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OH
HUT05 - OH maser disc and magnetic field structure in AFGL 2591
Interferometry data
Short title
: Hutawarakorn & Cohen (2005)
Authors
: Hutawarakorn, B.Cohen, R. J.
Journal
: Monthly Notices of the Royal Astronomical Society, Volume 357, Issue 1, pp. 338-344.
Bibcode
:
2005MNRAS.357..338H
PDF
:
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Target type
: High_mass_SFR
Observations category
: SF.general
Facility type
: interferometer
Transitions
: OH_1665,OH_1667
Abstract
We report on Multi-Element Radio-Linked Interferometer Network (MERLIN) polarization measurements of OH 1665- and 1667-MHz masers in the star-forming region, AFGL 2591. The masers lie in an elliptical region of angular diameter 1.5 arcsec near the continuum source VLA 3, which has been proposed as the source powering the bipolar outflow in this region. The elliptical distribution of masers is orthogonal to the outflow, and is consistent with the OH masers tracing a molecular torus of radius ~750 au, inclined to the line of sight by 55°. The ring has a velocity gradient that is consistent with rotation about a central mass of 31 M
solar
. Zeeman splitting indicates a magnetic field ranging from -1.6 to +3.8 mG. The field reverses direction on opposite sides of the maser disc, indicating a toroidal component. Polarization of the OH masers in this source is relatively low, typically ~50 per cent at 1665 MHz. The linear polarization vectors are predominantly either perpendicular or parallel to the outflow direction. The data are interpreted in terms of a twisted magnetic field model.
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Detection table from Hutawarakorn & Cohen (2005)
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individual components
ID
Obs. RA
Obs. Dec
RA offset
Dec offset
l
b
Group id
grpv
#
Source name
Line
Frequency
V
peak
F
peak
Telescope
V
step
RMS
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
OH
(MHz)
(km/s)
(Jy/beam)
(km/s)
(mJy/beam)
(arcsec)
Yes
/
No
(kpc)
1
+20 29 24.922
+40 11 20.18
78.886964
0.708776
G78.887+0.709
G78.8867+0.7089
AFGL 2591
1665 MHz
;
1665
-11.31 .. -0.07
0.06 .. 1.91
MERLIN
0.21
15.000
0.135
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
SFR
1996 Jan 21-23
+20 29 24.9365
+40 11 19.9944
216 mas
-186 mas
78.886949
0.708708
1
AFGL 2591
1665
-11.31
0.25
+20 29 24.9268
+40 11 20.1204
71 mas
-60 mas
78.886959
0.708754
2
AFGL 2591
1665
-10.85
0.08
+20 29 24.9385
+40 11 20.0094
247 mas
-171 mas
78.886956
0.708705
3
AFGL 2591
1665
-10.73
0.19
+20 29 24.926
+40 11 20.0444
59 mas
-136 mas
78.886941
0.708743
4
AFGL 2591
1665
-10.44
0.07
+20 29 24.9349
+40 11 20.1034
192 mas
-77 mas
78.886971
0.708730
5
AFGL 2591
1665
-10.1
0.34
+20 29 24.9211
+40 11 20.1524
-14 mas
-28 mas
