2010A&A...513A..65N

Query : 2010A&A...513A..65N

2010A&A...513A..65N - Astronomy and Astrophysics, volume 513, A65-65 (2010/4-1)

The large-scale magnetic field in the fourth Galactic quadrant.

NOTA T. and KATGERT P.

Abstract (from CDS):

We have re-examined the published rotation measures (RMs) of extragalactic point sources and pulsars with |b|<3° to study the magnetic field in the fourth Galactic quadrant. We reduced the influence of structure in electron density as much as possible by excluding objects for which Hα-data indicate large fluctuations in ne somewhere along the line of sight. We also excluded objects for which the RM may have been significantly ``corrupted'' by an intervening supernova remnant. We modeled RM(l), the longitude dependence of RM of the unaffected extragalactic sources and pulsars. We assumed several geometries for the large-scale field. All but one of those are based on logarithmic spiral arms (with various pitch angles and widths), while one has circular symmetry. We also made different assumptions about the large-scale ne-distribution. The data suggest the following generic behaviour of the large-scale field in the 4th Galactic quadrant. The field is most likely organized along logarithmic spiral arms and shows two significant reversals: from the Norma arm (CCW field) to the Norma-Crux interarm region (CW field), and from the Norma-Crux interarm region to the Crux arm (CCW field). The present data do not constrain the field in and beyond the Crux-Carina interarm region. Although the models give a good description of the global character of RM(l), individual RM-estimates deviate by typically 15 times their measurement errors. We argue that these large deviations are most likely due to the ``small-scale'' field that dominates on scales of up to several hundred pc. The picture that emerges is thus of a field that has significant structure on smaller scales, but for which the average values in arms and interarm regions are nevertheless well-defined. In addition, this smaller-amplitude large-scale field appears to reverse at each arm-interarm boundary that we can study with the present data. We briefly discuss the link between these results and theoretical predictions.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: structure - ISM: magnetic fields

VizieR on-line data: <Available at CDS (J/A+A/513/A65): table2.dat table4.dat table3.dat table5.dat notes.dat>

Nomenclature: Tables 2, 4: [NK2010] GLLL.ll+BB.bb N=57+36.

