2022A&A...660A..81V

Query : 2022A&A...660A..81V

2022A&A...660A..81V - Astronomy and Astrophysics, volume 660A81-81 (2022/4-1)

Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales.

VENTURI T., GIACINTUCCI S., MERLUZZI P., BARDELLI S., BUSARELLO G., DALLACASA D., SIKHOSANA S.P., MARVIL J., SMIRNOV O., BOURDIN H., MAZZOTTA P., ROSSETTI M., RUDNICK L., BERNARDI G., BRUGGEN M., CARRETTI E., CASSANO R., DI GENNARO G., GASTALDELLO F., KALE R., KNOWLES K., KORIBALSKI B.S., HEYWOOD I., HOPKINS A.M., NORRIS R.P., REIPRICH T.H., TASSE C., VERNSTROM T., ZUCCA E., BESTER L.H., DIEGO J.M. and KANAPATHIPPILLAI J.

Abstract (from CDS):


Context. The Shapley Supercluster (<z> ≃0.048) contains several tens of gravitationally bound clusters and groups, making it an ideal subject for radio studies of cluster mergers.
Aims. We used new high sensitivity radio observations to investigate the less energetic events of mass assembly in the Shapley Supercluster from supercluster down to galactic scales.
Methods. We created total intensity images of the full region between A3558 and A3562, from ∼230 to ∼1650 MHz, using ASKAP, MeerKAT and the GMRT, with sensitivities ranging from ∼6 to ∼100 µJy beam–1. We performed a detailed morphological and spectral study of the extended emission features, complemented with ESO-VST optical imaging and X-ray data from XMM-Newton.
Results. We report the first GHz frequency detection of extremely low brightness intercluster diffuse emission on a ∼1 Mpc scale connecting a cluster and a group, namely: A3562 and the group SC 1329-313. It is morphologically similar to the X-ray emission in the region. We also found (1) a radio tail generated by ram pressure stripping in the galaxy SOS 61086 in SC 1329-313; (2) a head-tail radio galaxy, whose tail is broken and culminates in a misaligned bar; (3) ultrasteep diffuse emission at the centre of A3558. Finally (4), we confirm the ultra-steep spectrum nature of the radio halo in A3562.
Conclusions. Our study strongly supports the scenario of a flyby of SC 1329-313 north of A3562 into the supercluster core. This event perturbed the centre of A3562, leaving traces of this interaction in the form of turbulence between A3562 and SC 1329-313, at the origin of the radio bridge and eventually affecting the evolution of individual supercluster galaxies by triggering ram pressure stripping. Our work shows that minor mergers can be spectacular and have the potential to generate diffuse radio emission that carries important information on the formation of large-scale structures in the Universe.

Abstract Copyright: © ESO 2022

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: A3558 - galaxies: clusters: individual: A3562 - galaxies: clusters: individual: SC 1329-313 - galaxies: clusters: individual: SC 1327-312 - radio continuum: galaxies

Simbad objects: 54

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Number of rows : 54
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 399 ClG 02 57 56.4 +13 00 59           ~ 420 0
2 ACO 401 ClG 02 58 50.3 +13 34 07           ~ 592 0
3 ICRF J040820.3-654509 Sy2 04 08 20.37884 -65 45 09.0806     18.0     ~ 207 1
4 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
5 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 222 1
6 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 229 0
7 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
8 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 668 2
9 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
10 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
11 NGC 4522 GiG 12 33 39.657 +09 10 29.54   13.6       ~ 396 0
12 M 90 Sy2 12 36 49.8009839880 +13 09 46.523813040 10.56 10.26 9.54     ~ 953 1
13 ACO 3528 ClG 12 54 18.2 -29 01 16           ~ 166 1
14 ACO 3530 ClG 12 55 36.0 -30 20 49           ~ 109 0
15 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 185 2
16 NAME NGC 4839 Group GrG 12 57 21.5 +27 31 54           ~ 86 0
17 ACO S 718 ClG 12 59 44 -33 40.2           ~ 10 0
18 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
19 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
20 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 149 1
21 ACO 3542 ClG 13 08 41 -34 34.0           ~ 25 0
22 3C 283 rG 13 11 39.3334 -22 16 41.315   20       ~ 95 1
23 NAME HYA-CEN SUPERCL SCG 13 14 -33.3           ~ 146 0
24 ACO 3552 ClG 13 18 53 -31 48.8           ~ 22 0
25 ACO 3556 ClG 13 24 06.2 -31 39 38           ~ 159 0
26 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
27 BAX 202.4458-31.6081 ClG 13 29 47.0 -31 36 29           ~ 80 1
28 ACO 3559 ClG 13 29 53.9 -29 31 29           ~ 74 0
29 ACO S 736 ClG 13 30 59 -28 02.4           ~ 7 0
30 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
31 BAX 202.9000-31.8128 ClG 13 31 28.8 -31 49 40           ~ 88 1
32 [GVB2004] J1331-3149b Rad 13 31 59.47 -31 49 19.8           ~ 1 0
33 LEDA 2799997 GiC 13 31 59.795 -31 49 22.03   16.91   16.53 16.32 ~ 10 0
34 LEDA 47590 rG 13 32 03.1619332728 -31 46 48.527873652   15.65   13.99 13.43 ~ 36 0
35 ACO 3560 ClG 13 32 23.7 -33 08 21           ~ 145 1
36 ACO 1758 ClG 13 32 32.1 +50 30 37           ~ 266 2
37 NAME ACO 1758S GrG 13 32 32.8 +50 24 48           ~ 74 0
38 MCXC J1332.7+5032 ClG 13 32 44.8 +50 32 24           ~ 134 0
39 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
40 ACO 3564 ClG 13 34 22 -35 13.4           ~ 36 0
41 IC 4296 rG 13 36 39.03253319 -33 57 57.0730368   11.52 12.99 10.00 10.79 ~ 520 2
42 ACO 3566 ClG 13 38 59 -35 33.2           ~ 45 0
43 ACO 3568 ClG 13 41 11 -34 38.1           ~ 8 0
44 ACO 3572 ClG 13 48 11 -33 22.9           ~ 30 0
45 ACO 3575 ClG 13 52 35 -32 52.8           ~ 33 0
46 ACO 3577 ClG 13 54 20 -27 50.7           ~ 30 0
47 ACO 2034 ClG 15 10 03.9 +33 30 57           ~ 248 1
48 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
49 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
50 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
51 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
52 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
53 * P Cyg s*b 20 17 47.2019733389 +38 01 58.549132671 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1200 1
54 ACO 2443 ClG 22 26 14.09 +17 25 13.5           ~ 126 0

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