2019ApJ...884...49T

Query : 2019ApJ...884...49T

2019ApJ...884...49T - Astrophys. J., 884, 49-49 (2019/October-2)

A survey of magnetic field strengths in the envelopes of molecular clouds via the 18 cm OH Zeeman effect.

THOMPSON K.L., TROLAND T.H. and HEILES C.

Abstract (from CDS):

We present the results of an extensive Arecibo observational survey of magnetic field strengths in the inter-core regions of molecular clouds to determine their role in the evolution and collapse of molecular clouds as a whole. Sensitive 18 cm OH Zeeman observations of absorption lines from Galactic molecular gas in the direction of extragalactic continuum sources yielded 38 independent measurements of magnetic field strengths. Zeeman detections were achieved at the 3σ level toward nine clouds, while the others revealed sensitive upper limits to the magnetic field strength. Our results suggest that total field strengths in the inter-core regions of giant molecular clouds (GMCs) are about 15 µG.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Interstellar magnetic fields - Star formation - Molecular clouds

CDS comments: B190840+09 and B1919+1357 were not identified.

Simbad objects: 26

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Number of rows : 26
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 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
2 3C 92 Rad 03 40 08.534 +32 09 02.22           ~ 28 1
3 4C 17.23 BLL 04 11 40.6614059016 +17 14 05.076436632     19.0     ~ 19 2
4 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
5 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
6 3C 131 Rad 04 53 23.326 +31 29 25.30           ~ 69 1
7 DW 0456+27 Bla 04 59 56.0847559656 +27 06 02.074332600           ~ 46 1
8 ICRF J050258.4+251625 Sy2 05 02 58.47476282 +25 16 25.2757175   20       ~ 187 1
9 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
10 4C 27.16A Rad 05 34 25.704 +27 32 24.71           ~ 11 1
11 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
12 3C 154.0 QSO 06 13 50.1393487560 +26 04 36.718432032           ~ 164 0
13 4C 14.18 BLL 06 25 45.9222413976 +14 40 19.738875648           ~ 47 2
14 4C 10.20 Rad 06 32 15.302 +10 22 02.17           ~ 37 1
15 NAME Mon I MoC 06 35 +10.1           ~ 268 0
16 3C 207.0 Bla 08 40 47.58842599 +13 12 23.5637506   18.58 18.15 17.622   ~ 455 1
17 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
18 4C 13.67 Rad 18 37 29.130 +13 30 14.81           ~ 19 1
19 GB6 B1853+0749 Rad 18 56 12.4 +07 53 44           ~ 3 1
20 NVSS J190101+041208 Rad 19 01 02.1 +04 12 01           ~ 3 1
21 GB6 B1920+1410 Rad 19 23 02.0 +14 16 23           ~ 1 0
22 SH 2-88 B HII 19 46 48.2 +25 12 21           ~ 159 2
23 NVSS J201049+332213 Rad 20 10 49.72317259 +33 22 13.8116071           ~ 25 1
24 3C 417 Rad 20 37 37.29 +32 03 40.9           ~ 10 1
25 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
26 W 49(OH) Mas ~ ~           ~ 3 0

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