2022MNRAS.510..260L

Query : 2022MNRAS.510..260L

2022MNRAS.510..260L - Mon. Not. R. Astron. Soc., 510, 260-275 (2022/February-2)

A radio polarization study of magnetic fields in the Small Magellanic Cloud.

LIVINGSTON J.D., McCLURE-GRIFFITHS N.M., MAO S.A., MA Y.K., GAENSLER B.M., HEALD G. and SETA A.

Abstract (from CDS):

Observing the magnetic fields of low-mass interacting galaxies tells us how they have evolved over cosmic time and their importance in galaxy evolution. We have measured the Faraday rotation of 80 extra-galactic radio sources behind the Small Magellanic Cloud (SMC) using the CSIRO Australia Telescope Compact Array (ATCA) with a frequency range of 1.4-3.0 GHz. Both the sensitivity of our observations and the source density are an order-of-magnitude improvement on previous Faraday rotation measurements of this galaxy. The SMC generally produces negative rotation measures after accounting for the Milky Way foreground contribution, indicating that it has a mean coherent line-of-sight magnetic field strength of -0.3±0.1 µG, consistent with previous findings. We detect signatures of magnetic fields extending from the north and south of the Bar of the SMC. The random component of the SMC magnetic field has a strength of ∼5 µG with a characteristic size-scale of magneto-ionic turbulence <250 pc, making the SMC like other low-mass interacting galaxies. The magnetic fields of the SMC and Magellanic Bridge appear similar in direction and strength, hinting at a connection between the two fields as part of the hypothesized 'pan-Magellanic' magnetic field.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): polarization - ISM: magnetic fields - Magellanic Clouds

Nomenclature: Fig. 3, Table 2: [LMM2022] JHHMMSS.s+DDMMSS.s N=68.