Simbad objects: 219

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Number of rows : 219
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1513 0
2 GUM 10 HII 08 16 16.8 -35 37 58           ~ 32 0
3 PSR B0818-41 Psr 08 20 15.4500 -41 14 35.300           ~ 86 0
4 PSR B0826-34 Psr 08 28 16.6 -34 17 07           ~ 156 0
5 PSR J0831-4406 Psr 08 31 32.43 -44 06 11.9           ~ 14 0
6 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1230 2
7 PSR J0834-4159 Psr 08 34 16.3 -41 59 51           ~ 31 0
8 PSR J0835-3707 Psr 08 35 03.08 -37 07 51.5           ~ 13 0
9 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2315 1
10 PSR B0835-41 Psr 08 37 21.1943 -41 35 14.563     12.69     ~ 136 0
11 BRAN 166 HII 08 38 08.0 -40 17 53           ~ 29 1
12 GRS G263.00 +01.40 HII 08 51.3 -42 05           ~ 15 0
13 NAME Vela Jr SN BL? 08 52.0 -46 20           ~ 474 2
14 PSR J0855-4658 Psr 08 55 19.57 -46 58 22.6           ~ 6 0
15 PSR J0855-4644 Psr 08 55 36.160 -46 44 13.46           ~ 52 1
16 PSR J0857-4424 Psr 08 57 55.8823806144 -44 24 10.616717376           ~ 31 0
17 PSR J0901-4624 Psr 09 01 40.110 -46 24 48.45           ~ 26 0
18 PSR B0903-42 Psr 09 04 59.2 -42 46 14           ~ 28 0
19 PSR J0904-4546 Psr 09 05 23.90 -45 36 53.0           ~ 19 0
20 PSR J0905-5127 Psr 09 05 51.922 -51 27 48.71           ~ 42 0
21 PSR B0906-49 Psr 09 08 35.4290 -49 13 05.060           ~ 148 0
22 PSR J0922-4949 Psr 09 22 14.961 -49 49 12.08           ~ 8 0
23 PSR B0922-52 Psr 09 24 08.69 -53 02 44.2           ~ 38 0
24 PSR B0932-52 Psr 09 34 28.2100 -52 49 27.400           ~ 42 0
25 PSR J0940-5428 Psr 09 40 58.22 -54 28 40.6           ~ 49 0
26 PSR J0941-5248 Psr 09 41 41.147 -52 44 04.48           ~ 12 0
27 PSR B0940-55 Psr 09 42 15.83 -55 52 52.3           ~ 86 0
28 PSR B0941-56 Psr 09 42 54.4240 -56 57 43.210           ~ 44 0
29 PSR J0954-5430 Psr 09 54 06.04 -54 30 53.5           ~ 26 0
30 PSR B0953-52 Psr 09 55 29.4740 -53 04 16.570           ~ 39 0
31 SNR G279.0+01.1 SNR 09 57.7 -53 15           ~ 30 0
32 NAME Car Arm PoG 10 00 -60.0           ~ 439 1
33 PSR J1000-5149 Psr 10 00 28.141 -51 49 58.12           ~ 7 0
34 PSR J1001-5559 Psr 10 01 08.4449537832 -55 59 01.424199516           ~ 12 0
35 PSR B0959-54 Psr 10 01 37.7941120344 -55 07 08.599924956           ~ 95 0
36 BRAN 285 HII 10 05 02.9 -58 39 22           ~ 12 0
37 [BHG2007] G282.07-0.78 Rad 10 08 36.2 -56 54 09           ~ 2 0
38 PSR B1011-58 Psr 10 12 48.4800 -58 57 48.700           ~ 27 0
39 PSR J1013-5934 Psr 10 13 31.8350 -59 34 26.630           ~ 15 0
40 PSR J1014-5719 Psr 10 15 37.96 -57 19 12.8           ~ 37 0
41 PSR J1016-58 Psr 10 16 21.266 -58 57 11.70           ~ 118 3
42 PSR B1014-53 Psr 10 16 31.20 -53 45 13.8           ~ 32 0
43 PSR B1015-56 Psr 10 17 12.8310 -56 21 30.520     14.40     ~ 40 0
