2003AJ....125.2427M

Query : 2003AJ....125.2427M

2003AJ....125.2427M - Astron. J., 125, 2427-2446 (2003/May-0)

Abell 2255: increased star formation and AGN activity in a cluster-cluster merger.

MILLER N.A. and OWEN F.N.

Abstract (from CDS):

Deep VLA 1.4 GHz radio continuum imaging of Abell 2255 is presented. This cluster is among the better nearby candidates for rich cluster-cluster merger systems, with evidence including an elongated X-ray morphology, the presence of a radio halo, and substructure present in its galaxy distribution. Our radio observations reach an rms sensitivity of ∼40 µJy beam–1, enabling us to detect (at 5 σ) star formation rates as low as 1.4 M☉ yr–1 from the center of the cluster out to a radial distance of 3 h–175 Mpc. The radio data are complemented by optical imaging and a large spectroscopic database, allowing us to separate all galaxies with MRc≤-20 into cluster members and foreground/background galaxies. The spectra are also used to associate the galaxies' radio emission with either star formation or active galactic nuclei (AGNs). We compare the resulting cluster radio galaxy population with those of 19 other nearby Abell clusters and find strong evidence for an increase in the frequency of radio galaxies in Abell 2255. This increase is seen in two separate types of galaxies: powerful radio AGNs and optically faint star-forming galaxies. The optical spectra of the latter often indicate current or recent starbursts, and these galaxies appear to be distributed along an axis perpendicular to the probable merger axis. We assess these factors in light of models of galaxy evolution and suggest that the cluster-cluster merger is responsible for triggering galaxy activity in Abell 2255.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Clusters: General - Galaxies: Clusters: Individual: Name: Abell 2255 - Galaxies: Evolution - Radio Continuum

