2010A&A...522A.105G


Query : 2010A&A...522A.105G

2010A&A...522A.105G - Astronomy and Astrophysics, volume 522, A105-105 (2010/11-1)

Rotation measures of radio sources in hot galaxy clusters.

GOVONI F., DOLAG K., MURGIA M., FERETTI L., SCHINDLER S., GIOVANNINI G., BOSCHIN W., VACCA V. and BONAFEDE A.

Abstract (from CDS):

The goal of this work is to investigate the Faraday rotation measure (RM) of radio galaxies in hot galaxy clusters in order to establish a possible connection between the magnetic field strength and the gas temperature of the intracluster medium. We performed Very Large Array observations at 3.6cm and 6cm of two radio galaxies located in A401 and Ophiuchus, a radio galaxy in A2142, and a radio galaxy located in the background of A2065. All these galaxy clusters are characterized by high temperatures. We obtained detailed RM images at an angular resolution of 3'' for most of the observed radio galaxies. The RM images are patchy and reveal fine substructures of a few kpc in size. Under the assumption that the radio galaxies themselves have no effect on the measured RMs, these structures indicate that the intracluster magnetic fields fluctuate down to such small scales. These new data are compared with RM information present in the literature for cooler galaxy clusters. For a fixed projected distance from the cluster center, clusters with higher temperature show a higher dispersion of the RM distributions (σRM), mostly because of the higher gas density in these clusters. Although the previously known relation between the clusters X-ray surface brightness (SX) at the radio galaxy location and σRM is confirmed, a possible connection between the σRM-SX relation and the cluster temperature, if present, is very weak. Therefore, in view of the current data, it is impossible to establish a strict link between the magnetic field strength and the gas temperature of the intracluster medium.

Abstract Copyright:

Journal keyword(s): magnetic fields - polarization - large-scale structure of Universe - globular clusters: individual: A401 - globular clusters: individual: A2142 - globular clusters: individual: A2065

Simbad objects: 40

goto Full paper

goto View the references in ADS

Number of rows : 40
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 4C -01.04 rG 00 56 02.6897785104 -01 20 03.767007480   15.5817766 14.5116005     ~ 95 0
2 ACO 119 ClG 00 56 16.8 -01 15 00           ~ 537 2
3 MRC 0053-015 Rad 00 56 24.0 -01 17 27           ~ 4 0
4 UGC 595 AGN 00 57 34.9014254976 -01 23 27.577476276   14.07 15.10     ~ 242 1
5 ACO 400 ClG 02 57 37.4 +06 00 45           ~ 394 3
6 3C 75 PaG 02 57 41.64 +06 01 28.0           ~ 294 1
7 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 375 0
8 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 541 0
9 [OWG93] ACO 0514-F GiC 04 47 13.11 -20 14 01.0     18.5     ~ 9 1
10 ACO 514 ClG 04 47 40.0 -20 25 44           ~ 138 0
11 2MASX J04481046-2024574 GiC 04 48 10.4471348856 -20 24 57.104240652   16.99   15.38   ~ 17 0
12 [GTD2001] C rG 04 48 21.7 -20 04 48           ~ 2 0
13 PKS 0446-206 rG 04 48 30.5629072752 -20 32 13.500255624   16.86   15.36   ~ 30 1
14 [GTD2001] E rG 04 48 59.0 -20 44 51           ~ 2 0
15 3C 129 rG 04 49 09.064 +45 00 39.40   19       ~ 252 2
16 LEDA 16124 G 04 50 06.685 +45 03 05.74   19       ~ 64 1
17 ACO 644 ClG 08 17 24.5 -07 30 46           ~ 210 0
18 ACO 754 ClG 09 08 50.1 -09 38 12           ~ 647 1
19 NVSS J125638+281642 Rad 12 56 38.06 +28 16 42.8   20.9       ~ 17 1
20 [K94] 125634.42+280256.8 Rad 12 58 59.3 +27 46 51           ~ 13 0
21 NGC 4869 rG 12 59 23.3588349024 +27 54 41.731884360 15.03 14.9 13.52 13.292 12.536 ~ 272 0
22 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 758 3
23 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4551 2
24 [K94] 125826.10+282411.5 Rad 13 00 50.86224 +28 08 04.0632           ~ 13 0
25 7C 1258+2837 QSO 13 01 20.1239726520 +28 21 37.239778620   19.45 19.40     ~ 63 2
26 10P 308 Rad 13 03 14.4 +27 30 15           ~ 7 0
27 ACO 2065 ClG 15 22 42.6 +27 43 21           ~ 352 0
28 NAME Corona Borealis SCG 15 25 +29.5           ~ 124 0
29 ACO 2142 ClG 15 58 20.00 +27 14 00.3           ~ 718 0
30 GB6 B1712+6405 rG 17 12 23.8007008608 +64 02 11.388271056           ~ 18 2
31 NAME Oph Cluster ClG 17 12 24.7 -23 21 01           ~ 259 0
32 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 535 0
33 NAME Beaver Galaxy rG 17 13 16.0032670728 +63 47 37.537544544           ~ 31 1
34 7C 1713+6407b LIN 17 13 29.113 +64 02 48.73           ~ 40 2
35 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13192 0
36 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 436 1
37 PKS 2149-158 rG 21 51 55.0225372920 -15 37 35.879390616   16.35   14.93   ~ 26 1
38 ACO 2382 ClG 21 51 57.2984 -15 36 48.067           ~ 112 0
39 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 491 2
40 NGC 7720 Sy1 23 38 29.3826586776 +27 01 53.266063332   13.9 13.3     ~ 523 4

To bookmark this query, right click on this link: simbad:objects in 2010A&A...522A.105G and select 'bookmark this link' or equivalent in the popup menu


2022.10.02-03:17:44

© Université de Strasbourg/CNRS

    • Contact