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IMA03 - Linear Polarization Observations of Water Masers in W3 IRS 5
Interferometry data
Short title
: Imai et al. (2003)
Authors
: Imai, HiroshiHoriuchi, ShinjiDeguchi, ShujiKameya, Osamu
Journal
: The Astrophysical Journal, Volume 595, Issue 1, pp. 285-293.
Bibcode
:
2003ApJ...595..285I
Target type
: High_mass_SFR
Abstract
We present a magnetic field mapping of water maser clouds in the star-forming region W3 IRS 5, which has been made on the basis of the linear polarization VLBI observation. Using the Very Long Baseline Array at 22.2 GHz, 16 of 61 detected water masers were found to be linearly polarized with polarization degrees up to 13%. Although 10 polarized features were widely distributed in the whole W3 IRS 5 water maser region, they had position angles similar to the magnetic field vectors (~75° east from the north). The magnetic field vectors are roughly perpendicular to the spatial alignments of the maser features. They are consistent with the hourglass model of the magnetic field, which was previously proposed to explain the magnetic field in the whole W3 Main region (r~0.1 pc). They are, on the other hand, not aligned to the directions of maser feature proper motions observed previously. This implies that the W3 IRS 5 magnetic field was controlled by a collapse of the W3 Main molecular cloud rather than by the outflow originated from W3 IRS 5.
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Detection table from Imai et al. (2003)
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individual components
ID
Obs. RA
Obs. Dec
RA offset
Dec offset
l
b
Group id
#
Source name
Image
Descr.
Line
V
peak
F
peak
Telescope
V
step
RMS
Beam
PA
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
H
2
O
(km/s)
(Jy/beam)
(km/s)
(mJy/beam)
(arcsec)
(deg.)
Yes
/
No
(kpc)
1
+02 25 40.7635
+62 05 52.643
133.715119
1.215518
G133.715+1.215
W3 IRS 5
Image
Descr
22 GHz
;
-56 .. -6.8
0.01 .. 111.05
VLBA
0.42
30.000
0.00068 x 0.00049
3.3
+H
2
O
-CH
3
OH I
+CH
3
OH II
+OH
SFR
1998 Nov 21
+02 25 40.7634
+62 05 52.6449
-1.5 mas
3.33 mas
133.715118
1.215518
1
W3 IRS 5
-56
0.04
+02 25 40.8352
+62 05 53.6579
1075.72 mas
1016.29 mas
133.715149
1.215831
2
W3 IRS 5
-43.1
18.41
+02 25 40.7375
+62 05 51.9803
-389.93 mas
-661.34 mas
133.715137
1.215327
3
W3 IRS 5
-42.9
7.78
+02 25 40.7635
+62 05 52.6406
0.08 mas
-0.99 mas
133.715119
1.215517
4
W3 IRS 5
-42.6
6.95
+02 25 40.7634
+62 05 52.645
-1.49 mas
3.36 mas
133.715118
1.215518
5
W3 IRS 5
-42.1
111.05
+02 25 40.7376
+62 05 51.976
-388.32 mas
-665.56 mas
133.715138
1.215326
6
W3 IRS 5
-42
9.6
+02 25 40.7376
+62 05 51.9699