44 PSR J1019-5749 Psr 10 19 52.14 -57 49 05.9           ~ 40 0
45 PSR J1020-5921 Psr 10 20 14.03 -59 21 34.0           ~ 11 0
46 GUM 29 HII 10 24 14.6 -57 46 58           ~ 210 0
47 NGC 3293 OpC 10 35 52.8 -58 13 52           ~ 312 0
48 PSR B1036-58 Psr 10 38 19.700 -58 31 27.18           ~ 24 0
49 PSR B1039-55 Psr 10 42 00.4900 -55 21 06.200           ~ 28 0
50 PSR J1043-6116 Psr 10 43 55.29 -61 16 50.8           ~ 25 0
51 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1014 2
52 PSR B1044-57 Psr 10 46 18.8100 -58 13 52.000           ~ 35 0
53 PSR B1046-58 Psr 10 48 13.0500 -58 32 06.200           ~ 268 0
54 PSR J1049-5833 Psr 10 49 50.34 -58 33 44.6           ~ 17 0
55 PSR J1054-5943 Psr 10 54 57.7271459328 -59 43 12.597413196           ~ 9 0
56 PSR B1054-62 Psr 10 56 25.5840 -62 58 47.690           ~ 79 0
57 BRAN 328A HII 10 56 32.5 -63 00 46           ~ 20 0
58 PSR B1056-57 Psr 10 59 00.8700 -57 42 14.500           ~ 41 0
59 BRAN 337 HII 11 02 56.1 -59 29 16           ~ 17 0
60 PSR J1103-6025 Psr 11 03 31.480 -60 25 36.39           ~ 10 0
61 PSR J1105-6107 Psr 11 05 26.1400 -61 07 48.940           ~ 114 0
62 PSR J1112-6103 Psr 11 12 14.81 -61 03 31.1           ~ 68 0
63 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1065 1
64 PSR J1117-6154 Psr 11 17 23.81 -61 54 22.0           ~ 9 0
65 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 403 1
66 SNR G292.2-00.5 SNR 11 19.3 -61 28           ~ 90 1
67 PSR J1123-6102 Psr 11 23 41.70 -61 02 06.2           ~ 11 0
68 PSR J1123-6256 Psr 11 23 55.549 -62 59 10.74           ~ 32 0
69 PSR B1124-60 Psr 11 26 52.608 -60 54 39.96           ~ 25 0
70 PSR B1131-62 Psr 11 33 51.45 -62 50 50.6           ~ 25 0
71 SNR G293.8+00.6 SNR 11 35 00 -60 54.0           ~ 35 0
72 IC 2944 OpC 11 38 20.00 -63 22 22.0           ~ 184 0
73 PSR J1138-6207 Psr 11 38 21.62 -62 07 59.3           ~ 22 0
74 PSR B1143-60 Psr 11 46 07.7220 -60 30 59.490           ~ 43 0
75 SNR G296.1-00.5 SNR 11 51 10 -62 34.0           ~ 53 0
76 PSR B1154-62 Psr 11 57 15.2070 -62 24 50.930           ~ 105 0
77 PSR J1159-6409 Psr 11 59 21.7 -64 09 57           ~ 7 0
78 PSR J1211-6324 Psr 12 11 24.18 -63 24 45.2           ~ 5 0
79 [BHG2007] G299.42-0.23 Rad 12 20 29.8 -62 53 37           ~ 2 0
80 PSR B1221-63 Psr 12 24 22.2740 -64 07 53.834           ~ 110 0
81 PSR J1224-6208 Psr 12 24 44.25 -62 08 41.1           ~ 5 0
82 PSR B1222-63 Psr 12 25 42.8 -64 08 43           ~ 32 0
83 NAME Crux Arm PoG 12 30 -60.0           ~ 88 0
84 PSR J1231-6303 Psr 12 31 13.0 -63 03 18           ~ 8 0
85 PSR B1240-64 Psr 12 43 17.2912183824 -64 23 23.082548820           ~ 109 0
86 PSR J1252-6314 Psr 12 52 42.62 -63 14 32.7           ~ 8 0
87 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 790 0
88 PSR J1301-6305 Psr 13 02 47.9992676 -63 10 48.001099           ~ 124 2
