2012ApJS..202....8S


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.30CET23:01:56

2012ApJS..202....8S - Astrophys. J., Suppl. Ser., 202, 8 (2012/September-0)

Post-merger signatures of red-sequence galaxies in rich Abell clusters at z ≲ 0.1.

SHEEN Y.-K., YI S.K., REE C.H. and LEE J.

Abstract (from CDS):

We have investigated the post-merger signatures of red-sequence galaxies in rich Abell clusters at z ≲ 0.1: A119, A2670, A3330, and A389. Deep images in u', g', r', and medium-resolution galaxy spectra were taken using MOSAIC II CCD and Hydra MOS mounted on a Blanco 4 m telescope at Cerro Tololo Inter-American Observatory. Post-merger features are identified by visual inspection based on asymmetric disturbed features, faint structures, discontinuous halo structures, rings, and dust lanes. We found that ∼25% of bright (Mr < -20) cluster red-sequence galaxies show post-merger signatures in four clusters consistently. Most (∼71%) of the featured galaxies were found to be bulge dominated, and for the subsample of bulge-dominated red-sequence galaxies, the post-merger fraction rises to ∼38%. We also found that roughly 4% of bulge-dominated red-sequence galaxies interact (ongoing merger). A total of 42% (38% post-merger, 4% ongoing merger) of galaxies show merger-related features. Compared to a field galaxy study with a similar limiting magnitude by van Dokkum in 2005, our cluster study presents a similar post-merger fraction but a markedly lower ongoing merger fraction. The merger fraction derived is surprisingly high for the high density of our clusters, where the fast internal motions of galaxies are thought to play a negative role in galaxy mergers. The fraction of post-merger and ongoing merger galaxies can be explained as follows. Most of the post-merger galaxies may have carried over their merger features from their previous halo environment, whereas interacting galaxies interact in the current cluster in situ. According to our semi-analytic calculation, massive cluster halos may very well have experienced tens of halo mergers over the last 4-5 Gyr; post-merger features last that long, allowing these features to be detected in our clusters today. The apparent lack of dependence of the merger fraction on the clustocentric distance is naturally explained this way. In this scenario, the galaxy morphology and properties can be properly interpreted only when the halo evolution characteristics are understood first.

Abstract Copyright:

Journal keyword(s): catalogs - galaxies: clusters: individual (A119, A2670, A3330, A389) - galaxies: evolution - galaxies: formation - galaxies: structure

Nomenclature: Table 6: [SYR2012] aNNNNsp-NNN N=68 among (Nos a119sp-0 to a119sp-57, a2670sp-0 to a2670sp-146, a3330sp-0 to a3330sp-100, a389sp-0 to a389sp-217).

