2017A&A...597A..96R


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.04CEST13:36:16

2017A&A...597A..96R - Astronomy and Astrophysics, volume 597A, 96-96 (2017/1-1)

Diffuse radio emission in MACS J0025.4-1222: the effect of a major merger on bulk separation of ICM components.

RISELEY C.J., SCAIFE A.M.M., WISE M.W. and CLARKE A.O.

Abstract (from CDS):

Context. Mergers of galaxy clusters are among the most energetic events in the Universe. These events have significant impact on the intra-cluster medium, depositing vast amounts of energy, often in the form of shocks, as well as heavily influencing the properties of the constituent galaxy population. Many clusters have been shown to host large-scale diffuse radio emission, known variously as radio haloes and relics. These sources arise as a result of electron (re-)acceleration in cluster-scale magnetic fields, although the processes by which this occurs are still poorly understood.
Aims. We present new, deep radio observations of the high-redshift galaxy cluster MACS J0025.4-1222, taken with the Giant Metrewave Radio Telescope (GMRT) at 325MHz, as well as a new analysis of all archival Chandra X-ray observations. We aim to investigate the potential of diffuse radio emission and categorise the radio population of this cluster, which has only been covered previously by shallow radio surveys.
Methods. We produced low-resolution maps of MACS J0025.4-1222 through a combination of uv-tapering and subtracting the compact source population. Radial surface brightness and mass profiles were derived from the Chandra data. We also derived a 2D map of the intracluster medium temperature.
Results. For the first time, two sources of diffuse radio emission are detected in MACS J0025.4-1222, on linear scales of several hundred kpc. Given the redshift of the cluster and the assumed cosmology, these sources appear to be consistent with established trends in power scaling relations for radio relics. The X-ray temperature map presents evidence of an asymmetric temperature profile and tentative identification of a temperature jump associated with one relic.
Conclusions. We classify the pair of diffuse radio sources in this cluster as a pair of radio relics, given their consistency with scaling relations, location toward the cluster outskirts, and the available X-ray data.

Abstract Copyright: © ESO, 2017

Journal keyword(s): radio continuum: general - galaxies: clusters: individual: MACS J0025.4-1222 - X-rays: galaxies: clusters

Status at CDS:  

Simbad objects: 33

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Number of rows : 33

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 2744 ClG 00 14 20.03 -30 23 17.8           ~ 565 0
2 3C 8 rG 00 18 51.35 -12 42 34.0           ~ 31 1
3 SDSS J002150.58-123349.0 G 00 21 50.586 -12 33 49.06           ~ 1 0
4 PMN J0022-1148 Rad 00 22 39.424 -11 49 11.98           ~ 2 1
5 SDSS J002239.44-114912.0 G 00 22 39.449 -11 49 12.01           ~ 1 0
6 NVSS J002313-121246 Rad 00 23 13.88 -12 12 46.8           ~ 2 0
7 SDSS J002314.06-121245.7 G 00 23 14.062 -12 12 45.80           ~ 1 0
8 SDSS J002315.60-123750.2 G 00 23 15.607 -12 37 50.26           ~ 1 0
9 MCS J0025.4-1222 ClG 00 25 29.381 -12 22 37.06           ~ 116 0
10 NVSS J002546-124725 Rad 00 25 46.6 -12 47 20           ~ 3 1
11 PKS 0023-13 Rad 00 26 02.7 -12 47 36           ~ 3 0
12 2MASX J00265983-1218378 G 00 26 59.831 -12 18 37.81   17.50   15.84   ~ 3 0
13 WISEA J002711.53-124819.1 IR 00 27 11.53 -12 48 19.1           ~ 1 0
14 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 235 1
15 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 150 0
16 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2484 2
17 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1258 1
18 [FBS2006] B Rad 05 45 22.0 -25 47 30           ~ 4 0
19 ACO 3376 ClG 06 01 42.1521 -39 59 06.227           ~ 267 0
20 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 795 1
21 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 350 0
22 ACO 584 ClG 07 28 34 +26 40.8           ~ 10 0
23 ACO 754 ClG 09 08 50.1 -09 38 12           ~ 630 1
24 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 316 0
25 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4187 2
26 ACO 1664 ClG 13 03 42.4 -24 14 44           ~ 110 0
27 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3700 1
28 ACO S 753 ClG 14 03 35.9 -33 59 16           ~ 77 1
29 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 519 0
30 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 501 0
31 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 563 1
32 NAME Sausage Cluster ClG 22 42 53.0 +53 01 05           ~ 154 0
33 87GB 234825.5+642339 G 23 50 54.80 +64 40 19.0           ~ 67 1

    Equat.    Gal    SGal    Ecl

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2020.06.04-13:36:16

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