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H
2
O
CHO10B - The Evolutionary Stage of H II Region and Spectral Types of Massive Stars from Kinematics of H_{2}O Masers in W51 Main
Interferometry data
Short title
: Cho et al. (2010b)
Authors
: Cho, J.,Kan-Ya, Y.Byun, Y. -I.Kurayama, T.Choi, Y. K.Kim, M. K.
Journal
: Journal of the Korean Astronomical Society, vol. 43, no. 2, pp. 41-54
Bibcode
:
2010JKAS...43...41C
Target type
: High_mass_SFR,star
Abstract
We report relative proper motion measurements of H2O masers in massive star-forming region W51 Main, based on data sets of VLBI observations for H2O masers at 22 GHz with Japanese VERA telescopes from 2003 to 2006. Data reductions and single-beam imaging analysis are to measure internal kinematics of maser spots and eventually to estimate the three-dimensional kinematics of H2O masers in W51 Main. Average space motions and proper motion measurements of H2O masers are given both graphical and in table formats. We find in this study that W51 Main appears to be associated with hyper-compact H II region with multiple massive proto-stars whose spectral types are of late O.
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Detection table from Cho et al. (2010b)
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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
μ
X
μ
Y
Telescope
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
H
2
O
(km/s)
(mas/yr)
(mas/yr)
(arcsec)
Yes
/
No
(kpc)
1
+19 23 43.8
+14 30 36
49.489911
-0.3869021
G49.489-0.387
W51 Main
Image
Descr
22 GHz
;
65.4
VERA
0.0012
+H
2
O
+CH
3
OH I
+CH
3
OH II
+OH
-SiO
SFR
2003-2006
+19 23 43.7995579
+14 30 35.987562
-6.631 mas
-12.438 mas
49.489907
-0.386902
1
W51 Main
100.10
-1.317
+19 23 43.7999764
+14 30 35.98208
-0.354 mas
-17.92 mas
49.489907
-0.386904
2
W51 Main
97.87
0.034
0.618
+19 23 43.7999987
+14 30 35.984449
-0.0199999 mas
-15.551 mas
49.489907
-0.386904
3
W51 Main
95.10
-0.763
2.577
+19 23 43.8004417
+14 30 35.99063
6.626 mas
-9.37 mas
49.489910
-0.386905
4
W51 Main
95.31
-0.708
2.196
+19 23 43.7984091
+14 30 35.9963
-23.864 mas
-3.7 mas
49.489907
-0.386897
5
W51 Main
89.00
1.548
1.918
+19 23 43.7960477
+14 30 35.921787
-59.285 mas
-78.213 mas
49.489884
-0.386898
6
W51 Main
52.72
4.221
-1.206
+19 23 43.7961437
+14 30 35.923804
-57.845 mas
-76.196 mas
49.489885
-0.386898
7
W51 Main
47.61
-0.626
-2.062
+19 23 43.7995353
+14 30 35.951586
-6.97 mas
-48.414 mas
49.489898
-0.386907
8
W51 Main
122.65
-1.976
-3.222
+19 23 43.796701
+14 30 36.009142
-49.485 mas
9.142 mas
49.489907
-0.386889
9
W51 Main
117.17
1.796
-1.331
+19 23 43.7973429
+14 30 35.991389
-39.857 mas
-8.611 mas
49.489904
-0.386894
10
W51 Main
116.81
1.176
-3.127
+19 23 43.7966371
+14 30 36.007574
-50.444 mas
7.574 mas
49.489906
-0.386889
11
W51 Main
111.60
11.147
3.790
+19 23 43.7967137
+14 30 36.008087
-49.294 mas
8.087 mas