-388.08 mas
-671.67 mas
133.715138
1.215325
7
W3 IRS 5
-41.7
3.63
+02 25 40.7347
+62 05 52.0211
-431.85 mas
-620.46 mas
133.715128
1.215336
8
W3 IRS 5
-41.7
1.48
+02 25 40.7377
+62 05 51.9737
-387.87 mas
-667.89 mas
133.715138
1.215326
9
W3 IRS 5
-41.3
0.5
+02 25 40.7635
+62 05 52.6415
-0.01 mas
-0.09 mas
133.715119
1.215517
10
W3 IRS 5
-41.3
26.1
+02 25 40.7623
+62 05 52.6418
-18.42 mas
0.16 mas
133.715117
1.215516
11
W3 IRS 5
-40.7
8.95
+02 25 40.7624
+62 05 52.6398
-17.26 mas
-1.79 mas
133.715117
1.215516
12
W3 IRS 5
-40.5
2.63
+02 25 40.7634
+62 05 52.646
-1.37 mas
4.38 mas
133.715118
1.215518
13
W3 IRS 5
-40.5
8.69
+02 25 40.7635
+62 05 52.6416
0 mas
0 mas
133.715119
1.215517
14
W3 IRS 5
-40.5
79.89
+02 25 40.7634
+62 05 52.6471
-1.66 mas
5.47 mas
133.715118
1.215519
15
W3 IRS 5
-40.3
8.91
+02 25 40.7635
+62 05 52.63
-0.37 mas
-11.64 mas
133.715120
1.215514
16
W3 IRS 5
-40
20.81
+02 25 40.7633
+62 05 52.6468
-3.92 mas
5.23 mas
133.715118
1.215518
17
W3 IRS 5
-39.6
5.05
+02 25 40.7377
+62 05 51.9712
-387.5 mas
-670.38 mas
133.715138
1.215325
18
W3 IRS 5
-39.3
9.99
+02 25 40.7377
+62 05 51.9642
-386.67 mas
-677.37 mas
133.715139
1.215323
19
W3 IRS 5
-38.9
7.25
+02 25 40.7632
+62 05 52.6498
-4.28 mas
8.23 mas
133.715118
1.215519
20
W3 IRS 5
-38.8
5.63
+02 25 40.7633
+62 05 52.6491
-3.78 mas
7.5 mas
133.715118
1.215519
21
W3 IRS 5
-38.8
3.91
+02 25 40.7631
+62 05 52.6503
-6.27 mas
8.67 mas
133.715117
1.215519
22
W3 IRS 5
-38.2
26.49
+02 25 40.7642
+62 05 52.6252
9.72 mas
-16.39 mas
133.715122
1.215513
23
W3 IRS 5
-37.8
11.11
+02 25 40.7377
+62 05 51.9649
-386.73 mas
-676.74 mas
133.715139
1.215324
24
W3 IRS 5
-37.7
0.29
+02 25 40.763
+62 05 52.6548
-7.97 mas
13.24 mas
133.715117
1.215520
25
W3 IRS 5
-37.5
1.88
+02 25 40.7629
+62 05 52.6557
-9.2 mas
14.11 mas
133.715116
1.215520
26
W3 IRS 5
-36.9
2.14
+02 25 40.816
+62 05 54.4343
786.55 mas
1792.69 mas
133.715037
1.216019
27
W3 IRS 5
-36.7
10.01
+02 25 40.8167
+62 05 54.3916
797.51 mas
1750.03 mas
133.715043
1.216008
28
W3 IRS 5
-36.2
0.56
+02 25 40.8157
+62 05 54.4436
783.13 mas
1802.02 mas
133.715036
1.216021
29
W3 IRS 5
-35.8
14.81
+02 25 40.816
+62 05 54.4358
787.03 mas
1794.17 mas
133.715037
1.216019
30
W3 IRS 5
-35.5
91.1
+02 25 40.7854
+62 05 50.6399
328.54 mas
-2001.74 mas
133.715357
1.215013
31
W3 IRS 5
-35
2.24
+02 25 40.8166
+62 05 54.392
796.47 mas
1750.38 mas
133.715043
1.216008
32
W3 IRS 5
-35
0.53
+02 25 40.7358
+62 05 52.0415
-416.12 mas
-600.11 mas
133.715128
1.215342
33
W3 IRS 5
-34.6
11.55
+02 25 40.7634
+62 05 52.6449
-1.46 mas
3.3 mas
133.715118
1.215518
34
W3 IRS 5
-34.6
0.11
+02 25 40.7635
+62 05 52.6416
-0.02 mas
-0.02 mas
133.715119
1.215517
