2007A&A...471L..21S


Query : 2007A&A...471L..21S

2007A&A...471L..21S - Astronomy and Astrophysics, volume 471, L21-24 (2007/8-4)

WSRT Faraday tomography of the Galactic ISM at λ∼0.86 m. First results for a field at (l,b) = (181°,20°).

SCHNITZELER D.H.F.M., KATGERT P. and DE BRUYN A.G.

Abstract (from CDS):

We investigate the distribution and properties of Faraday rotating and synchrotron emitting regions in the Galactic ISM in the direction of the Galactic anti-centre. We apply Faraday tomography to a radio polarization dataset that we obtained with the WSRT. We developed a new method to calculate a linear fit to periodic data, which we use to determine rotation measures from our polarization angle data. From simulations of a Faraday screen + noise we could determine how compatible the data are with Faraday screens.An unexpectedly large fraction of 14% of the lines-of-sight in our dataset show an unresolved main component in the Faraday depth spectrum. For lines-of-sight with a single unresolved component we demonstrate that a Faraday screen in front of a synchrotron emitting region that contains a turbulent magnetic field component can explain the data.

Abstract Copyright:

Journal keyword(s): magnetic fields - radio continuum: ISM - ISM: magnetic fields - ISM: structure - techniques: polarimetric - techniques: miscellaneous

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2720 2
2 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1424 1
3 NAME Gal Anticenter reg 05 46 +28.9           ~ 839 0
4 4C 56.16 rG 07 49 48.077 +55 54 19.45           ~ 166 1
5 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 955 5
6 3C 345 QSO 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1654 2

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2023.02.02-19:33:06

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