Simbad objects: 99

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Number of rows : 99
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 [LMM2022] J002248.1-734008.1 rG 00 22 48.10 -73 40 08.1           ~ 1 0
2 PKS 0021-742 rG 00 23 36.4 -73 55 30           ~ 11 1
3 ATPMN J002411.8-735717 rG 00 24 11.370 -73 57 15.95           ~ 3 0
4 [LMM2022] J002412.2-735718.3 rG 00 24 12.20 -73 57 18.3           ~ 1 0
5 [LMM2022] J002440.3-734542.2 rG 00 24 40.30 -73 45 42.2           ~ 1 0
6 [LMM2022] J002440.4-734542.6 rG 00 24 40.40 -73 45 42.6           ~ 1 0
7 PMN J0030-7400 rG 00 30 06.5 -74 00 09           ~ 7 1
8 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
9 [MGS2008] 033 rG 00 34 28.440 -73 35 26.77           ~ 2 0
10 [FBR2002] J003544-735210 rG 00 35 44.67 -73 52 10.6           ~ 2 0
11 [DMS2000b] J003754-725157 rG 00 37 54.7 -72 51 57           ~ 3 0
12 [DMS2000b] J003801-725211 rG 00 38 01.0 -72 52 11           ~ 3 0
13 PMN J0038-7350 rG 00 38 09.09 -73 50 24.1           ~ 8 1
14 PMN J0038-7422 rG 00 38 24.38 -74 22 11.9           ~ 12 1
15 PMN J0039-7141 rG 00 39 39.1 -71 41 45           ~ 9 1
16 [LMM2022] J004001.4-714504.6 rG 00 40 01.40 -71 45 04.6           ~ 1 0
17 PKS 0038-720 rG 00 40 47.97 -71 45 59.3           ~ 11 1
18 [LMM2022] J004156.4-730718.8 rG 00 41 56.40 -73 07 18.8           ~ 1 0
19 [LMM2022] J004201.3-730726.9 rG 00 42 01.30 -73 07 26.9           ~ 1 0
20 [LMM2022] J004205.9-730719.9 rG 00 42 05.90 -73 07 19.9           ~ 1 0
21 IRSF J00422638-7304184 rG 00 42 26.55 -73 04 19.3         17.97 ~ 8 1
22 SUMSS J004317-714100 rG 00 43 17.6 -71 41 00           ~ 4 1
23 PSR J0043-73 Psr 00 43 25.860 -73 11 18.60           ~ 7 0
24 PSR J0045-7042 Psr 00 45 25.69 -70 42 07.1           ~ 18 0
25 PSR J0045-7319 HXB 00 45 35.2606875816 -73 19 03.269105220   15.97 16.18   16.30 B0.5-B2IV-V 193 0
26 [LMM2022] J004603.1-741328.6 rG 00 46 03.10 -74 13 28.6           ~ 1 0
27 [LMM2022] J004934.4-721901.0 rG 00 49 34.40 -72 19 01.0           ~ 1 0
28 [LMM2022] J004935.2-741540.8 rG 00 49 35.20 -74 15 40.8           ~ 1 0
29 PMN J0050-7235 rG 00 49 56.7 -72 35 54           ~ 14 2
30 [LMM2022] J005015.1-730326.4 rG 00 50 15.10 -73 03 26.4           ~ 1 0
31 [LMM2022] J005140.1-723815.9 rG 00 51 40.10 -72 38 15.9           ~ 1 0
32 [LMM2022] J005141.5-725603.7 rG 00 51 41.50 -72 56 03.7           ~ 1 0
33 [LMM2022] J005141.5-725557.7 rG 00 51 41.50 -72 55 57.7           ~ 1 0
34 [LMM2022] J005217.0-722703.8 rG 00 52 17.00 -72 27 03.8           ~ 1 0
35 XMMU J005217.6-730156 rG 00 52 17.693 -73 01 56.14           ~ 3 0
36 RX J0052.2-7301 rG 00 52 18.9 -73 01 55           ~ 3 0
37 [LMM2022] J005218.9-722707.8 rG 00 52 18.90 -72 27 07.8           ~ 1 0
38 [LMM2022] J005219.2-722708.8 rG 00 52 19.20 -72 27 08.8           ~ 1 0
39 PSR J0052-72 Psr 00 52 28.650 -72 05 13.50           ~ 5 0
40 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
41 SUMSS J005450-731647 rG 00 54 50.2 -73 16 48           ~ 4 1
42 [LMM2022] J005504.2-712107.8 rG 00 55 04.20 -71 21 07.8           ~ 1 0
43 [LMM2022] J005522.2-721052.8 rG 00 55 22.20 -72 10 52.8           ~ 1 0
44 [FBR2002] J005523-721055 rG 00 55 23.53 -72 10 55.2           ~ 3 0
45 [LMM2022] J005533.2-723125.5 rG 00 55 33.20 -72 31 25.5           ~ 1 0
46 [LMM2022] J005534.4-721056.9 rG 00 55 34.40 -72 10 56.9           ~ 1 0
47 [FBR2002] J005539-721055 rG 00 55 39.21 -72 10 55.5           ~ 3 0
48 XMMU J005557.1-722607 rG 00 55 57.166 -72 26 07.07           ~ 3 0