49.489907
-0.386889
12
W51 Main
111.09
3.056
1.546
+19 23 43.7998791
+14 30 35.995672
-1.814 mas
-4.328 mas
49.489910
-0.386902
13
W51 Main
105.46
-4.864
3.207
+19 23 43.7996737
+14 30 35.995042
-4.895 mas
-4.958 mas
49.489909
-0.386902
14
W51 Main
99.26
-0.983
-1.285
+19 23 43.7984829
+14 30 35.995968
-22.757 mas
-4.032 mas
49.489907
-0.386897
15
W51 Main
83.98
-0.125
-1.053
+19 23 43.7965011
+14 30 35.92948
-52.484 mas
-70.52 mas
49.489887
-0.386899
16
W51 Main
82.61
0.118
-1.186
+19 23 43.798511
+14 30 36.088147
-22.335 mas
88.147 mas
49.489930
-0.386885
17
W51 Main
73.23
-3.297
-0.045
+19 23 43.7964298
+14 30 36.012405
-53.553 mas
12.405 mas
49.489907
-0.386888
18
W51 Main
83.21
0.017
2.849
+19 23 43.7983597
+14 30 36.074067
-24.605 mas
74.067 mas
49.489926
-0.386887
19
W51 Main
65.86
1.249
2.636
+19 23 43.7952577
+14 30 36.002067
-71.135 mas
2.067 mas
49.489903
-0.386885
20
W51 Main
55.46
0.912
-3.920
+19 23 43.8009137
+14 30 35.967362
13.706 mas
-32.638 mas
49.489905
-0.386910
21
W51 Main
124.45
0.022
2.466
+19 23 43.7997937
+14 30 35.995152
-3.094 mas
-4.848 mas
49.489909
-0.386902
22
W51 Main
105.59
-1.396
0.059
+19 23 43.7998257
+14 30 35.995532
-2.614 mas
-4.468 mas
49.489910
-0.386902
23
W51 Main
104.96
3.892
-4.073
+19 23 43.7963464
+14 30 36.011282
-54.804 mas
11.282 mas
49.489907
-0.386888
24
W51 Main
82.00
1.032
-2.568
+19 23 43.7948431
+14 30 35.883402
-77.354 mas
-116.598 mas
49.489873
-0.386899
25
W51 Main
63.51
2.460
4.269
+19 23 43.7954341
+14 30 35.989609
-68.488 mas
-10.391 mas
49.489900
-0.386887
26
W51 Main
77.69
-1.038
3.505
+19 23 43.7985141
+14 30 36.04787
-22.289 mas
47.87 mas
49.489920
-0.386891
27
W51 Main
74.28
0.140
-1.699
+19 23 43.7974916
+14 30 36.030968
-37.626 mas
30.968 mas
49.489914
-0.386889
28
W51 Main
71.33
0.808
-0.400
+19 23 43.7982317
+14 30 36.06843
-26.524 mas
68.43 mas
49.489924
-0.386887
29
W51 Main
69.53
-0.151
0.980
+19 23 43.7980617
+14 30 36.07017
-29.074 mas
70.17 mas
49.489925
-0.386886
30
W51 Main
67.43
-0.090
0.127
+19 23 43.7982671
+14 30 36.072876
-25.994 mas
72.876 mas
49.489926
-0.386886
31
W51 Main
66.21
-0.321
-0.109
+19 23 43.7983597
+14 30 36.075682
-24.605 mas
75.682 mas
49.489926
-0.386886
32
W51 Main
67.19
0.920
0.061
+19 23 43.7979884
+14 30 36.07739
-30.174 mas
77.39 mas
49.489926
-0.386885
33
W51 Main
60.22
-0.454
0.673
+19 23 43.7967617
+14 30 36.059641
-48.575 mas
59.641 mas
49.489919
-0.386883
34
W51 Main
57.39
-0.584
-0.480
+19 23 43.7955771
+14 30 36.00854
-66.344 mas
8.54 mas
49.489905
-0.386885
35
W51 Main
55.91
-0.530
-0.508
+19 23 43.7953791
+14 30 36.005109
-69.313 mas
5.109 mas
49.489903
-0.386885
36
W51 Main
55.70
1.559
-0.945
+19 23 43.7969764
+14 30 36.06641
-45.354 mas
66.41 mas
49.489922
-0.386883
37
W51 Main
55.56
-0.689
0.709
+19 23 43.7952933
+14 30 36.00263
-70.6 mas
2.63 mas
49.489903
-0.386885
38
W51 Main
55.68
-0.851
