2013ApJ...770...56G

Query : 2013ApJ...770...56G

2013ApJ...770...56G - Astrophys. J., 770, 56 (2013/June-2)

Sloshing cold fronts in galaxy groups and their perturbing disk galaxies: an X-ray, optical, and radio case study.

GASTALDELLO F., DI GESU L., GHIZZARDI S., GIACINTUCCI S., GIRARDI M., ROEDIGER E., ROSSETTI M., BRIGHENTI F., BUOTE D.A., ECKERT D., ETTORI S., HUMPHREY P.J. and MATHEWS W.G.

Abstract (from CDS):

We present a combined X-ray, optical, and radio analysis of the galaxy group IC 1860 using the currently available Chandra and XMM data, multi-object spectroscopy data from the literature, and Giant Metrewave Radio Telescope (GMRT) data. The Chandra and XMM imaging and spectroscopy reveal two surface brightness discontinuities at 45 and 76 kpc shown to be consistent with a pair of cold fronts. These features are interpreted as due to sloshing of the central gas induced by an off-axis minor merger with a perturber. This scenario is further supported by the presence of a peculiar velocity of the central galaxy IC 1860 and the identification of a possible perturber in the optically disturbed spiral galaxy IC 1859. The identification of the perturber is consistent with the comparison with numerical simulations of sloshing. The GMRT observation at 325 MHz shows faint, extended radio emission contained within the inner cold front, as seen in some galaxy clusters hosting diffuse radio mini-halos. However, unlike mini-halos, no particle reacceleration is needed to explain the extended radio emission, which is consistent with aged radio plasma redistributed by the sloshing. There is a strong analogy between the X-ray and optical phenomenology of the IC 1860 group and that of two other groups, NGC 5044 and NGC 5846, showing cold fronts. The evidence presented in this paper is among the strongest supporting the currently favored model of cold-front formation in relaxed objects and establishes the group scale as a chief environment for studying this phenomenon.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: intracluster medium - galaxies: groups: individual (IC 1860, NGC 5044, NGC 5846) - hydrodynamics - X-rays: galaxies: clusters

