2018A&A...620A..25D


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.29CET21:05:38

2018A&A...620A..25D - Astronomy and Astrophysics, volume 620A, 25-25 (2018/12-1)

Cosmic dance in the Shapley Concentration Core. I. A study of the radio emission of the BCGs and tailed radio galaxies.

DI GENNARO G., VENTURI T., DALLACASA D., GIACINTUCCI S., MERLUZZI P., BUSARELLO G., MERCURIO A., BARDELLI S., GASTALDELLO F., GRADO A., HAINES C.P., LIMATOLA L. and ROSSETTI M.

Abstract (from CDS):


Context. The Shapley Concentration (<z> ~=0.048) covers several degrees in the southern hemisphere, and includes galaxy clusters in advanced evolutionary stages, groups of clusters in the very early stages of merger, fairly massive clusters with ongoing accretion activity, and smaller groups located in filaments in the regions between the main clusters.
Aims. With the goal to investigate the role of cluster mergers and accretion on the radio galaxy population, we performed a multi-wavelength study of the brightest cluster galaxies (BCGs) and of the galaxies showing extended radio emission in the cluster complexes of Abell 3528 and Abell 3558. In total, our study is based on a sample of 12 galaxies.
Methods. We observed the clusters with the Giant Metrewave Radio Telescope (GMRT) at 235, 325, and 610MHz, and with the Very Large Array (VLA) at 8.46GHz. We complemented our study with the TIFR GMRT Sky Survey (TGSS) at 150MHz, the Sydney University Molonglo Sky Survey (SUMSS) at 843MHz, and the Australia Telescope Compact array (ATCA) at 1380, 1400, 2380, and 4790MHz data. Finally, optical imaging with the VLT Survey Telescope (VST) is also available for the host galaxies as well as the mid-infrared coverage with the Wide-Field Infrared Survey Explorer (WISE).
Results. We found significant differences in the properties of the radio emission of the BCGs in the two cluster complexes. The BCGs in the A 3528 complex and in A 3556, which are relaxed cool-core objects, are powerful active radio galaxies. They also present hints of restarted activity. On the contrary, the BCGs in A 3558 and A 3562, which are well-known merging systems, are very faint, or quiet, in the radio band. The optical and infrared properties of the galaxies, on the other hand, are fairly similar in the two complexes, showing all passive red galaxies.
Conclusions. Our study shows remarkable differences in the radio properties of the BGCs, which we relate to the different dynamical state of the host cluster. On the contrary, the lack of changes between such different environments in the optical band suggests that the dynamical state of galaxy clusters does not affect the optical counterparts of the radio galaxies, at least over the lifetime of the radio emission.

Abstract Copyright: © ESO 2018

Journal keyword(s): radiation mechanisms: non-thermal - galaxies: clusters: general - galaxies: elliptical and lenticular, cD - radio continuum: galaxies

CDS comments: Paragrapg 6.1.1. CSS J1613+4223 not identified.

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 3258 ClG 04 27 44 -44 38.4           ~ 2 0
2 ACO 3528 ClG 12 54 18.2 -29 01 16           ~ 147 1
3 2MASX J12542040-2904086 GiC 12 54 20.405 -29 04 08.66   16.86   15.52   ~ 10 0
4 NAME A3528-N ClG 12 54 22.1 -29 00 46           ~ 31 0
5 ESO 443-4 BiC 12 54 22.229 -29 00 46.65   14.53   12.93   ~ 31 1
6 LEDA 734493 GiC 12 54 23.3 -29 01 04           ~ 7 0
7 NAME A3528-S ClG 12 54 40.6 -29 13 44           ~ 49 0
8 2MASX J12544071-2901487 GiC 12 54 40.712 -29 01 48.74   17.20   15.80   ~ 10 0
9 ESO 443-7 BiC 12 54 41.005 -29 13 39.74   14.47   12.75   ~ 44 1
10 2MASX J12545240-2916171 GiC 12 54 52.405 -29 16 17.13   15.7       ~ 20 0
11 [VBZ2001] J1255-3019 rG 12 55 06.1 -30 19 05           ~ 1 0
12 ACO 3530 ClG 12 55 36 -30 21.2           ~ 86 0
13 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 151 2
14 2MASX J12572192-3021485 BiC 12 57 21.921 -30 21 48.53   15.5       ~ 36 1
15 NAME SHAPLEY-CENTAURUS CL SCG 13 06.0 -33 04           ~ 483 0
16 3C 283 rG 13 11 39.3 -22 16 41   20       ~ 83 1
17 NAME HYA-CEN SUPERCL SCG 13 14 -33.3           ~ 128 0
18 NAME COSMOS 5975 GiC 13 23 57.634 -31 38 45.35   15.63   13.93   ~ 23 0
19 ACO 3556 ClG 13 24 06.2 -31 39 38           ~ 137 0
20 ESO 444-25 BiC 13 24 06.694 -31 40 11.84   14.31   12.66   ~ 32 0
21 ACO 3558 ClG 13 27 54.8 -31 29 32           ~ 403 2
22 ESO 444-46 BiC 13 27 56.884 -31 29 43.71   13.88 15 12.24   ~ 66 2
23 [BZM96] 8 ClG 13 29 47 -31 36.5           ~ 57 1
24 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3652 1
25 BAX 202.9000-31.8128 ClG 13 31 36 -31 48.8           ~ 67 1
26 2MASX J13333164-3140589 rG 13 33 31.641 -31 40 58.91   17.33   15.39   ~ 11 0
27 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 280 1
28 ESO 444-72 BiC 13 33 34.739 -31 40 20.16   14.40   12.83   ~ 45 0

    Equat.    Gal    SGal    Ecl

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2020.01.29-21:05:38

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