Simbad objects: 73

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Number of rows : 73

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J00550506-0115093 GiC 00 55 05.0633414496 -01 15 09.342801189   16.30       ~ 16 0
2 UGC 568 LIN 00 55 08.9647347751 -01 02 47.287077868   15.45 14.75     ~ 31 0
3 MCG+00-03-028 GiC 00 55 18.867 -01 16 37.38   15.2       ~ 30 0
4 2MASX J00552294-0112398 GiC 00 55 22.940 -01 12 39.81   16.72       ~ 14 0
5 2MASX J00552527-0118318 GiC 00 55 25.2724034502 -01 18 32.033778881   15.63       ~ 18 0
6 2MASX J00554320-0102017 GiC 00 55 43.1741811893 -01 02 01.381790916   16.39       ~ 19 0
7 2MASX J00555509-0103507 GiC 00 55 55.0851155179 -01 03 50.899698873   15.69       ~ 10 0
8 4C -01.04 rG 00 56 02.697 -01 20 03.77   16.4       ~ 92 0
9 UGC 579 BiC 00 56 16.101 -01 15 19.77   14.40 14.45     ~ 66 1
10 ACO 119 ClG 00 56 16.8 -01 15 00           ~ 521 2
11 MCG+00-03-033 LIN 00 56 22.8442442757 -01 12 35.087831814   15.3       ~ 29 0
12 2MASX J00563859-0123259 EmG 00 56 38.5610681706 -01 23 25.936727163   16.44       ~ 14 0
13 UGC 588 BiC 00 57 02.050 -00 52 30.68   15.1       ~ 33 0
14 6dFGS gJ005707.0-012351 GiC 00 57 06.9573030704 -01 23 50.586466069   15.88       ~ 13 0
15 [SYR2012] a389sp-163 G 02 50 26.9 -24 49 20           ~ 1 0
16 LEDA 783701 G 02 50 43.7 -25 00 11           ~ 2 0
17 [SYR2012] a389sp-207 G 02 50 44.3 -24 55 22           ~ 1 0
18 LEDA 786367 G 02 50 44.9 -24 45 43           ~ 2 0
19 2dFGRS TGS107Z330 G 02 50 54.1 -24 45 24   18.042   16.562   ~ 3 0
20 2dFGRS TGS107Z321 G 02 50 59.6 -24 54 28   18.861   17.470   ~ 3 0
21 2MASX J02511325-2456503 GiC 02 51 13.2464985101 -24 56 50.618797012           ~ 3 0
22 LEDA 785043 G 02 51 20.0 -24 53 15           ~ 2 0
23 [SYR2012] a389sp-73 G 02 51 22.1 -24 53 27           ~ 1 0
24 2dFGRS TGS162Z149 G 02 51 22.52 -25 07 41.8   19.298   18.079   ~ 2 0
25 ACO 389 ClG 02 51 24.74 -24 56 39.5           ~ 63 0
26 6dFGS gJ025124.8-245639 GiC 02 51 24.800 -24 56 39.37   16.51   14.68   ~ 7 0
27 [FPC2000] ACO 389 30 GiC 02 51 27.55 -24 56 39.7           ~ 2 0
28 2dFGRS TGS106Z213 BiC 02 51 32.675 -25 04 23.35   16.439   14.903   ~ 9 0
29 2MASX J02513477-2502447 GiC 02 51 34.7691129876 -25 02 44.532555851           ~ 3 0
30 2dFGRS TGS107Z282 G 02 51 40.78 -24 49 30.3   19.114   17.717   ~ 2 0
31 LEDA 785417 G 02 51 46.4 -24 51 09           ~ 2 0
32 LEDA 785183 G 02 51 59.2 -24 52 31           ~ 2 0
33 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1844 1
34 LEDA 478881 G 05 14 22.2 -49 14 54           ~ 2 0
35 2MASX J05142945-4905534 GiC 05 14 29.4063503188 -49 05 53.310678748   17.33   15.90   ~ 6 0
36 2MASX J05143828-4901440 GiC 05 14 38.2918617965 -49 01 43.736488231           ~ 2 0
37 PKS J0514-4903 rG 05 14 39.494 -49 03 29.06   15.93 17.0     ~ 18 1
38 2MASX J05144640-4904411 GiC 05 14 46.3953416376 -49 04 40.881677358           ~ 2 0
39 [SYR2012] a3330sp-68 G 05 14 47.2 -48 45 31           ~ 1 0
40 ACO 3330 ClG 05 14 47.4 -49 04 19           ~ 28 2
41 LEDA 480844 G 05 15 17.1 -49 03 51           ~ 2 0
42 LEDA 480868 G 05 15 29.4 -49 03 45           ~ 2 0
43 LEDA 482607 G 05 15 44.2 -48 53 33           ~ 2 0
44 [SYR2012] a3330sp-47 G 05 16 03.3 -49 14 23           ~ 1 0
45 LEDA 482547 G 05 16 05.9 -48 53 58           ~ 2 0
46 [SYR2012] a3330sp-99 G 05 16 09.4 -48 54 30           ~ 1 0
47 LEDA 482639 G 05 16 10.4 -48 53 23           ~ 2 0
48 2MASX J23531998-1032161 GiC 23 53 19.9815872593 -10 32 16.512777260           ~ 5 0
49 LEDA 981790 GiC 23 53 24.1 -10 08 56           ~ 3 0
50 LEDA 141182 GiC 23 53 26.817 -10 24 42.16           ~ 4 0
51 2MASX J23532954-1031431 GiC 23 53 29.5136341336 -10 31 43.475841008           ~ 4 0
52 2MASX J23533273-1034251 GiC 23 53 32.7442725545 -10 34 24.779282499   17.48   16.02   ~ 4 0
53 2MASX J23534052-1024201 LIN 23 53 40.520 -10 24 19.93   16.72       ~ 16 0
54 2MASX J23534666-1016150 GiC 23 53 46.6672201358 -10 16 14.886143191   16.60   15.46   ~ 7 0
55 2dFGRS TGS888Z122 GiC 23 53 47.5909152049 -10 37 33.979278587   16.816   15.439   ~ 4 0
56 LEDA 141206 GiC 23 53 48.4 -10 24 54           ~ 4 0
57 2MASX J23535602-1016140 GiC 23 53 55.996 -10 16 13.47           ~ 6 0
58 2MASX J23540143-1012479 GiC 23 54 01.435 -10 12 48.00           ~ 3 0
59 2MASX J23540212-1025589 GiC 23 54 02.1085663215 -10 25 58.907843011           ~ 4 0
60 2MASX J23540571-1018309 LIN 23 54 05.6858572758 -10 18 30.649812106   17.26   15.84   ~ 9 0
61 LEDA 978586 GiC 23 54 10.06 -10 24 25.4           ~ 4 0
62 2MASX J23541040-1029509 G 23 54 10.400 -10 29 50.97   17.52       ~ 5 0
63 LEDA 982144 GiC 23 54 13.4 -10 07 18           ~ 3 0
64 ACO 2670 ClG 23 54 13.64 -10 25 08.7           ~ 337 0
65 2MASX J23541371-1025084 LIN 23 54 13.663 -10 25 08.48   15.32       ~ 46 2
66 LEDA 141286 GiC 23 54 14.8 -10 24 49           ~ 5 0
67 2dFGRS TGS888Z037 GiC 23 54 14.941 -10 14 09.41   18.185   16.890   ~ 5 0
68 2MASX J23541716-1024564 GiC 23 54 17.1526100727 -10 24 56.445586584           ~ 8 0
69 2dFGRS TGS888Z017 GiC 23 54 19.627 -10 25 53.83   18.654   17.222   ~ 8 0
70 2dFGRS TGS888Z013 GiC 23 54 21.5092176278 -10 25 10.849285353   17.69   15.955   ~ 9 0
71 2MASX J23543086-1013244 GiC 23 54 30.8348229824 -10 13 24.147977577           ~ 4 0
72 2MASX J23543960-1025224 GiC 23 54 39.6070814407 -10 25 22.666920536           ~ 6 0
73 LEDA 141364 GiC 23 54 51.89 -10 28 08.0           ~ 4 0

    Equat.    Gal    SGal    Ecl

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2020.11.30-23:01:56

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