-1.096
+19 23 43.7988125
+14 30 36.050873
-17.812 mas
50.873 mas
49.489921
-0.386891
39
W51 Main
73.29
0.831
-1.206
+19 23 43.7985757
+14 30 36.091133
-21.365 mas
91.133 mas
49.489931
-0.386885
40
W51 Main
68.38
-0.334
-2.144
+19 23 43.7984223
+14 30 36.086573
-23.665 mas
86.573 mas
49.489929
-0.386885
41
W51 Main
73.86
1.764
0.798
+19 23 43.7983929
+14 30 36.088085
-24.106 mas
88.085 mas
49.489930
-0.386885
42
W51 Main
67.89
-0.349
0.965
+19 23 43.7985718
+14 30 36.090698
-21.423 mas
90.698 mas
49.489931
-0.386885
43
W51 Main
68.95
-0.315
-0.327
+19 23 43.7958437
+14 30 36.012233
-62.345 mas
12.233 mas
49.489906
-0.386886
44
W51 Main
56.91
-0.039
1.625
+19 23 43.796235
+14 30 35.924948
-56.475 mas
-75.052 mas
49.489885
-0.386899
45
W51 Main
51.48
-1.228
0.676
+19 23 43.797061
+14 30 35.941648
-44.085 mas
-58.352 mas
49.489891
-0.386899
46
W51 Main
111.06
-2.641
-1.238
+19 23 43.7963724
+14 30 35.964441
-54.414 mas
-35.559 mas
49.489895
-0.386894
47
W51 Main
97.33
0.022
2.443
+19 23 43.7978034
+14 30 36.014238
-32.949 mas
14.238 mas
49.489910
-0.386892
48
W51 Main
96.68
1.432
0.062
+19 23 43.7985223
+14 30 35.995367
-22.165 mas
-4.633 mas
49.489907
-0.386897
49
W51 Main
88.53
-2.565
0.817
+19 23 43.7987857
+14 30 36.048517
-18.215 mas
48.517 mas
49.489921
-0.386891
50
W51 Main
79.83
0.931
-2.272
+19 23 43.7985372
+14 30 36.08944
-21.942 mas
89.44 mas
49.489930
-0.386885
51
W51 Main
71.73
-1.086
5.002
+19 23 43.7980457
+14 30 36.074483
-29.314 mas
74.483 mas
49.489926
-0.386885
52
W51 Main
60.07
-0.508
1.388
+19 23 43.7979797
+14 30 36.073037
-30.305 mas
73.037 mas
49.489925
-0.386885
53
W51 Main
57.84
-0.772
0.993
+19 23 43.7962697
+14 30 36.041747
-55.955 mas
41.747 mas
49.489914
-0.386883
54
W51 Main
56.60
-0.679
2.153
+19 23 43.7943343
+14 30 35.972857
-84.985 mas
-27.143 mas
49.489894
-0.386886
55
W51 Main
55.88
-1.264
3.222
+19 23 43.7961043
+14 30 35.922087
-58.435 mas
-77.913 mas
49.489885
-0.386898
56
W51 Main
50.05
-0.441
2.147
+19 23 43.7994443
+14 30 35.989427
-8.335 mas
-10.573 mas
49.489907
-0.386901
57
W51 Main
113.76
-2.430
1.688
+19 23 43.7999517
+14 30 35.996377
-0.725 mas
-3.623 mas
49.489910
-0.386902
58
W51 Main
107.35
1.185
2.693
+19 23 43.8001317
+14 30 35.996337
1.975 mas
-3.663 mas
49.489910
-0.386903
59
W51 Main
107.74
-0.940
0.171
+19 23 43.8009003
+14 30 36.005317
13.505 mas
5.317 mas
49.489914
-0.386905
60
W51 Main
98.05
-0.789
1.071
+19 23 43.7994363
+14 30 35.988297
-8.455 mas
-11.703 mas
49.489907
-0.386902
61
W51 Main
106.31
-5.034
0.991
+19 23 43.8057281
+14 30 35.939556
85.921 mas
-60.444 mas
49.489907
-0.386930
62
W51 Main
82.58
-0.092
2.881
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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 'CHO10B' 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 'CHO10B' AND detected=true AND hide=false ORDER BY detected DESC,id
