2012MNRAS.420..279R

Query : 2012MNRAS.420..279R

2012MNRAS.420..279R - Mon. Not. R. Astron. Soc., 420, 279-282 (2012/February-2)

The magnetic field of the H II region NGC 6334A from Faraday rotation.

RODRIGUEZ L.F., GOMEZ Y. and TAFOYA D.

Abstract (from CDS):

We have studied the polarization characteristics and Faraday rotation of the extragalactic radio source J17204-3554, which appears projected on the north lobe of the Galactic H II region NGC 6334A. From observations made with the Very Large Array at 6.0 and 3.6 cm in three different epochs (1994, 1997 and 2006), we estimate a rotation measure of +5100±900 rad/m2 for the extragalactic source. This large rotation measure implies a line-of-sight average magnetic field of B|| =^ ≲ + 36±6 µG, the largest obtained by this method for an H II region. NGC 6334A is significantly denser than other H II regions studied and this larger magnetic field is expected on the grounds of magnetic flux conservation. The ratio of thermal to magnetic pressure is ∼ 5 in the range of values determined for more diffuse H II regions.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): polarization - H {sc ii} regions - ISM: individual objects: NGC 6334A - quasars: individual: J17204-3554

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 7822 HII 00 01 08.58 +67 25 17.0           ~ 121 3
2 GAL 124.9+00.1 HII 01 08.7 +62 54           ~ 6 0
3 GAL 125.6-01.8 HII 01 13 +61.0           ~ 4 0
4 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
5 NGC 1499 HII 04 03 18 +36 25.3           ~ 179 0
6 Siv 3 HII 04 57.5 +65 29           ~ 7 0
7 NAME lam Ori Molecular Ring HII 05 35.3 +09 56           ~ 82 1
8 SH 2-232 HII 05 42 28 +36 11.4           ~ 56 0
9 PMN J1159-6207 Rad 11 59 32.2 -62 07 15           ~ 3 0
10 LBN 006.00+24.73 HII 16 35 56.8 -12 43 05           ~ 76 0
11 PMN J1656-4219 Rad 16 56 02.0 -42 19 54           ~ 3 1
12 NGC 6334A HII 17 20 19.3 -35 54 55           ~ 123 0
13 NGC 6334B rG 17 20 21.810 -35 52 48.25           ~ 113 0
14 NGC 6334 HII 17 20 53 -36 07.9           ~ 740 0
15 QSO B1730-130 Bla 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1198 1
16 NVSS J174244-294915 Rad 17 42 44.0 -29 49 16           ~ 20 1
17 QSO J1744-3116 Bla 17 44 23.57824 -31 16 36.2943           ~ 168 1
18 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
19 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
20 PSR B1829-10 Psr 18 32 40.866 -10 21 32.78           ~ 73 0
21 NGC 7000 Cl* 20 58 47 +44 19.8           ~ 427 0
22 LBN 087.23-03.80 HII 21 18.5 +43 56           ~ 42 0

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