2015ApJ...806...94G

Query : 2015ApJ...806...94G

2015ApJ...806...94G - Astrophys. J., 806, 94 (2015/June-2)

A new optical polarization catalog for the Small Magellanic Cloud: the magnetic field structure.

GOMES A.L., MAGALHAES A.M., PEREYRA A. and RODRIGUES C.V.

Abstract (from CDS):

We present a new optical polarimetric catalog for the Small Magellanic Cloud (SMC). It contains a total of 7207 stars, located in the northeast (NE) and Wing sections of the SMC and part of the Magellanic Bridge. This new catalog is a significant improvement compared to previous polarimetric catalogs for the SMC. We used it to study the sky-projected interstellar magnetic field structure of the SMC. Three trends were observed for the ordered magnetic field direction at position angles (PAs) of (65°±10°), (115°±10°), and (150°±10°). Our results suggest the existence of an ordered magnetic field aligned with the Magellanic Bridge direction and SMC's Bar in the NE region, which have PAs roughly at 115.°4 and 45°, respectively. However, the overall magnetic field structure is fairly complex. The trends at 115° and 150° may be correlated with the SMC's bimodal structure, observed in Cepheids' distances and HI velocities. We derived a value of µG for the ordered sky-projected magnetic field, and µG for the turbulent magnetic field. This estimate of is significantly larger (by a factor of Å10) than the line of sight field derived from Faraday rotation observations, suggesting that most of the ordered field component is on the plane of the sky. A turbulent magnetic field stronger than the ordered field agrees with observed estimates for other irregular and spiral galaxies. For the SMC the ratio is closer to what is observed for our Galaxy than other irregular dwarf galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: ISM - Magellanic Clouds - magnetic fields - techniques: polarimetric

VizieR on-line data: <Available at CDS (J/ApJ/806/94): table7.dat table8.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 73