VizieR on-line data: <Available at CDS (J/AJ/125/2427): table1.dat table2.dat>

Nomenclature: Tables 1, 2: [MO2003] JHHMMSS.s+DDMMSS N=46+36

Simbad objects: 105

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Number of rows : 105
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 262 ClG 01 52 50.4 +36 08 46           ~ 727 1
2 ACO 347 ClG 02 25 50 +41 52.5           ~ 149 1
3 ACO 397 ClG 02 56 58 +15 57.0           ~ 81 0
4 ACO 400 ClG 02 57 37.4 +06 00 45           ~ 408 3
5 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
6 ACO 539 ClG 05 16 35.1 +06 27 14           ~ 255 2
7 ACO 569 ClG 07 09 10.4 +48 37 10           ~ 172 1
8 ACO 634 ClG 08 14 33 +58 02.9           ~ 99 0
9 ACO 779 ClG 09 20 02.70 +33 45 29.7           ~ 261 0
10 ACO 1185 ClG 11 10 32.15 +28 35 50.4           ~ 271 1
11 ACO 1267 ClG 11 27 56 +26 51.5           ~ 54 0
12 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
13 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
14 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
15 ACO 2162 ClG 16 12 30.0 +29 32 23           ~ 149 0
16 ACO 2197 ClG 16 27 48.01 +40 58 04.5           ~ 290 0
17 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
18 ICRF J163433.8+624535 Sy2 16 34 33.80623119 +62 45 35.8960467   21.06 20.61     ~ 220 1
19 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
20 [MO2003] J170622.7+640359 rG 17 06 22.7 +64 03 59           ~ 1 0
21 2MASX J17063396+6345095 rG 17 06 33.9576729240 +63 45 09.333059580           ~ 5 0
22 SDSS J170800.56+633952.9 Sy1 17 08 00.5516816664 +63 39 52.829193780   20.19 19.45     ~ 6 0
23 UGC 10731 PaG 17 08 10.46 +63 37 51.3   13.1       ~ 18 0
24 [MO2003] J170837.8+640145 rG 17 08 37.8 +64 01 45           ~ 2 0
25 2MASX J17084516+6347464 rG 17 08 45.1243387920 +63 47 46.251604716           ~ 10 0
26 [YZJ2003] 2-249 rG 17 08 55.6285601736 +63 41 55.036882680           ~ 3 0
27 1RXS J170903.2+641731 Sy1 17 09 02.0575991784 +64 17 28.002942996   19.48 19.08     ~ 8 0
28 SHOC 562 Sy1 17 09 11.0709544632 +63 29 39.937599312     18.85     ~ 5 0
29 [VV2006] J170911.1+642209 QSO 17 09 11.1165205872 +64 22 09.718562316   20.12 19.67     ~ 21 0
30 [MO2003] J170934.8+635957 rG 17 09 34.8 +63 59 57           ~ 1 0
31 [MO2003] J170941.5+635202 rG 17 09 41.5 +63 52 02           ~ 1 0
32 [MO2003] J170956.1+644126 rG 17 09 56.1 +64 41 26           ~ 1 0
33 2MASS J17100985+6422567 QSO 17 10 09.8597006952 +64 22 56.687780388   19.17 18.52     ~ 22 0
34 [YZJ2003] 2-156 rG 17 10 10.259 +64 11 46.77           ~ 4 0
35 2MASX J17102553+6317444 rG 17 10 25.4579260584 +63 17 43.792030896           ~ 1 0
36 2MASX J17103148+6439145 H2G 17 10 31.4848391448 +64 39 14.643621036           ~ 12 0
37 2MASS J17103617+6420026 Sy2 17 10 36.175 +64 20 02.62   19.78 19.11     ~ 10 0
38 2MASX J17104448+6417025 rG 17 10 44.487 +64 17 02.58           ~ 3 0
39 LEDA 2661814 Sy2 17 10 51.1315700208 +63 51 13.300572240   19.32 18.56     ~ 13 0
40 LEDA 59755 Sy2 17 10 52.5162854160 +63 39 17.277188148   18.80 18.21     ~ 9 0
41 [YZJ2003] 2-162 rG 17 10 57.36366 +63 51 58.7861           ~ 10 0
42 2MASX J17110172+6401345 GiC 17 11 01.7177564352 +64 01 34.268537532   18.7       ~ 11 0
43 SDSS J171104.04+634242.9 GiC 17 11 04.0231480272 +63 42 43.004588616           ~ 4 0
44 2MASX J17110665+6351595 GiC 17 11 06.6303400824 +63 51 59.502695508           ~ 10 0
45 2MASX J17111709+6419194 rG 17 11 17.0736267960 +64 19 19.249320576           ~ 5 0
46 LEDA 2667121 rG 17 11 17.360 +64 20 32.35           ~ 6 0
47 [VV2003c] J171117.8+643901 Sy1 17 11 17.9 +64 39 02     19.79     ~ 1 0
48 2MASX J17112885+6358488 rG 17 11 28.9134562704 +63 58 48.646666596           ~ 6 0
49 [YZJ2003] 2-130 rG 17 11 34.44976 +63 53 38.1868           ~ 10 0
50 [MO2003] J171136.5+634445 rG 17 11 36.5 +63 44 45           ~ 1 0
51 LEDA 2665175 rG 17 11 39.60338 +64 10 06.7800           ~ 11 0
52 [YZJ2003] 2- 77 rG 17 11 45.162 +64 12 15.60           ~ 8 0
53 2MASX J17114595+6421319 rG 17 11 45.9583825584 +64 21 32.062563936   18.2       ~ 11 0
54 2MASX J17115777+6403208 GiC 17 11 57.7187827296 +64 03 20.587122108           ~ 9 0
