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H
2
O
ASA10 - Distance and Proper Motion Measurement of the Red Supergiant, S Persei, with VLBI H
2
O Maser Astrometry
Interferometry data
Short title
: Asaki et al. (2010)
Authors
: Asaki, Y.Deguchi, S.Imai, H.Hachisuka, K.Miyoshi, M.Honma, M.
Journal
: The Astrophysical Journal, Volume 721, Issue 1, pp. 267-277 (2010).
Bibcode
:
2010ApJ...721..267A
PDF
:
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Target type
: High_mass_SFR
Observations category
: parallax
Facility type
: interferometer
Abstract
We have conducted Very Long Baseline Array phase-referencing monitoring of H2O masers around the red supergiant, S Persei, for six years. We have fitted maser motions to a simple expanding-shell model with a common annual parallax and stellar proper motion, and obtained the annual parallax as 0.413 ± 0.017 mas and the stellar proper motion as (-0.49 ± 0.23 mas yr-1, -1.19 ± 0.20 mas yr-1) in right ascension and declination, respectively. The obtained annual parallax corresponds to the trigonometric distance of 2.42+0.11 -0.09 kpc. Assuming a Galactocentric distance of the Sun of 8.5 kpc, the circular rotational velocity of the local standard of rest at a distance of the Sun of 220 km s-1, and a flat Galactic rotation curve, S Persei is suggested to have a non-circular motion deviating from the Galactic circular rotation for 15 km s-1, which is mainly dominated by the anti-rotation direction component of 12.9 ± 2.9 km s-1. This red supergiant is thought to belong to the OB association, Per OB1, so that this non-circular motion is representative of a motion of the OB association in the Milky Way. This non-circular motion is somewhat larger than that explained by the standard density-wave theory for a spiral galaxy and is attributed to either a cluster shuffling of the OB association, or to non-linear interactions between non-stationary spiral arms and multi-phase interstellar media. The latter comes from a new view of a spiral arm formation in the Milky Way suggested by recent large N-body/smoothed particle hydrodynamics numerical simulations.
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Detection table from Asaki et al. (2010)
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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
π
Telescope
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
H
2
O
(km/s)
(mas/yr)
(mas/yr)
(mas)
Yes
/
No
(kpc)
1
+02 22 51.711
+58 35 11.422
134.6206824
-2.1950001
G134.621-2.195
S Per
Image
Descr
22 GHz
;
VLBA
+H
2
O
+OH
+SiO
UNK
2.42 (+0.11-0.09)
2000 Nov - 2007 Feb
+02 22 51.7091433
+58 35 11.42207
-27.85 mas
0.11 mas
134.620679
-2.195001
1
S Per
-33.58
-0.95 (0.04)
-1.40 (0.01)
0.417 (0.047)
+02 22 51.7091427
+58 35 11.42222
-27.86 mas
0.26 mas
134.620679
-2.195001
2
S Per
-33.79
-0.93 (0.03)
-1.43 (0.01)
0.398 (0.041)
