53 18 51.59           ~ 1 0
78 [DJS2015] J224319.020+530442.554 AGN 22 43 19.0200 +53 04 42.554           ~ 3 0
79 [DJS2015] J224323.926+530717.656 EmG 22 43 23.9260 +53 07 17.656           ~ 3 0
80 SSSD 82 EmG 22 43 26.900 +53 11 00.17           ~ 1 0
81 SSSD 51 EmG 22 43 33.500 +52 59 35.21           ~ 1 0
82 SSSD 60 EmG 22 43 39.000 +53 18 43.12           ~ 1 0
83 SSSD 41 EmG 22 43 40.400 +52 52 21.57           ~ 1 0
84 SSSD 52 EmG 22 43 40.800 +53 15 26.82           ~ 1 0
85 SSSD 87 EmG 22 43 40.900 +53 04 40.02           ~ 1 0
86 SSSD 70 EmG 22 43 44.100 +53 13 01.42           ~ 1 0
87 SSSD 73 EmG 22 43 51.000 +52 57 32.49           ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 2015MNRAS.450..630S and select 'bookmark this link' or equivalent in the popup menu