78.886956
0.708773
6
AFGL 2591
1665
-10.06
0.11
+20 29 24.9183
+40 11 20.0274
-57 mas
-153 mas
78.886923
0.708760
7
AFGL 2591
1665
-9.9
0.08
+20 29 24.9182
+40 11 20.0654
-58 mas
-115 mas
78.886931
0.708767
8
AFGL 2591
1665
-9.72
0.07
+20 29 24.9294
+40 11 20.1134
110 mas
-67 mas
78.886963
0.708746
9
AFGL 2591
1665
-9.42
0.19
+20 29 24.9413
+40 11 20.0224
288 mas
-158 mas
78.886964
0.708700
10
AFGL 2591
1665
-9.36
0.11
+20 29 24.9128
+40 11 20.0914
-139 mas
-89 mas
78.886927
0.708785
11
AFGL 2591
1665
-9.24
0.41
+20 29 24.8901
+40 11 19.6874
-479 mas
-493 mas
78.886794
0.708778
12
AFGL 2591
1665
-4.68
0.11
+20 29 24.887
+40 11 19.6964
-526 mas
-484 mas
78.886790
0.708787
13
AFGL 2591
1665
-3.72
0.97
+20 29 24.8908
+40 11 19.6924
-469 mas
-488 mas
78.886796
0.708777
14
AFGL 2591
1665
-2.92
1.91
+20 29 24.9048
+40 11 18.7424
-259 mas
-1438 mas
78.886608
0.708586
15
AFGL 2591
1665
-0.07
0.72
+20 29 24.9361
+40 11 19.9544
211 mas
-226 mas
78.886940
0.708702
16
AFGL 2591
1665
-11.16
0.07
+20 29 24.9346
+40 11 20.0014
188 mas
-179 mas
78.886947
0.708714
17
AFGL 2591
1665
-10.98
0.14
+20 29 24.9389
+40 11 19.9984
252 mas
-182 mas
78.886955
0.708703
18
AFGL 2591
1665
-10.41
0.54
+20 29 24.9325
+40 11 20.0944
157 mas
-86 mas
78.886964
0.708735
19
AFGL 2591
1665
-9.58
0.29
+20 29 24.9148
+40 11 20.1004
-109 mas
-80 mas
78.886933
0.708781
20
AFGL 2591
1665
-9.09
0.08
+20 29 24.9286
+40 11 20.1124
98 mas
-68 mas
78.886961
0.708748
21
AFGL 2591
1665
-9.05
0.08
+20 29 24.9414
+40 11 20.0634
290 mas
-117 mas
78.886974
0.708707
22
AFGL 2591
1665
-9
0.06
+20 29 24.9353
+40 11 20.0344
199 mas
-146 mas
78.886956
0.708718
23
AFGL 2591
1665
-8.82
0.08
+20 29 24.9128
+40 11 20.0844
-139 mas
-96 mas
78.886925
0.708784
24
AFGL 2591
1665
-8.64
0.09
+20 29 24.8913
+40 11 19.6944
-461 mas
-486 mas
78.886797
0.708776
25
AFGL 2591
1665
-4.68
0.09
+20 29 24.8877
+40 11 19.6984
-516 mas
-482 mas
78.886791
0.708786
26
AFGL 2591
1665
-3.7
0.39
+20 29 24.8911
+40 11 19.6904
-465 mas
-490 mas
78.886796
0.708776
27
AFGL 2591
1665
-2.88
0.97
+20 29 24.8875
+40 11 19.7014
-519 mas
-479 mas
78.886792
0.708787
28
AFGL 2591
1665
-1.45
0.2
+20 29 24.8918
+40 11 18.7794
-454 mas
-1401 mas
78.886592
0.708625
29
AFGL 2591
1665
-1.31
0.17
2
+20 29 24.922
+40 11 20.18
78.886964
0.708776
G78.887+0.709
G78.8867+0.7089
AFGL 2591
1667 MHz
;
1667
-13.3 .. -0.02
0.11 .. 3.49
MERLIN
0.21
15.000
0.135
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
SFR
1996 Jan 21-23
+20 29 24.94
+40 11 20.0294
269 mas
-151 mas
78.886964
0.708705
1
AFGL 2591
1667
-13.3
0.11
+20 29 24.9378
+40 11 19.9104
236 mas
-270 mas
78.886933
0.708691
2
AFGL 2591
1667
-12.72
0.19
+20 29 24.9363
+40 11 20.0444
214 mas
-136 mas
78.886960
0.708717
3
AFGL 2591
1667
-12.59
0.34
+20 29 24.9355
+40 11 19.9714
202 mas
-209 mas
78.886942