+02 22 51.7091427
+58 35 11.42224
-27.86 mas
0.28 mas
134.620679
-2.195001
3
S Per
-34
-0.93 (0.03)
-1.44 (0.01)
0.398 (0.040)
+02 22 51.7091407
+58 35 11.42223
-27.89 mas
0.27 mas
134.620679
-2.195001
4
S Per
-34.21
-0.92 (0.03)
-1.42 (0.01)
0.425 (0.042)
+02 22 51.7091347
+58 35 11.42244
-27.98 mas
0.48 mas
134.620679
-2.195001
5
S Per
-34.42
-0.89 (0.04)
-1.50 (0.01)
0.410 (0.051)
+02 22 51.709846
+58 35 11.4148
-17.31 mas
-7.16 mas
134.620681
-2.195003
6
S Per
-45.59
-1.35 (0.05)
-1.43 (0.01)
0.403 (0.046)
+02 22 51.7078787
+58 35 11.39414
-46.82 mas
-27.82 mas
134.620679
-2.195010
7
S Per
-29.57
-1.23 (0.03)
-1.66 (0.01)
0.412 (0.039)
+02 22 51.707954
+58 35 11.39515
-45.69 mas
-26.81 mas
134.620679
-2.195009
8
S Per
-29.57
-1.37 (0.04)
-1.73 (0.01)
0.454 (0.039)
+02 22 51.707878
+58 35 11.39417
-46.83 mas
-27.79 mas
134.620679
-2.195010
9
S Per
-29.78
-1.21 (0.03)
-1.66 (0.01)
0.429 (0.040)
+02 22 51.707944
+58 35 11.3951
-45.84 mas
-26.86 mas
134.620679
-2.195009
10
S Per
-29.78
-1.32 (0.03)
-1.71 (0.01)
0.470 (0.038)
+02 22 51.7079693
+58 35 11.39544
-45.46 mas
-26.52 mas
134.620679
-2.195009
11
S Per
-30.21
-1.37 (0.03)
-1.79 (0.01)
0.352 (0.043)
+02 22 51.7100287
+58 35 11.41407
-14.57 mas
-7.89 mas
134.620681
-2.195003
12
S Per
-47.06
-0.81 (0.05)
-1.76 (0.01)
0.475 (0.052)
+02 22 51.7100987
+58 35 11.41343
-13.52 mas
-8.53 mas
134.620681
-2.195003
13
S Per
-47.69
-1.21 (0.04)
-1.50 (0.01)
0.431 (0.041)
+02 22 51.7101173
+58 35 11.41359
-13.24 mas
-8.37 mas
134.620681
-2.195003
14
S Per
-48.12
-1.30 (0.04)
-1.54 (0.01)
0.411 (0.042)
+02 22 51.7101947
+58 35 11.41318
-12.08 mas
-8.78 mas
134.620682
-2.195003
15
S Per
-48.12
-0.88 (0.04)
-1.72 (0.01)
0.372 (0.039)
+02 22 51.7101147
+58 35 11.41359
-13.28 mas
-8.37 mas
134.620681
-2.195003
16
S Per
-48.33
-1.29 (0.04)
-1.54 (0.01)
0.412 (0.043)
+02 22 51.7102427
+58 35 11.41196
-11.36 mas
-10 mas
134.620682
-2.195003
17
S Per
-48.33
-0.90 (0.04)
-1.54 (0.01)
0.449 (0.042)
+02 22 51.7104767
+58 35 11.41284
-7.85 mas
-9.12 mas
134.620682
-2.195003
18
S Per
-49.38
-1.26 (0.04)
-1.72 (0.01)
0.404 (0.043)
+02 22 51.7104793
+58 35 11.41301
-7.81 mas
-8.95 mas
134.620682
-2.195003
19
S Per
-49.59
-1.27 (0.04)
-1.77 (0.01)
0.386 (0.043)
+02 22 51.7137953
+58 35 11.39582
41.93 mas
-26.14 mas
134.620691
-2.195005
20
S Per
-39.9
0.28 (0.03)
-1.57 (0.01)
0.384 (0.051)
+02 22 51.7137953
+58 35 11.39581
41.93 mas
-26.15 mas
134.620691
-2.195005
21
S Per
-40.11
0.27 (0.03)
-1.56 (0.01)
0.403 (0.043)
+02 22 51.713792
+58 35 11.39581
41.88 mas
-26.15 mas
134.620691
-2.195005
22
S Per
-40.32
0.27 (0.03)
-1.54 (0.01)
0.425 (0.042)
+02 22 51.7137887
+58 35 11.39581
41.83 mas
-26.15 mas
134.620691
-2.195005
23
S Per
-40.53
0.28 (0.03)
-1.56 (0.01)
0.401 (0.045)
+02 22 51.7123687
+58 35 11.37802
20.53 mas
-43.94 mas
134.620689
-2.195011
24
S Per
-43.48
-0.15 (0.03)
-1.91 (0.01)