35
W3 IRS 5
-34.6
0.06
+02 25 40.7631
+62 05 52.6501
-6.21 mas
8.51 mas
133.715117
1.215519
36
W3 IRS 5
-34.6
0.08
+02 25 40.8165
+62 05 54.3928
794.01 mas
1751.23 mas
133.715042
1.216009
37
W3 IRS 5
-34.5
2.1
+02 25 40.8165
+62 05 54.3925
794.65 mas
1750.92 mas
133.715042
1.216008
38
W3 IRS 5
-34.1
0.23
+02 25 40.7832
+62 05 50.6166
295.92 mas
-2025 mas
133.715355
1.215005
39
W3 IRS 5
-33.9
0.94
+02 25 40.7832
+62 05 50.6158
294.72 mas
-2025.82 mas
133.715355
1.215005
40
W3 IRS 5
-33.8
4.43
+02 25 40.7831
+62 05 50.6145
293.69 mas
-2027.11 mas
133.715355
1.215005
41
W3 IRS 5
-33.7
1.06
+02 25 40.7857
+62 05 50.637
331.95 mas
-2004.59 mas
133.715357
1.215012
42
W3 IRS 5
-33.7
6.95
+02 25 40.7852
+62 05 50.642
325.76 mas
-1999.6 mas
133.715356
1.215013
43
W3 IRS 5
-33.6
21.89
+02 25 40.7857
+62 05 50.6367
332.52 mas
-2004.95 mas
133.715358
1.215012
44
W3 IRS 5
-33.3
4.25
+02 25 40.7358
+62 05 52.0392
-415.21 mas
-602.42 mas
133.715128
1.215342
45
W3 IRS 5
-33.2
1
+02 25 40.7858
+62 05 50.6356
334.25 mas
-2006.04 mas
133.715358
1.215012
46
W3 IRS 5
-33.1
10.9
+02 25 40.7358
+62 05 52.0374
-415.45 mas
-604.25 mas
133.715128
1.215341
47
W3 IRS 5
-33
3.84
+02 25 40.7852
+62 05 50.6427
324.56 mas
-1998.9 mas
133.715356
1.215013
48
W3 IRS 5
-32.9
13.12
+02 25 40.7852
+62 05 50.6427
324.99 mas
-1998.91 mas
133.715356
1.215013
49
W3 IRS 5
-32.4
6.56
+02 25 40.8166
+62 05 54.3921
795.87 mas
1750.48 mas
133.715043
1.216008
50
W3 IRS 5
-32.3
1.93
+02 25 40.7853
+62 05 50.642
326.65 mas
-1999.6 mas
133.715356
1.215013
51
W3 IRS 5
-32
0.19
+02 25 40.7856
+62 05 50.6371
331.83 mas
-2004.52 mas
133.715357
1.215012
52
W3 IRS 5
-31.2
0.05
+02 25 40.7802
+62 05 50.5617
249.87 mas
-2079.93 mas
133.715355
1.214989
53
W3 IRS 5
-30.4
4.02
+02 25 40.7787
+62 05 50.558
228.02 mas
-2083.62 mas
133.715353
1.214987
54
W3 IRS 5
-29.9
1.05
+02 25 40.7789
+62 05 50.5582
230.35 mas
-2083.38 mas
133.715353
1.214987
55
W3 IRS 5
-29.9
0.44
+02 25 40.7788
+62 05 50.5581
229.26 mas
-2083.48 mas
133.715353
1.214987
56
W3 IRS 5
-29.9
0.01
+02 25 40.7787
+62 05 50.5581
227.05 mas
-2083.52 mas
133.715353
1.214987
57
W3 IRS 5
-29.9
1.09
+02 25 40.7852
+62 05 50.642
325.72 mas
-1999.57 mas
133.715356
1.215013
58
W3 IRS 5
-29.6
0.06
+02 25 40.8165
+62 05 54.3924
795.39 mas
1750.8 mas
133.715043
1.216008
59
W3 IRS 5
-29.5
0.13
+02 25 40.7299
+62 05 50.2646
-503.83 mas
-2377.04 mas
133.715293
1.214877
60
W3 IRS 5
-23.8
0.58
+02 25 40.7498
+62 05 50.8113
-205.57 mas
-1830.29 mas
133.715275
1.215033
61
W3 IRS 5
-6.8
1.32