89 PSR J1305-6203 Psr 13 05 20.90 -62 03 21.6           ~ 21 0
90 PSR B1302-64 Psr 13 05 23.4465832752 -64 55 28.043393052           ~ 39 0
91 PSR J1307-6318 Psr 13 07 54.7 -63 18 35           ~ 12 0
92 PSR J1312-6400 Psr 13 12 07.16 -64 00 55.6           ~ 8 0
93 PSR J1317-6302 Psr 13 17 44.69 -63 02 52.2           ~ 14 0
94 PSR B1316-60 Psr 13 19 20.2400 -60 56 46.700           ~ 23 0
95 PSR J1322-6241 Psr 13 22 32.15 -62 41 53.5           ~ 7 0
96 PSR J1324-6146 Psr 13 24 43.9 -61 46 00           ~ 6 0
97 PSR J1327-6301 Psr 13 27 07.4600 -63 01 15.450           ~ 28 0
98 PSR J1327-6400 Psr 13 27 10.27 -64 00 13.1           ~ 20 0
99 PSR B1323-62 Psr 13 27 17.1760 -62 22 45.460           ~ 87 0
100 PSR B1334-61 Psr 13 38 09.35 -62 04 18.7           ~ 26 0
101 PSR B1336-64 Psr 13 40 00.32 -64 56 42.9           ~ 38 0
102 SNR G308.7+00.0 SNR 13 41 00.9 -62 14 28           ~ 31 0
103 PSR J1341-6023 Psr 13 41 07.37 -60 23 34.7           ~ 9 0
104 PSR B1338-62 Psr 13 41 42.63 -62 20 20.7           ~ 137 1
105 SNR G308.8-00.1 SNR 13 42 30 -62 23.0           ~ 46 1
106 PMN J1342-6124 Rad 13 43 00.9 -61 24 52           ~ 2 0
107 PSR J1345-6115 Psr 13 45 44.43 -61 15 30.6           ~ 11 0
108 PSR J1347-5947 Psr 13 47 19.5906773016 -59 47 39.516218700           ~ 8 0
109 PSR J1349-6130 Psr 13 49 36.65 -61 30 17.1           ~ 27 0
110 PSR J1355-6206 Psr 13 55 21.3011056920 -62 06 19.419702480           ~ 12 0
111 PSR J1357-6429 Psr 13 57 02.525 -64 29 29.89           ~ 151 1
112 PSR B1354-62 Psr 13 57 25.0 -62 28 00           ~ 38 0
113 PSR B1356-60 Psr 13 59 58.2480 -60 38 07.550           ~ 115 0
114 PSR B1358-63 Psr 14 01 52.5900 -63 57 45.400           ~ 73 0
115 PSR J1403-6310 Psr 14 03 14.0 -63 10 27           ~ 6 0
116 PSR J1406-6121 Psr 14 06 50.04 -61 21 27.9           ~ 26 0
117 [BHG2007] G312.37-0.04 Rad 14 11 37.1 -61 25 54           ~ 2 0
118 PSR J1412-6145 Psr 14 12 07.69 -61 45 28.8           ~ 40 1
119 PSR J1413-6222 Psr 14 13 05.6681388864 -62 22 28.958729916           ~ 7 0
120 PSR J1413-6141 Psr 14 13 09.87 -61 41 13.0           ~ 39 1
121 PSR B1409-62 Psr 14 13 31.316 -63 07 35.45           ~ 34 0
122 PSR J1416-6037 Psr 14 16 30.59 -60 37 59.5           ~ 8 0
123 PSR J1420-6048 Psr 14 20 08.190 -60 48 14.85           ~ 196 0
124 PSR J1424-5822 Psr 14 24 32.09 -58 22 54.1           ~ 13 0
125 PSR J1452-6036 Psr 14 52 51.890 -60 36 31.37           ~ 26 0
126 PSR J1452-5851 Psr 14 52 52.58 -58 51 13.3           ~ 19 0
127 SNR G318.2+00.1 SNR 14 54.8 -59 04           ~ 31 0
128 PSR J1502-5828 Psr 15 02 43.8 -58 28 42           ~ 4 0
129 PSR B1508-57 Psr 15 12 43.0270 -58 00 00.200           ~ 42 0
130 PSR B1509-58 Psr 15 13 55.52 -59 08 08.8     13.06     ~ 844 1
131 PSR J1513-5739 Psr 15 13 58.99 -57 39 01.4           ~ 8 0
132 PSR B1518-58 Psr 15 22 42.2600 -58 29 03.100           ~ 30 0
