2011A&A...526A...9B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST14:29:15

2011A&A...526A...9B - Astronomy and Astrophysics, volume 526A, 9-9 (2011/2-1)

Wide field polarimetry around the Perseus cluster at 350 MHz.

BRENTJENS M.A.

Abstract (from CDS):

This paper investigates the fascinating diffuse polarization structures at 350 MHz that have previously been tentatively attributed to the Perseus cluster and, more specifically, tries to find out whether the structures are located at (or near) the Perseus cluster, or in the Milky Way. A wide field, eight point Westerbork Synthesis Radio Telescope mosaic of the area around the Perseus cluster was observed in full polarization. The frequency range was 324 to 378MHz and the resolution of the polarization maps was 2'x3'. The maps were processed using Faraday rotation measure synthesis to counter bandwidth depolarization. The RM-cube covers Faraday depths of -384 to +381rad/m2 in steps of 3rad/m2. There is emission all over the field at Faraday depths between -50 and +100rad/m2. All previously observed structures were detected. However, no compelling evidence was found supporting association of those structures with either the Perseus cluster or large scale structure formation gas flows in the Perseus-Pisces super cluster. On the contrary, one of the structures is clearly associated with a Galactic depolarization canal at 1.41GHz. Another large structure in polarized intensity, as well as Faraday depth at a Faraday depth of +30rad/m2, coincides with a dark object in WHAM Hα maps at a kinematic distance of 0.5±0.5kpc. All diffuse polarized emission at 350MHz towards the Perseus cluster is most likely located within 1kpc from the Sun. The layers that emit the polarized radiation are less than 40pc/|B||| thick.

Abstract Copyright:

Journal keyword(s): radio continuum: ISM - galaxies: clusters: individual: Perseus cluster - ISM: magnetic fields - polarization - techniques: polarimetric

Simbad objects: 16

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Number of rows : 16

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 NAME NCP reg 00 00 00 +90 00.0           ~ 141 0
2 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 571 0
3 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2495 2
4 NAME PER SUPERCL SCG 02 33.2 +41 37           ~ 361 1
5 NGC 1265 GiC 03 18 15.674 +41 51 27.94   14.7       ~ 349 2
6 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1939 1
7 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3544 3
8 NAME Per Arm PoG 03 30 +45.0           ~ 1247 0
9 ICRF J054236.1+495107 Sy1 05 42 36.13789843 +49 51 07.2337251   18.45 17.80 17.210   ~ 1266 1
10 4C 56.16 rG 07 49 48.1 +55 54 19           ~ 165 1
11 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3715 1
12 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 896 5
13 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1552 2
14 ACO 2256 ClG 17 03 43.5 +78 43 03           ~ 830 1
15 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 502 0
16 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 566 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-14:29:15

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