Simbad objects: 98

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Number of rows : 98
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 LEDA 702199 AG? 02 45 45.40 -31 41 42.9   18.467   17.375   ~ 5 0
2 LEDA 700180 AG? 02 46 12.54 -31 51 31.3   19.210   18.685   ~ 4 0
3 2dFGRS TGS466Z166 G 02 46 13.58 -31 53 10.1   19.319   18.489   ~ 2 0
4 LEDA 199020 G 02 46 33.30 -31 32 46.1   17.027   16.226   ~ 4 0
5 2dFGRS TGS393Z037 AG? 02 46 44.35 -30 47 18.1   18.925   18.434   ~ 3 0
6 MCG-05-07-026 G 02 47 07.0176205128 -31 29 03.872175792   14.93   13.43   ~ 17 0
7 2dFGRS TGS466Z140 AG? 02 47 09.80 -31 36 24.4   18.154   17.403   ~ 3 0
8 2dFGRS TGS393Z030 G 02 47 12.22 -30 28 42.1   18.576   17.953   ~ 3 0
9 6dFGS gJ024727.0-314857 GiC 02 47 26.9547714744 -31 48 57.306888684   15   15.75   ~ 8 0
10 LEDA 716505 AG? 02 47 33.79 -30 30 01.3   17.979   17.069   ~ 5 0
11 2dFGRS TGS394Z202 GiG 02 47 35.4615634008 -31 06 25.104355776   15.63   14.455   ~ 11 0
12 2dFGRS TGS466Z122 AG? 02 47 57.41 -32 03 04.3   17.730   16.904   ~ 3 0
13 LEDA 199018 AG? 02 48 28.92 -31 22 40.4   16.877   15.759   ~ 5 0
14 2MASX J02483040-3147366 GiC 02 48 30.404 -31 47 36.64   16       ~ 4 0
15 6dFGS gJ024831.5-314221 GiG 02 48 31.4986316664 -31 42 20.764304208   15.88   14.657   ~ 11 0
16 2dFGRS TGS466Z100 AG? 02 48 32.93 -31 38 48.4   19.324   18.539   ~ 3 0
17 LEDA 699435 G 02 48 35.05 -31 54 41.5   18.834   18.108   ~ 4 0
18 MCG-05-07-029 GiC 02 48 40.805 -31 32 10.62   14.68   13.30 13.7 ~ 72 0
19 LEDA 711774 AG? 02 48 53.11 -30 53 11.2   18.185   17.527   ~ 5 0
20 2dFGRS TGS466Z088 G 02 48 56.50 -31 23 03.6   18.880   17.733   ~ 3 0
21 2dFGRS TGS394Z192 GiC 02 48 56.7911654928 -31 06 43.110648324   15   16.089   ~ 7 0
22 ESO 416-27 GiC 02 48 57.3308337264 -30 47 34.649028852   15.74   14.44   ~ 15 0
23 LEDA 700525 G 02 48 58.75 -31 50 00.4   17.975   17.331   ~ 4 0
24 IC 1859 Sy2 02 49 03.9278234880 -31 10 21.052495740   14.27   12.93   ~ 58 2
25 IC 1858 LIN 02 49 08.4308847240 -31 17 22.763411736   14.15   12.67   ~ 52 1
26 6dFGS gJ024908.6-314053 GiC 02 49 08.63 -31 40 52.3   16   15.952   ~ 6 0
27 2dFGRS TGS394Z189 AG? 02 49 14.30 -31 03 49.2   18.863   17.878   ~ 3 0
28 LEDA 10679 EmG 02 49 14.9967725472 -31 03 05.564771568   15.94       ~ 18 0
29 MCG-05-07-036 GiC 02 49 22.3373662296 -31 10 54.085988748   15   16.030   ~ 5 0
30 2dFGRS TGS394Z185 GiC 02 49 29.9001501480 -31 09 24.682237596   15   16.263   ~ 12 0
31 2dFGRS TGS394Z186 G 02 49 31.6215481944 -31 10 02.190370800   18.498   17.026   ~ 2 0
32 2dFGRS TGS394Z187 GiC 02 49 32.0118071712 -31 10 22.769496516   15   15.105   ~ 14 0
33 2MASX J02493302-3111569 GiC 02 49 33.0324332352 -31 11 56.728799664   15       ~ 20 0
34 2dFGRS TGS467Z179 GiC 02 49 33.5132617176 -31 07 15.987289044   16.27   14.951   ~ 18 0
35 ACO S 301 ClG 02 49 33.72 -31 11 23.2           ~ 70 2
36 IC 1860 Sy1 02 49 33.8577739752 -31 11 21.664508208   13.00   11.47   ~ 82 1
37 2MASX J02493534-3145319 GiC 02 49 35.3436051960 -31 45 32.088910140   15   16.051   ~ 5 0
38 2dFGRS TGS394Z181 GiC 02 49 35.4906334944 -31 05 29.391424044   14   15.311   ~ 9 0
39 LEDA 710140 G 02 49 35.6471766384 -31 01 25.246448400   17.766   16.548   ~ 4 0
40 2dFGRS TGS394Z183 AG? 02 49 36.8 -31 13 14   18.972   17.830   ~ 4 0
41 MCG-05-07-037 GiG 02 49 37.542 -30 59 44.94   15.23   14.22 14.8 ~ 30 0
42 6dFGS gJ024939.3-311217 GiC 02 49 39.3340758624 -31 12 17.012691252   14   14.95   ~ 14 0
43 6dFGS gJ024941.7-311214 GiC 02 49 41.749 -31 12 13.94   14   15.919   ~ 7 0
44 2dFGRS TGS394Z176 G 02 49 42.8 -31 11 50   17.946   17.128   ~ 2 0
45 2dFGRS TGS467Z174 GiG 02 49 43.9172829768 -31 09 29.390608152   15.713   14.498   ~ 26 0
46 6dFGS gJ024948.3-310810 GiG 02 49 48.2741173440 -31 08 10.507673328   15.871   14.675   ~ 23 0
47 2dFGRS TGS394Z174 G 02 49 48.89 -31 01 57.3   19.268   18.311   ~ 3 0