133 SNR G321.9-01.1 SNR 15 23.7 -58 13           ~ 17 0
134 PSR B1523-55 Psr 15 27 40.7500 -55 52 08.300           ~ 29 0
135 PSR J1530-5327 Psr 15 30 26.87 -53 27 56.3           ~ 27 0
136 PSR J1531-5610 Psr 15 31 27.91 -56 10 55.0           ~ 51 0
137 PSR B1530-53 Psr 15 34 08.3012586672 -53 34 20.547404184           ~ 71 0
138 PSR B1530-53.9 Psr 15 34 33.59 -54 05 39.7           ~ 28 0
139 PSR J1536-5433 Psr 15 36 04.82 -54 33 15.0           ~ 14 0
140 PSR B1535-56 Psr 15 39 14.1090 -56 26 26.300           ~ 55 0
141 PSR J1540-5736 Psr 15 40 59.02 -57 36 57.0           ~ 4 0
142 PSR J1541-5535 Psr 15 41 49.6 -55 35 01           ~ 22 0
143 PSR J1543-5459 Psr 15 43 56.25 -54 59 13.7           ~ 21 0
144 PSR B1541-52 Psr 15 44 59.8380 -53 08 46.930           ~ 45 0
145 PSR J1546-5302 Psr 15 46 07.4618170248 -53 02 23.007046776           ~ 7 0
146 PSR J1548-5607 Psr 15 48 43.8746461512 -56 07 35.458209840           ~ 25 0
147 PSR J1550-5242 Psr 15 50 02.95 -52 42 07.0           ~ 6 0
148 PSR J1556-5358 Psr 15 56 51.5 -53 58 55           ~ 6 0
149 PSR B1555-55 Psr 15 59 21.3 -55 45 40     13.40     ~ 29 0
150 NAME Nor Arm PoG 16 00 -50.0           ~ 430 0
151 PSR B1557-50 Psr 16 00 53.0150 -50 44 21.300           ~ 107 0
152 SNR G329.7+00.4 SNR 16 01.3 -52 18           ~ 19 0
153 PSR J1601-5335 Psr 16 01 54.91 -53 35 43.2           ~ 22 0
154 PSR B1558-50 Psr 16 02 18.7300 -51 00 06.100           ~ 93 0
155 PSR B1600-49 Psr 16 04 22.9760 -49 09 57.980     13.00     ~ 72 0
156 PSR B1601-52 Psr 16 05 16.2500 -52 57 34.500           ~ 58 0
157 PSR J1610-5303 Psr 16 10 12.82 -53 03 49.0           ~ 4 0
158 PSR J1610-5006 Psr 16 10 44.30 -50 06 42.2           ~ 9 0
159 PSR B1607-52 Psr 16 11 03.20 -52 09 23.6           ~ 43 0
160 PSR J1611-4949 Psr 16 11 46.48 -49 49 57.1           ~ 7 0
161 PSR B1609-47 Psr 16 13 28.9900 -47 14 26.900     13.87     ~ 34 0
162 PSR J1614-5048 Psr 16 14 11.29 -50 48 03.5           ~ 121 0
163 PSR J1615-5444 Psr 16 15 01.191 -54 44 32.40           ~ 9 0
164 PSR J1618-4723 Psr 16 18 06.80 -47 23 19.1           ~ 9 0
165 [BHG2007] G333.72-0.27 Rad 16 22 55.5 -50 03 31           ~ 2 0
166 PSR J1623-4949 Psr 16 23 54.80 -49 49 04.0           ~ 9 0
167 PSR J1628-4804 Psr 16 28 26.83 -48 04 59.0           ~ 8 0
168 PSR J1630-4719 Psr 16 30 02.47 -47 19 42.0           ~ 7 0
169 PSR B1627-47 Psr 16 30 37.6175969280 -47 33 04.226971788           ~ 23 0
170 PSR J1632-48 Psr 16 32 39.94 -48 18 52.8           ~ 33 0
171 PSR B1629-50 Psr 16 33 00.0830 -50 15 08.400           ~ 30 0
172 PSR B1630-44 Psr 16 33 47.048 -44 53 07.80           ~ 25 0
173 PSR J1635-4944 Psr 16 35 55.4 -49 44 36           ~ 6 0
174 PSR J1637-4642 Psr 16 37 13.77 -46 42 15.0           ~ 34 0
175 PSR B1634-45 Psr 16 37 58.710 -45 53 27.30           ~ 54 0