0.708707
4
AFGL 2591
1667
-11.89
0.42
+20 29 24.9315
+40 11 20.0844
142 mas
-96 mas
78.886960
0.708736
5
AFGL 2591
1667
-11.65
0.85
+20 29 24.9303
+40 11 20.1254
124 mas
-55 mas
78.886967
0.708745
6
AFGL 2591
1667
-11.19
0.76
+20 29 24.9383
+40 11 20.0594
244 mas
-121 mas
78.886967
0.708714
7
AFGL 2591
1667
-11.08
0.17
+20 29 24.9305
+40 11 20.0044
126 mas
-176 mas
78.886940
0.708725
8
AFGL 2591
1667
-10.88
0.14
+20 29 24.9345
+40 11 20.2004
186 mas
20 mas
78.886992
0.708747
9
AFGL 2591
1667
-10.53
0.3
+20 29 24.9299
+40 11 20.1384
117 mas
-42 mas
78.886969
0.708749
10
AFGL 2591
1667
-10.45
0.24
+20 29 24.9365
+40 11 20.1364
217 mas
-44 mas
78.886981
0.708731
11
AFGL 2591
1667
-10.37
0.45
+20 29 24.9443
+40 11 19.5364
334 mas
-644 mas
78.886861
0.708613
12
AFGL 2591
1667
-10.32
0.65
+20 29 24.9344
+40 11 20.1564
185 mas
-24 mas
78.886982
0.708740
13
AFGL 2591
1667
-10.1
0.46
+20 29 24.9269
+40 11 20.1784
72 mas
-2 mas
78.886973
0.708763
14
AFGL 2591
1667
-10
0.37
+20 29 24.9424
+40 11 19.4264
305 mas
-754 mas
78.886832
0.708600
15
AFGL 2591
1667
-9.73
0.14
+20 29 24.9303
+40 11 20.1364
124 mas
-44 mas
78.886970
0.708747
16
AFGL 2591
1667
-9.34
0.11
+20 29 24.9127
+40 11 20.1424
-140 mas
-38 mas
78.886938
0.708793
17
AFGL 2591
1667
-8.98
3.49
+20 29 24.9269
+40 11 20.0594
73 mas
-121 mas
78.886946
0.708743
18
AFGL 2591
1667
-7.3
0.11
+20 29 24.8914
+40 11 18.8764
-460 mas
-1304 mas
78.886613
0.708642
19
AFGL 2591
1667
-1.84
0.17
+20 29 24.893
+40 11 18.8494
-436 mas
-1331 mas
78.886610
0.708634
20
AFGL 2591
1667
-1.44
0.18
+20 29 24.8939
+40 11 18.8254
-423 mas
-1355 mas
78.886607
0.708628
21
AFGL 2591
1667
-0.78
0.23
+20 29 24.9055
+40 11 18.7574
-248 mas
-1423 mas
78.886613
0.708586
22
AFGL 2591
1667
-0.53
0.53
+20 29 24.8891
+40 11 19.0784
-494 mas
-1102 mas
78.886655
0.708681
23
AFGL 2591
1667
-0.02
0.13
+20 29 24.9431
+40 11 19.8584
316 mas
-322 mas
78.886931
0.708669
24
AFGL 2591
1667
-12.47
0.12
+20 29 24.9305
+40 11 20.0894
126 mas
-91 mas
78.886959
0.708739
25
AFGL 2591
1667
-11.25
0.27
+20 29 24.9387
+40 11 20.0294
250 mas
-151 mas
78.886961
0.708708
26
AFGL 2591
1667
-11.07
0.17
+20 29 24.9433
+40 11 19.5384
318 mas
-642 mas
78.886859
0.708616
27
AFGL 2591
1667
-10.5
0.66
+20 29 24.9393
+40 11 20.1074
258 mas
-73 mas
78.886980
0.708719
28
AFGL 2591
1667
-10.34
0.32
+20 29 24.9343
+40 11 20.0974
183 mas
-83 mas
78.886968
0.708731
29
AFGL 2591
1667
-9.96
0.47
+20 29 24.9125
+40 11 20.1384
-144 mas
-42 mas
78.886937
0.708793
30
AFGL 2591
1667
-8.9
1.24
+20 29 24.8921
+40 11 18.8134
-450 mas
-1367 mas
78.886601
0.708630
31
AFGL 2591
1667
-1.36
0.35
Get selected data
X
DSS colored
2MASS colored
WISE colored
PACS color (70-160 um)
SPIRE color (250-500 um)
GLIMPSE 360
SDSS color
IRAC color I1,I2,I4
NVSS (1.4GHz)
ATLASGAL 870 um
ATLASGAL 870 um + Planck
