2022ApJ...925....4M

Query : 2022ApJ...925....4M

2022ApJ...925....4M - Astrophys. J., 925, 4-4 (2022/January-3)

Observing Ram Pressure at Work in Intermediate Redshift Clusters with MUSE: The Case of Abell 2744 and Abell 370.

MORETTI A., RADOVICH M., POGGIANTI B.M., VULCANI B., GULLIEUSZIK M., WERLE A., BELLHOUSE C., BACCHINI C., FRITZ J., SOUCAIL G., RICHARD J., FRANCHETTO A., TOMICIC N. and OMIZZOLO A.

Abstract (from CDS):

Ram pressure stripping has been proven to be effective in shaping galaxy properties in dense environments at low redshift. The availability of Multi Unit Spectroscopic Explorer (MUSE) observations of a sample of distant (z ∼ 0.3-0.5) clusters has allowed one to search for galaxies subject to this phenomenon at significant lookback times. In this paper we describe how we discovered and characterized 13 ram-pressure-stripped galaxies in the central regions of two intermediate redshift (z ∼ 0.3-0.4) clusters, A2744 and A370, using the MUSE spectrograph. Emission-line properties as well as stellar features have been analyzed to infer the presence of this gas-only stripping mechanism, that produces spectacular ionized gas tails (Hα and even more astonishing [O II](3727, 3729)) departing from the main galaxy body. The inner regions of these two clusters reveal the predominance of such galaxies among blue star-forming cluster members, suggesting that ram pressure stripping was even more effective at intermediate redshift than in today's universe. Interestingly, the resolved [O II]/Hα line ratio in the stripped tails is exceptionally high compared to that in the disks of these galaxies, (which is comparable to that in normal low-z galaxies), suggesting lower gas densities and/or an interaction with the hot surrounding intracluster medium.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy clusters

Simbad objects: 43

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Number of rows : 43
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 [BAG2023] 33328 G 00 14 16.701 -30 24 43.79   23.8585 22.2163   21.5596 ~ 9 0
2 [BAE96] AC 118 114 GiC 00 14 17.611 -30 23 10.72   24.1099 21.7057   20.9904 ~ 9 0
3 [BAG2023] 41655 G 00 14 17.696 -30 23 09.52   24.3355 22.5802   21.8186 ~ 9 0
4 [BAG2023] 42195 G 00 14 18.804 -30 23 13.55   23.5606 22.0499   21.5770 ~ 11 0
5 [BAG2023] 36843 EmG 00 14 18.977 -30 24 00.32   24.9425 23.2405   22.6596 ~ 13 0
6 [BAG2023] 39876 G 00 14 19.289 -30 23 31.93   23.7482 22.0154   21.2389 ~ 10 0
7 CN AC118 28 EmG 00 14 19.420 -30 23 26.70   21.7071 21.0045   20.5888 ~ 22 0
8 [BAG2023] 36982 G 00 14 19.898 -30 23 58.91   24.6957 23.5622   23.3754 ~ 12 0
9 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
10 [BAE96] AC 118 123 GiC 00 14 20.092 -30 23 04.80   23.7063 22.0112   21.2964 ~ 11 0
11 [BAE96] AC 118 72 GiC 00 14 20.156 -30 23 57.34   23.6662 22.0191   21.3491 ~ 13 0
12 [BAE96] AC 118 78 GiC 00 14 20.395 -30 23 34.35   23.4051 21.6865   20.9432 ~ 11 0
13 [BAE96] AC 118 108 GiC 00 14 20.4754 -30 23 15.150   22.4256 20.8016   20.1622 ~ 14 0
14 [BAG2023] 32768 G 00 14 20.570 -30 24 50.31   24.5658 22.7703   21.9656 ~ 9 0
15 [MRC2018] A2744 11203 G 00 14 21.4000 -30 23 02.202   26.2444 25.7716   25.6296 ~ 5 0
16 [BAG2023] 40239 G 00 14 22.366 -30 23 25.28   25.0411 23.3505   22.6083 ~ 9 0
17 [BAE96] AC 118 118 GiC 00 14 22.386 -30 23 03.76   22.3763 21.0767   20.2807 ~ 17 0
18 [BAG2023] 42079 G 00 14 22.435 -30 23 15.34   24.9441 23.6199   23.0797 ~ 9 0
19 [BAG2023] 40703 G 00 14 23.100 -30 23 18.66   25.4409 23.6580   22.9245 ~ 9 0
20 [MAC2016] A2744cl 1422 G 00 14 24.9384 -30 23 46.075   25.5769 25.3778   25.5195 ~ 7 0
21 [BAG2023] 41908 EmG 00 14 25.057 -30 23 05.83   23.4486 22.3891   21.8824 ~ 15 0
22 [LRB2019] 8792 G 02 39 49.36 -01 34 35.1   24.728     22.805 ~ 3 0
23 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
24 [LRB2019] 12154 G 02 39 50.77 -01 34 00.5   24.965     23.136 ~ 3 0
25 SDSS J023951.02-013345.0 rG 02 39 51.020 -01 33 45.39           ~ 16 0
26 SDSS J023951.36-013359.2 G 02 39 51.366 -01 33 59.21   23.742     21.818 ~ 6 0
27 [LRB2019] 8007 G 02 39 53.2488 -01 34 47.106   24.236     22.678 ~ 5 0
28 [LRB2019] 5109 EmG 02 39 53.3366 -01 35 21.491   23.614     21.269 ~ 5 0
29 BOW ACO 370 CC232 GiC 02 39 53.5466 -01 34 31.844   23.364     20.981 ~ 10 0
30 BOW ACO 370 CC055 GiC 02 39 54.04489 -01 33 52.3475   22.495     21.122 ~ 9 0
31 [LRB2019] 5339 G 02 39 54.0475 -01 35 16.542   24.213     21.722 ~ 4 0
32 [LRB2019] 15715 G 02 39 54.46 -01 33 36.4           ~ 4 0
33 [LRB2019] 4453 G 02 39 54.5899 -01 35 24.935   24.475     22.151 ~ 4 0
34 BOW ACO 370 CC165 GiC 02 39 54.750 -01 34 53.19   21.49       ~ 16 0
35 [LRB2019] 6295 G 02 39 54.83398 -01 35 02.4509   24.500     22.578 ~ 5 0
36 [LRB2019] 13663 G 02 39 54.88 -01 33 42.8   24.915     22.795 ~ 3 0
37 [LRB2019] 7653 G 02 39 56.47 -01 34 49.7   25.136     23.109 ~ 3 0
38 [LRB2019] 9534 G 02 39 56.77 -01 34 28.0   24.151     22.744 ~ 3 0
39 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
40 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 266 2
41 CIZA J2242.8+5301 ClG 22 42 53.0 +53 01 05           ~ 228 0
42 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0
43 2dFGRS TGS132Z144 G 23 51 44.03 -26 03 59.6   18.642   18.551   ~ 7 0

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