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Number of rows : 73
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 Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 [SSH97] 273 sh 01 00 05 -72 39.7           ~ 3 0
4 [MOH2010] NE-1c MoC 01 00 10.0 -71 48 40           ~ 2 0
5 DEM S 107 HII 01 00 15.2 -71 48 25           ~ 10 0
6 [SSH97] 279 sh 01 00 26 -72 05.1           ~ 3 0
7 [SSH97] 285 sh 01 00 46 -72 09.6           ~ 3 0
8 [SSH97] 288 sh 01 01 09 -72 24.6           ~ 3 0
9 [SSH97] 290 sh 01 01 12 -71 52.9           ~ 3 0
10 DEM S 113 HII 01 01 30.3 -71 47 45           ~ 8 0
11 LHA 115-N 72 HII 01 01 30.7 -71 51 08           ~ 14 0
12 [JD2002] 21 PN 01 01 33.6 -72 34 53           ~ 2 0
13 MCELS S-144 HII 01 03 01.2 -72 05 41           ~ 3 0
14 DEM S 119 HII 01 03 01.9 -72 05 17           ~ 5 0
15 [SSH97] 309 sh 01 03 03 -72 03.2           ~ 3 0
16 DEM S 121 HII 01 03 03.1 -71 53 30           ~ 9 0
17 LHA 115-N 76B Em* 01 03 07.73 -72 06 26.9     14.1     ~ 27 0
18 [MOH2010] NE-3g MoC 01 03 10.0 -72 03 50           ~ 2 0
19 SNR B0101-72.6 SNR 01 03 17.4 -72 09 43           ~ 6 0
20 MCELS S-147 HII 01 03 25.0 -72 03 45           ~ 3 0
21 LIN 420 Em* 01 03 48.4675373858 -72 03 53.652613373   16.63 16.24     ~ 33 0
22 MCELS S-148 HII 01 03 48.6 -72 03 56           ~ 3 0
23 [SSH97] 319 sh 01 04 40 -71 53.8           ~ 3 0
24 [SSH97] 321 sh 01 04 42 -72 37.5           ~ 3 0
25 [SSH97] 329 sh 01 05 18 -72 34.4           ~ 3 0
26 [SSH97] 330 sh 01 05 23 -72 38.9           ~ 3 0
27 [SSH97] 344 sh 01 06 46 -72 25.0           ~ 3 0
28 DEM S 134 HII 01 06 48.5 -72 24 32           ~ 8 0
29 [SSH97] 354 sh 01 07 25 -72 54.9           ~ 3 0
30 [SSH97] 355 sh 01 07 30 -72 21.8           ~ 3 0
31 [SSH97] 358 sh 01 07 33 -72 39.9           ~ 3 0
32 SK 132 s*b 01 07 40.3905611664 -72 51 00.061708428 12.08 13.13 13.31 13.30 13.45 O9.5II(n) 49 0
33 [SSH97] 367 sh 01 08 43 -72 38.1           ~ 3 0
34 [SSH97] 373 sh 01 09 20 -73 01.9           ~ 3 0
35 [SSH97] 376 sh 01 09 29 -72 57.4           ~ 3 0
36 [SSH97] 386 sh 01 10 31 -73 03.1           ~ 3 0
37 [SSH97] 387 sh 01 10 33 -73 01.6           ~ 3 0
38 [BLR2008] SMC N83 4 MoC 01 12 05.8 -73 31 01           ~ 2 0
39 [SSH97] 398 sh 01 12 23 -73 28.0           ~ 3 0
40 [BLR2008] SMC N83 2 MoC 01 12 41.3 -73 32 14           ~ 2 0
41 [SSH97] 407 sh 01 13 29 -73 03.6           ~ 3 0
42 [SSH97] 408 sh 01 13 30 -73 03.6           ~ 3 0
43 NAME SMC B0113-7334 Rad 01 14 25.6 -73 19 10           ~ 14 1
44 MCELS S-191 HII 01 14 41.7 -73 18 06           ~ 3 0
45 [MA93] 1796 PN 01 14 47.132 -73 20 13.80     16.5     ~ 14 0
46 DEM S 152 HII 01 14 54.1 -73 19 45           ~ 14 1
47 MCELS S-193 HII 01 14 55.7 -73 20 10           ~ 2 0
48 MCELS S-195 HII 01 15 04.7 -73 19 10           ~ 3 0
49 [SSH97] 423 sh 01 15 29 -73 23.8           ~ 3 0
50 DEM S 157 HII 01 16 14.7 -73 25 42           ~ 10 0
51 DEM S 159 HII 01 17 05.7 -73 12 24           ~ 10 0
52 DEM S 155 HII 01 17.1 -73 14           ~ 8 0
53 [SSH97] 440 sh 01 17 27 -73 12.5           ~ 3 0
54 LHA 115-N 87 PN 01 21 10.6470507816 -73 14 34.846684584   15.94 15.553   16.758 ~ 47 0
55 [SSH97] 472 sh 01 21 40 -73 18.0           ~ 3 0
56 [MSZ2003] 28 sh 01 30 44 -73 49.7           ~ 2 0
57 [MSZ2003] 32 sh 01 31 43 -73 52.4           ~ 2 0
58 HD 9540 PM* 01 33 15.8091072128 -24 10 40.654687460 8.041 7.722 6.963 6.548 6.176 K0V 132 0
59 [MSZ2003] 48 sh 01 41 35 -73 55.2           ~ 2 0
60 [MSZ2003] 49 sh 01 42 36 -73 49.9           ~ 2 0
61 [MSZ2003] 52 sh 01 45 23 -74 30.1           ~ 2 0
62 [MSZ2003] 55 sh 01 46 10 -74 28.4           ~ 2 0
63 [MSZ2003] 88 sh 02 06 37 -74 36.8           ~ 2 0
64 [MSZ2003] 95 sh 02 09 22 -74 24.8           ~ 2 0
65 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
66 NAME Magellanic Bridge HI 03 11 -77.5           ~ 522 1
67 HD 23512 PM* 03 46 34.1921924832 +23 37 26.494987584 8.72 8.44 8.09 7.79 7.49 A2V 158 0
68 HD 283812 * 04 44 24.9210299331 +25 31 42.390958427   10.24 9.5     A2 55 0
69 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
70 NGC 2100 Cl* 05 42 07.200 -69 12 26.99           ~ 195 0
71 NAME IRAS Vela Shell IR 07 44 -42.4           ~ 42 0
72 HD 298383 * 09 22 29.7726126312 -52 28 57.297210744   10.34 9.75     A0Ib 35 0
73 NAME Local Group GrG ~ ~           ~ 9325 0

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