48 2dFGRS TGS394Z172 GiC 02 49 52.94 -30 57 17.1   16   16.254   ~ 7 0
49 2MFGC 2270 GiC 02 49 55.8604667520 -31 17 14.894871936   16.42   14.986   ~ 22 0
50 2dFGRS TGS467Z171 GiC 02 49 56.2458601560 -31 08 00.327107868   16.21   14.945   ~ 18 0
51 2dFGRS TGS467Z172 GiC 02 49 57.26 -31 10 35.0   15   15.801   ~ 10 0
52 2dFGRS TGS467Z169 LSB 02 50 00.86 -31 18 21.5   18.4   17.720   ~ 2 0
53 LEDA 708811 G 02 50 04.8386195952 -31 07 47.953967736   17.785   16.651   ~ 4 0
54 2dFGRS TGS467Z163 G 02 50.2 -31 18   16.944   16.205   ~ 2 0
55 2dFGRS TGS394Z079 GiC 02 50 16.6942991904 -30 32 22.007304744   15   16.039   ~ 5 0
56 MCG-05-07-038 GiG 02 50 26.0086231776 -31 33 29.900862324   14.60   13.28   ~ 25 0
57 MCG-05-07-040 Sy2 02 50 31.7470054752 -31 23 40.711114536   14.48   13.25   ~ 32 0
58 MCG-05-07-039 GiG 02 50 35.525 -31 31 12.58   14.49   13.38   ~ 30 0
59 2dFGRS TGS467Z151 GiC 02 50 41.9182540632 -31 30 14.393461032   14   15.464   ~ 12 0
60 2dFGRS TGS394Z162 G 02 50 43.63 -31 02 47.7   19.084   18.059   ~ 2 0
61 2dFGRS TGS394Z161 AG? 02 50 45.13 -31 02 46.3   19.351   18.504   ~ 3 0
62 2dFGRS TGS467Z150 G 02 50 50.08 -31 31 50.1   19.047   18.372   ~ 2 0
63 NAME IC 1860 Group GrG 02 51 00 -31 07.7           ~ 5 0
64 LEDA 10826 AG? 02 51 16.2787088568 -31 19 39.327630708   15.93       ~ 16 0
65 LEDA 10831 EmG 02 51 20.5262095776 -30 46 54.533068752   14   14.30   ~ 14 0
66 2dFGRS TGS467Z137 G 02 51.4 -31 49   17.588   16.476   ~ 2 0
67 2dFGRS TGS467Z136 AG? 02 51 29.42 -31 55 33.0   19.121   18.222   ~ 3 0
68 2dFGRS TGS467Z135 G 02 51 39.57 -31 44 18.7   19.240   18.145   ~ 3 0
69 2dFGRS TGS394Z155 G 02 51 41 -30 56.5   18.951   18.186   ~ 2 0
70 2dFGRS TGS394Z041 G 02 51 42.3 -30 35 51   18.976   18.328   ~ 2 0
71 2dFGRS TGS467Z134 G 02 51 44.3 -31 29 04   17.449   16.373   ~ 2 0
72 2dFGRS TGS467Z121 AG? 02 51 58.92 -31 05 37.9   19.363   18.445   ~ 3 0
73 LEDA 715684 G 02 52 01.00 -30 33 59.3   18.226   17.596   ~ 4 0
74 2dFGRS TGS395Z039 GiC 02 52 17.37 -30 56 36.0   16   15.996   ~ 7 0
75 ESO 416-39 Sy2 02 52 22.3026241440 -31 49 02.158195368   14.94   13.44   ~ 26 0
76 MCG-05-07-044 EmG 02 52 27.1281621168 -30 46 35.634588960   14.67   12.47   ~ 28 0
77 LEDA 706462 AG? 02 52 27.16 -31 19 42.4   17.628   16.694   ~ 5 0
78 LEDA 10895 EmG 02 52 54.3014466264 -30 51 26.795373660   15.977   14.981   ~ 9 0
79 2dFGRS TGS467Z108 LSB 02 53 03 -31 45.6   19.5   18.544   ~ 3 0
80 2dFGRS TGS394Z015 AG? 02 53 07.3435134384 -30 46 30.390304296   18.848   17.878   ~ 3 0
81 2dFGRS TGS395Z037 G 02 53 20.39 -30 54 52.4   18.792   18.289   ~ 3 0
82 MCG-05-07-045 EmG 02 53 29.3418728496 -30 51 37.151616420   14.37   13.15   ~ 39 0
83 2MASS J02534024-3109586 AG? 02 53 40.2672864552 -31 09 58.654094688   18.371   17.178   ~ 3 0
84 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
85 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
86 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 391 1
87 NAME NGC 5044 Group GrG 13 14 22.7 -16 32 04           ~ 186 0
88 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 531 0
89 MCG-03-34-040 EmG 13 16 56.243 -16 35 34.79   15.1   14.62   ~ 24 0
90 NGC 5054 Sy1 13 16 58.488 -16 38 05.46   11.3   10.36 10.7 ~ 203 1
91 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
92 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
93 BAX 225.2969+01.7020 ClG 15 01 11.86 +01 41 53.2           ~ 48 0
94 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 165 0
95 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
96 NGC 5850 LIN 15 07 07.6828131840 +01 32 39.513281352   11.5   10.79 11.1 ~ 330 1
97 Z 532-11 BiC 23 18 38.2641503880 +42 57 28.797497604   15.3       ~ 41 1
98 NGC 7618 GiG 23 19 47.2346536992 +42 51 09.228387528   14.3       ~ 72 2

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