49 XMMU J005652.3-712300 rG 00 56 52.323 -71 23 00.11           ~ 3 0
50 PMN J0057-7413 rG 00 57 32.40 -74 12 43.6           ~ 9 2
51 [LMM2022] J005753.8-711835.3 rG 00 57 53.80 -71 18 35.3           ~ 1 0
52 [LMM2022] J005813.1-712400.8 rG 00 58 13.10 -71 24 00.8           ~ 1 0
53 [LMM2022] J005817.2-712335.7 rG 00 58 17.20 -71 23 35.7           ~ 1 0
54 XMMU J005820.4-713040 rG 00 58 20.425 -71 30 40.60           ~ 3 0
55 SUMSS J010930-713455 rG 01 09 30.8 -71 34 56           ~ 4 1
56 [LMM2022] J010958.7-713543.9 rG 01 09 58.70 -71 35 43.9           ~ 1 0
57 [LMM2022] J011020.4-730425.1 rG 01 10 20.40 -73 04 25.1           ~ 1 0
58 [LMM2022] J011024.7-730450.2 rG 01 10 24.70 -73 04 50.2           ~ 1 0
59 [MGS2008] 018 rG 01 10 35.370 -72 28 07.70           ~ 2 0
60 [MGS2008] 121 rG 01 10 45.440 -72 28 52.19           ~ 2 0
61 ATPMN J011049.2-731428 rG 01 10 49.5 -73 14 28           ~ 5 0
62 [DMS2000b] J011056-731405 rG 01 10 56.5 -73 14 05           ~ 3 0
63 PSR J0111-7131 Psr 01 11 28.77 -71 31 46.8           ~ 14 0
64 [LMM2022] J011130.4-730215.0 rG 01 11 30.40 -73 02 15.0           ~ 1 0
65 NAME MM J01115-7302 rG 01 11 32.48781 -73 02 09.8007   16.01   15.06   ~ 32 1
66 [LMM2022] J011226.1-732749.0 rG 01 12 26.10 -73 27 49.0           ~ 1 0
67 [LMM2022] J011226.1-732757.0 rG 01 12 26.10 -73 27 57.0           ~ 1 0
68 [FBR2002] J011227-724803 rG 01 12 27.24 -72 48 03.8           ~ 2 0
69 PSR J0113-7220 Psr 01 13 11.090 -72 20 32.20           ~ 15 0
70 [LMM2022] J011403.0-732007.4 rG 01 14 03.00 -73 20 07.4           ~ 1 0
71 [LMM2022] J011408.4-732006.7 rG 01 14 08.40 -73 20 06.7           ~ 1 0
72 [LMM2022] J011408.5-732006.2 rG 01 14 08.50 -73 20 06.2           ~ 1 0
73 SUMSS J011721-730919 rG 01 17 21.4 -73 09 19           ~ 4 1
74 [LMM2022] J011912.7-710833.0 rG 01 19 12.70 -71 08 33.0           ~ 1 0
75 [LMM2022] J011917.9-710538.0 rG 01 19 17.560 -71 05 42.40           ~ 2 0
76 [LMM2022] J011919.7-710524.0 rG 01 19 19.70 -71 05 24.0           ~ 1 0
77 [LMM2022] J012235.9-733813.7 rG 01 22 35.90 -73 38 13.7           ~ 1 0
78 NAME SMC B0121-7530 rG 01 22 56.88 -75 15 07.8           ~ 9 1
79 [LMM2022] J012348.7-735034.0 rG 01 23 48.70 -73 50 34.0           ~ 1 0
80 PMN J0124-7351 rG 01 23 49.6 -73 50 40           ~ 8 1
81 [HFP2000] 724 rG 01 24 29.7 -75 22 43           ~ 2 0
82 [LMM2022] J012536.5-735632.1 rG 01 25 36.50 -73 56 32.1           ~ 1 0
83 SUMSS J012600-735418 rG 01 26 00.2 -73 54 18           ~ 4 1
84 PMN J0128-7512 rG 01 28 08.69 -75 12 51.1           ~ 7 1
85 [MGS2008] 015 rG 01 28 16.990 -75 12 58.75           ~ 2 0
86 [GQH2007] 52 QSO 01 29 30.1616033112 -73 33 10.678747932           ~ 6 0
87 PSR J0131-7310 Psr 01 31 28.510 -73 10 09.34           ~ 14 0
88 GLEAM J013145-734948 rG 01 31 47.4 -73 49 42           ~ 3 1
89 [LMM2022] J013244.0-734414.7 rG 01 32 44.00 -73 44 14.7           ~ 1 0
90 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1934 1
91 PKS 0252-712 rG 02 52 46.15578 -71 04 35.2742   19.0 19.0     ~ 104 1
92 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
93 NAME Magellanic Bridge HI 03 11 -77.5           ~ 522 1
94 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
95 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
96 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
97 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
98 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
99 NAME Local Group GrG ~ ~           ~ 9325 0

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