176 PSR J1638-4608 Psr 16 38 22.98 -46 08 11.6           ~ 27 0
177 PSR J1639-4359 Psr 16 39 06.85 -43 59 52.0           ~ 7 0
178 PSR B1635-45 Psr 16 39 21.201 -46 04 33.10           ~ 23 0
179 PSR B1636-47 Psr 16 40 13.19 -47 15 35.3           ~ 31 0
180 PSR B1641-45 Psr 16 44 49.28482 -45 59 09.6360     12.60     ~ 198 0
181 PSR B1643-43 Psr 16 46 50.86 -43 45 53.7           ~ 71 1
182 SNR G341.2+00.9 SNR 16 47.6 -43 47           ~ 30 1
183 PSR J1648-4611 Psr 16 48 22.02 -46 11 16.0           ~ 65 0
184 PSR J1649-4349 Psr 16 49 20.42 -43 49 22.2           ~ 23 0
185 PSR J1650-4502 Psr 16 50 32.30 -45 02 37.3           ~ 18 0
186 PSR B1648-42 Psr 16 51 48.7700 -42 46 09.400           ~ 61 0
187 GUM 55 HII 16 53 -42.2           ~ 26 0
188 PSR J1653-4249 Psr 16 53 40.22 -42 49 03.3           ~ 15 0
189 PSR B1658-37 Psr 17 01 18.4100 -37 26 25.000           ~ 34 0
190 PSR B1657-45 Psr 17 01 29.1990439488 -45 33 49.764931128           ~ 25 0
191 PSR J1702-4310 Psr 17 02 26.94 -43 10 41.5           ~ 29 0
192 PSR J1705-4108 Psr 17 05 20.4 -41 08 44           ~ 10 0
193 PSR B1703-40 Psr 17 07 21.7500 -40 53 57.000           ~ 48 0
194 SNR G343.1-02.3 SNR 17 08.0 -44 16           ~ 77 1
195 PSR B1706-44 Psr 17 09 42.7460 -44 29 07.200     13.30     ~ 640 1
196 PSR J1715-3903 Psr 17 15 14.3 -39 03 02           ~ 25 0
197 PSR J1717-4043A Psr 17 17 02.0 -40 43 31           ~ 8 0
198 PSR B1714-34 Psr 17 17 20.244 -34 24 59.60           ~ 44 0
199 GRS G352.50 +02.10 HII 17 17.5 -34 09           ~ 8 0
200 PSR J1718-3825 Psr 17 18 13.558 -38 25 17.83           ~ 97 0
201 PSR B1715-40 Psr 17 19 01.722 -40 06 59.50           ~ 24 0
202 PSR J1720-3659 Psr 17 20 02.0050309104 -36 59 07.478417112           ~ 7 0
203 GRS G349.80 -00.50 HII 17 21.2 -38 12           ~ 7 0
204 PSR B1718-35 Psr 17 21 32.76 -35 32 48.3           ~ 77 0
205 PSR B1718-32 Psr 17 22 02.9590 -32 07 45.300           ~ 90 0
206 PSR B1718-36 Psr 17 22 09.817 -36 32 53.30           ~ 27 0
207 PSR B1719-37 Psr 17 22 59.2390 -37 12 03.700           ~ 98 0
208 PSR J1723-3659 Psr 17 23 07.580 -36 59 13.90           ~ 36 0
209 NVSS J172356-354340 Rad 17 23 56.7 -35 43 39           ~ 6 0
210 PSR B1727-33 Psr 17 30 32.559 -33 50 39.40           ~ 119 1
211 RCW 132 HII 17 33 -32.7           ~ 11 0
212 PSR B1730-37 Psr 17 33 26.754 -37 16 54.60           ~ 46 0
213 PSR B1734-35 Psr 17 37 40.039 -35 55 43.80           ~ 30 0
214 PSR B1735-32 Psr 17 38 54.185 -32 11 53.60           ~ 35 0
215 PSR B1736-31.4 Psr 17 39 24.304 -31 31 15.30           ~ 35 0
216 PSR B1740-31 Psr 17 43 36.7000 -31 50 21.000           ~ 53 0
217 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14407 0
218 PSR B1747-31 Psr 17 50 47.31 -31 57 44.3           ~ 36 0
219 NAME Scutum Spiral Arm PoG ~ ~           ~ 351 0

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