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select MAX(h2o_data_all.ra_hms) as ra_hms,MAX(h2o_data_all.dec_dms) as dec_dms,MAX(h2o_data_all.source_name) as source_name,MAX(h2o_data_all.ra) as ra,MAX(h2o_data_all.dec) as dec,MAX(h2o_data_all.l) as l,MAX(h2o_data_all.b) as b,MAX(h2o_data_all.grp) as grp,MAX(h2o_data_all.other_name) as other_name,MAX(h2o_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(h2o_data_all.line) as line,MAX(h2o_data_all.vrange) as vrange,MAX(h2o_data_all.vpeak) as vpeak,MAX(h2o_data_all.peak) as peak,MAX(h2o_data_all.fwhm) as fwhm,MAX(h2o_data_all.int) as int,MAX(h2o_data_all.rms) as rms,MAX(h2o_data_all.units) as units,MAX(h2o_data_all.units_rms) as units_rms,MAX(h2o_data_all.date_txt) as date_txt,MAX(h2o_data_all.telescope_ref) as telescope_ref,MAX(h2o_data_all.telescope_conf) as telescope_conf,MAX(h2o_data_all.v_step) as v_step,MAX(h2o_data_all.beam) as beam,MAX(h2o_data_all.beam_maj) as beam_maj,MAX(h2o_data_all.beam_min) as beam_min,MAX(h2o_data_all.beam_pa) as beam_pa,MAX(h2o_data_all.ref) as ref,MAX(h2o_data_all.list_ref) as list_ref,MAX(h2o_data_all.ascii) as ascii,MAX(h2o_data_all.url) as url,MAX(h2o_data_all.image) as image,MAX(h2o_data_all.image2) as image2,MAX(h2o_data_all.image3) as image3,MAX(h2o_data_all.descr) as descr,MAX(h2o_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(h2o_data_all.dist) as dist,1 as dist_parallax,MAX(h2o_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM h2o_data_all LEFT JOIN all_objects_withmet ON h2o_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON h2o_data_all.line=transitions."Line" WHERE ref ilike 'IMA03' AND detected=true AND hide=false GROUP BY ref
select h2o_data_all.ra_hms,h2o_data_all.dec_dms,h2o_data_all.source_name,h2o_data_all.ra,h2o_data_all.dec,h2o_data_all.l,h2o_data_all.b,h2o_data_all.grp,h2o_data_all.other_name,h2o_data_all.other_desc,h2o_data_all.thermal,h2o_data_all.line,h2o_data_all.vrange,h2o_data_all.vpeak,h2o_data_all.peak,h2o_data_all.fwhm,h2o_data_all.int,h2o_data_all.rms,h2o_data_all.units,h2o_data_all.units_rms,h2o_data_all.date_txt,h2o_data_all.telescope_ref,h2o_data_all.telescope_conf,h2o_data_all.v_step,h2o_data_all.beam,h2o_data_all.beam_maj,h2o_data_all.beam_min,h2o_data_all.beam_pa,h2o_data_all.ref,h2o_data_all.list_ref,h2o_data_all.ascii,h2o_data_all.url,h2o_data_all.image,h2o_data_all.image2,h2o_data_all.image3,h2o_data_all.descr,h2o_data_all.id,h2o_data_all.mjy_flag,h2o_data_all.rms_mjy_flag,h2o_data_all.dist,h2o_data_all.dist_parallax,h2o_data_all.date_txt,line_det,type,simbad_types_cat FROM h2o_data_all LEFT JOIN all_objects_withmet ON h2o_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON h2o_data_all.line=transitions."Line" WHERE ref ilike 'IMA03' AND detected=true AND hide=false ORDER BY detected DESC,id