0.472 (0.047)
+02 22 51.7123527
+58 35 11.37788
20.29 mas
-44.08 mas
134.620689
-2.195011
25
S Per
-43.69
-0.08 (0.03)
-1.91 (0.01)
0.332 (0.042)
+02 22 51.712336
+58 35 11.37749
20.04 mas
-44.47 mas
134.620689
-2.195011
26
S Per
-43.9
-0.03 (0.03)
-1.82 (0.01)
0.405 (0.041)
+02 22 51.7123413
+58 35 11.37729
20.12 mas
-44.67 mas
134.620689
-2.195011
27
S Per
-44.11
-0.07 (0.04)
-1.77 (0.01)
0.425 (0.041)
+02 22 51.712352
+58 35 11.37718
20.28 mas
-44.78 mas
134.620689
-2.195011
28
S Per
-44.32
-0.13 (0.04)
-1.75 (0.01)
0.419 (0.042)
+02 22 51.7123513
+58 35 11.37721
20.27 mas
-44.75 mas
134.620689
-2.195011
29
S Per
-44.53
-0.13 (0.04)
-1.78 (0.01)
0.426 (0.041)
+02 22 51.7122807
+58 35 11.37787
19.21 mas
-44.09 mas
134.620689
-2.195011
30
S Per
-44.74
-0.05 (0.03)
-1.72 (0.01)
0.425 (0.040)
+02 22 51.7123507
+58 35 11.37715
20.26 mas
-44.81 mas
134.620689
-2.195011
31
S Per
-44.74
-0.14 (0.04)
-1.78 (0.01)
0.418 (0.044)
+02 22 51.7122733
+58 35 11.37806
19.1 mas
-43.9 mas
134.620689
-2.195011
32
S Per
-44.96
-0.04 (0.03)
-1.78 (0.01)
0.417 (0.039)
+02 22 51.71227
+58 35 11.37799
19.05 mas
-43.97 mas
134.620689
-2.195011
33
S Per
-45.17
-0.03 (0.03)
-1.75 (0.01)
0.408 (0.039)
+02 22 51.7122687
+58 35 11.3779
19.03 mas
-44.06 mas
134.620689
-2.195011
34
S Per
-45.38
-0.03 (0.03)
-1.73 (0.01)
0.419 (0.039)
+02 22 51.7122687
+58 35 11.37782
19.03 mas
-44.14 mas
134.620689
-2.195011
35
S Per
-45.59
-0.04 (0.03)
-1.72 (0.01)
0.430 (0.039)
+02 22 51.7122707
+58 35 11.37774
19.06 mas
-44.22 mas
134.620689
-2.195011
36
S Per
-45.8
-0.06 (0.03)
-1.73 (0.01)
0.433 (0.041)
+02 22 51.712274
+58 35 11.37764
19.11 mas
-44.32 mas
134.620689
-2.195011
37
S Per
-46.01
-0.09 (0.03)
-1.74 (0.01)
0.454 (0.050)
+02 22 51.7128953
+58 35 11.37232
28.43 mas
-49.64 mas
134.620691
-2.195012
38
S Per
-41.79
0.02 (0.03)
-1.93 (0.01)
0.430 (0.037)
+02 22 51.712898
+58 35 11.37217
28.47 mas
-49.79 mas
134.620691
-2.195012
39
S Per
-42.01
-0.00 (0.03)
-1.89 (0.01)
0.430 (0.037)
+02 22 51.7128973
+58 35 11.37216
28.46 mas
-49.8 mas
134.620691
-2.195012
40
S Per
-42.22
-0.01 (0.03)
-1.89 (0.01)
0.422 (0.037)
+02 22 51.7128987
+58 35 11.37213
28.48 mas
-49.83 mas
134.620691
-2.195012
41
S Per
-42.43
-0.04 (0.03)
-1.87 (0.01)
0.428 (0.037)
+02 22 51.710344
+58 35 11.42577
-9.84 mas
3.81 mas
134.620681
-2.195000
42
S Per
-47.91
-0.67 (0.05)
-1.03 (0.01)
0.404 (0.041)
+02 22 51.7103473
+58 35 11.42587
-9.79 mas
3.91 mas
134.620681
-2.195000
43
S Per
-48.12
-0.68 (0.03)
-1.06 (0.01)
0.378 (0.039)
+02 22 51.7103467
+58 35 11.42594
-9.8 mas
3.98 mas
134.620681
-2.195000
44
S Per
-48.33
-0.67 (0.03)
-1.07 (0.01)
0.351 (0.039)
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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 'ASA10' 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 'ASA10' AND detected=true AND hide=false ORDER BY detected DESC,id