Bolocam 1.1 mm
select MAX(oh_data_all.ra_hms) as ra_hms,MAX(oh_data_all.dec_dms) as dec_dms,MAX(oh_data_all.source_name) as source_name,MAX(oh_data_all.ra) as ra,MAX(oh_data_all.dec) as dec,MAX(oh_data_all.l) as l,MAX(oh_data_all.b) as b,MAX(oh_data_all.grp) as grp,MAX(oh_data_all.grpv) as grpv,MAX(oh_data_all.other_name) as other_name,MAX(oh_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(oh_data_all.line) as line,MAX(oh_data_all.freq) as freq,MAX(oh_data_all.pol) as pol,MAX(oh_data_all.vrange) as vrange,MAX(oh_data_all.vpeak) as vpeak,MAX(oh_data_all.peak) as peak,MAX(oh_data_all.fwhm) as fwhm,MAX(oh_data_all.int) as int,MAX(oh_data_all.rms) as rms,MAX(oh_data_all.units) as units,MAX(oh_data_all.units_rms) as units_rms,MAX(oh_data_all.date_txt) as date_txt,MAX(oh_data_all.telescope_ref) as telescope_ref,MAX(oh_data_all.telescope_conf) as telescope_conf,MAX(oh_data_all.v_step) as v_step,MAX(oh_data_all.beam) as beam,MAX(oh_data_all.beam_maj) as beam_maj,MAX(oh_data_all.beam_min) as beam_min,MAX(oh_data_all.beam_pa) as beam_pa,MAX(oh_data_all.ref) as ref,MAX(oh_data_all.list_ref) as list_ref,MAX(oh_data_all.ascii) as ascii,MAX(oh_data_all.url) as url,MAX(oh_data_all.image) as image,MAX(oh_data_all.image2) as image2,MAX(oh_data_all.image3) as image3,MAX(oh_data_all.descr) as descr,MAX(oh_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(oh_data_all.dist) as dist,1 as dist_parallax,MAX(oh_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 oh_data_all LEFT JOIN all_objects_withmet ON oh_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 oh_data_all.line=transitions."Line" WHERE ref ilike 'HUT05' AND detected=true AND hide=false GROUP BY ref
select oh_data_all.ra_hms,oh_data_all.dec_dms,oh_data_all.source_name,oh_data_all.ra,oh_data_all.dec,oh_data_all.l,oh_data_all.b,oh_data_all.grp,oh_data_all.grpv,oh_data_all.other_name,oh_data_all.other_desc,oh_data_all.thermal,oh_data_all.line,oh_data_all.freq,oh_data_all.pol,oh_data_all.vrange,oh_data_all.vpeak,oh_data_all.peak,oh_data_all.fwhm,oh_data_all.int,oh_data_all.rms,oh_data_all.units,oh_data_all.units_rms,oh_data_all.date_txt,oh_data_all.telescope_ref,oh_data_all.telescope_conf,oh_data_all.v_step,oh_data_all.beam,oh_data_all.beam_maj,oh_data_all.beam_min,oh_data_all.beam_pa,oh_data_all.ref,oh_data_all.list_ref,oh_data_all.ascii,oh_data_all.url,oh_data_all.image,oh_data_all.image2,oh_data_all.image3,oh_data_all.descr,oh_data_all.id,oh_data_all.mjy_flag,oh_data_all.rms_mjy_flag,oh_data_all.dist,oh_data_all.dist_parallax,oh_data_all.date_txt,line_det,type,simbad_types_cat FROM oh_data_all LEFT JOIN all_objects_withmet ON oh_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 oh_data_all.line=transitions."Line" WHERE ref ilike 'HUT05' AND detected=true AND hide=false ORDER BY detected DESC,id