55 2MASX J17115930+6416358 rG 17 11 59.274 +64 16 36.04           ~ 10 0
56 SDSS J171206.87+640831.9 EmG 17 12 06.8867392368 +64 08 31.757416692           ~ 11 0
57 2MASX J17121627+6402124 rG 17 12 16.2048196872 +64 02 12.380038440           ~ 14 0
58 [PVK2003] 258.09561 +64.14133 rG 17 12 22.9429637616 +64 08 28.667668020           ~ 11 0
59 [YZJ2003] 2-155 rG 17 12 23.035 +63 49 05.79           ~ 5 0
60 8C 1712+641 rG 17 12 23.8007008608 +64 02 11.388271056           ~ 19 1
61 [YZJ2003] 2- 4 Sy1 17 12 28.7195313624 +64 06 32.733727092     18.57     ~ 10 0
62 LEDA 3138983 Sy1 17 12 34.0865559648 +64 05 49.818013800           ~ 11 0
63 [YZJ2003] 2-163 rG 17 12 42.9694632720 +63 48 34.750265328           ~ 9 0
64 ZW VII 695 rG 17 12 48.3885528048 +63 42 57.977807112   18.5       ~ 14 0
65 2MASX J17125115+6404235 GiC 17 12 51.2127677448 +64 04 23.406549312   17.6       ~ 15 0
66 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
67 LEDA 59855 rG 17 13 02.0327007072 +64 03 08.331951780           ~ 11 0
68 2MASX J17130251+6410094 rG 17 13 02.3786120664 +64 10 09.459855516           ~ 11 0
69 2MASX J17130384+6407014 rG 17 13 03.7806794784 +64 07 01.673867568           ~ 32 0
70 [MO2003] J171307.4+640501 rG 17 13 07.4 +64 05 01           ~ 2 0
71 2MASX J17131541+6424178 rG 17 13 15.4378152384 +64 24 18.155204028           ~ 8 0
72 NAME Beaver Galaxy rG 17 13 16.0032670728 +63 47 37.537544544           ~ 37 1
73 [YZJ2003] 2-204 rG 17 13 19.7200271400 +63 42 16.872884136           ~ 5 0
74 2MASX J17131986+6354279 rG 17 13 19.8740223792 +63 54 28.399240296           ~ 6 0
75 [YZJ2003] 2- 63 Sy1 17 13 20.49076 +64 00 33.9971           ~ 11 0
76 7C 1713+6407b LIN 17 13 29.113 +64 02 48.73           ~ 45 2
77 [VV2006] J171330.2+644253 QSO 17 13 30.2117117232 +64 42 53.050993956   18.16 17.92     ~ 30 0
78 2MASX J17133383+6349260 rG 17 13 33.9009183960 +63 49 26.351096412           ~ 8 0
79 2MASX J17133681+6359190 Sy2 17 13 36.8656515504 +63 59 18.762940068   19.29 18.71     ~ 9 0
80 NVSS J171343+640501 rG 17 13 42.9686981760 +64 04 55.058304684           ~ 13 0
81 [YZJ2003] 4- 40 rG 17 13 43.307 +63 50 05.54           ~ 5 0
82 [YZJ2003] 2-121 Sy1 17 13 45.5176452264 +64 14 46.791968028     18.85     ~ 6 0
83 2MASX J17135110+6400130 rG 17 13 51.1936207440 +64 00 12.653103492           ~ 12 0
84 [YZJ2003] 2- 86 rG 17 13 52.0156866096 +64 07 10.310816424           ~ 9 0
85 [VV2006] J171359.5+640939 QSO 17 13 59.5171638048 +64 09 39.518696052   19.35 19.00     ~ 29 0
86 [YZJ2003] 4-186 rG 17 14 00.450 +64 05 42.00           ~ 4 0
87 2MASX J17140561+6416019 rG 17 14 05.5942046064 +64 16 01.932534084           ~ 5 0
88 2MASX J17141879+6438087 rG 17 14 18.8031944592 +64 38 08.827015776           ~ 9 0
89 2MASX J17142418+6339377 rG 17 14 24.2248276824 +63 39 37.836673596           ~ 9 0
90 SDSS J171432.71+633929.0 rG 17 14 32.73566 +63 39 29.0846           ~ 3 0
91 SDSS J171437.16+635937.3 GiC 17 14 37.163 +63 59 37.36           ~ 3 0
92 2MASX J17144742+6435408 rG 17 14 47.3818631256 +64 35 41.000319456           ~ 6 0
93 [YZJ2003] 2-230 rG 17 15 00.9741347616 +64 28 51.369668796           ~ 3 0
94 LEDA 2669705 rG 17 15 02.24947 +64 35 40.5548           ~ 7 0
95 NVSS J171508+640323 rG 17 15 09.0821100936 +64 02 53.508940656           ~ 29 1
96 [YZJ2003] 2-232 rG 17 15 29.4797889048 +63 44 52.897424208           ~ 3 0
97 6C 171514+644245 rG 17 15 30.0400474176 +64 39 51.605504244           ~ 26 1
98 2MASX J17171040+6419383 rG 17 17 10.3984758696 +64 19 38.224245648           ~ 5 0
99 LEDA 3086562 Sy1 17 17 23.8281241008 +64 17 23.676639468   17.70 16.96     ~ 11 0
100 2MASX J17180122+6422544 rG 17 18 01.1969857320 +64 22 54.238339524           ~ 5 0
101 2MASS J17181447+6417356 Sy2 17 18 14.4512004072 +64 17 35.632230648   19.22 18.52     ~ 6 0
102 2MASX J17183116+6425052 BiC 17 18 31.1480223600 +64 25 05.195329176           ~ 13 0
103 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
104 ACO 2645 ClG 23 41 17.0 -09 01 11           ~ 98 0
105 ACO 2666 ClG 23 50 56.2 +27 08 41           ~ 204 0

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