2012A&A...542A..93O


Query : 2012A&A...542A..93O

2012A&A...542A..93O - Astronomy and Astrophysics, volume 542A, 93-93 (2012/6-1)

An improved map of the Galactic Faraday sky.

OPPERMANN N., JUNKLEWITZ H., ROBBERS G., BELL M.R., ENSSLIN T.A., BONAFEDE A., BRAUN R., BROWN J.C., CLARKE T.E., FEAIN I.J., GAENSLER B.M., HAMMOND A., HARVEY-SMITH L., HEALD G., JOHNSTON-HOLLITT M., KLEIN U., KRONBERG P.P., MAO S.A., McCLURE-GRIFFITHS N.M., O'SULLIVAN S.P., PRATLEY L., ROBISHAW T., ROY S., SCHNITZELER D.H.F.M., SOTOMAYOR-BELTRAN C., STEVENS J., STIL J.M., SUNSTRUM C., TANNA A., TAYLOR A.R. and VAN ECK C.L.

Abstract (from CDS):

We aim to summarize the current state of knowledge regarding Galactic Faraday rotation in an all-sky map of the Galactic Faraday depth. For this we have assembled the most extensive catalog of Faraday rotation data of compact extragalactic polarized radio sources to date. In the map-making procedure we used a recently developed algorithm that reconstructs the map and the power spectrum of a statistically isotropic and homogeneous field while taking into account uncertainties in the noise statistics. This procedure is able to identify some rotation angles that are offset by an integer multiple of π. The resulting map can be seen as an improved version of earlier such maps and is made publicly available, along with a map of its uncertainty. For the angular power spectrum we find a power law behavior Cl∝l–2.17 for a Faraday sky where an overall variance profile as a function of Galactic latitude has been removed, in agreement with earlier work. We show that this is in accordance with a 3D Fourier power spectrum P(k)∝k–2.17 of the underlying field neBr under simplifying geometrical and statistical assumptions.

Abstract Copyright:

Journal keyword(s): galaxies: magnetic fields - Galaxy: structure - ISM: magnetic fields - radio continuum: ISM - methods: data analysis - techniques: polarimetric

Simbad objects: 21

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Number of rows : 21
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 NAME Eridanus Shell sh 02 17 31 +07 49.6           ~ 46 0
2 NAME PER SUPERCL SCG 02 33.2 +41 37           ~ 382 1
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6075 1
4 * alf Cam s*b 04 54 03.0103983 +66 20 33.636467 3.47 4.34 4.29 4.18 4.18 O9Ia 644 1
5 Cl Collinder 69 OpC 05 35 10 +09 48.8     2.8     ~ 257 0
6 NAME lam Ori Molecular Ring HII 05 35.3 +09 56           ~ 71 1
7 RCW 15 HII 07 10 -25.1           ~ 4 0
8 NAME GUM Nebula ISM 07 43 -42.1           ~ 398 1
9 NAME North Polar Spur ISM 12 00 +00.0           ~ 323 1
10 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1077 0
11 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4145 3
12 NAME Loop I SR? 15 01 -38.7           ~ 344 2
13 NAME HERCULES SUPERCL SCG 15 47 +18.2           ~ 142 1
14 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1199 1
15 LBN 006.00+24.73 HII 16 35 56.8 -12 43 05           ~ 54 0
16 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1760 2
17 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12532 0
18 [SK80] Region A reg 22 50 +42.0           ~ 6 1
19 NAME Loop 2 SR? 23 25 +26.5           ~ 72 1
20 [SK80] Region C reg ~ ~           ~ 3 0
21 [SK80] Region B reg ~ ~           ~ 3 0

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2021.11.27-19:09:20

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