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H
2
O
MOE09 - A Precise Distance to IRAS 00420+5530 via H
2
O Maser Parallax with the VLBA
Interferometry data
Short title
: Moellenbrock et al. (2009)
Authors
: Moellenbrock, G. A.Claussen, M. J.Goss, W. M.
Journal
: The Astrophysical Journal, Volume 694, Issue 1, pp. 192-204 (2009).
Bibcode
:
2009ApJ...694..192M
Target type
: High_mass_SFR
Abstract
We have used the Very Long Baseline Array to measure the annual parallax of the H
2
O masers in the star-forming region IRAS 00420+5530. This measurement yields a direct distance estimate of 2.17 ± 0.05 kpc (an error of less than 3%), which disagrees substantially with the standard kinematic distance estimate of ~4.6 kpc (according to the rotation curve of Brand & Blitz), as well as most of the broad range of distances (1.7-7.7 kpc) used in various astrophysical analyses in the literature. The three-dimensional space velocity of IRAS 00420+5530 at this new, more accurate distance implies a substantial noncircular and anomalously slow Galactic orbit, consistent with similar observations of W3(OH) (Xu et al. and Hachisuka et al.), as well as line-of-sight velocity residuals in the rotation curve analysis of Brand & Blitz. The Perseus spiral arm of the Galaxy is thus more than a factor of 2 closer than previously presumed, and exhibits motions substantially at odds with axisymmetric models of the rotating Galaxy.
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Detection table from Moellenbrock et al. (2009)
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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
F
peak
Telescope
V
step
Beam
Detection
Class
Dist. (parallax)
Date
(J2000)
(J2000)
(mas)
(mas)
(deg.)
(deg.)
H
2
O
(km/s)
(mas/yr)
(mas/yr)
(mas)
(Jy)
(km/s)
(arcsec)
Yes
/
No
(kpc)
1
+00 44 58.397
+55 46 47.6
122.0161305
-7.0803644
G122.014-7.072
00420+5530
Image
Descr
22 GHz
;
-44.0
70
VLBA
0.253
0.001 x 0.00046
+H
2
O
+CH
3
OH I
-CH
3
OH II
SFR
2.17 (0.05)
2005 Nov - 2006 Sep
+00 44 58.3969941
+55 46 47.600085
0.032 mas
0.045 mas
122.016130
-7.080364
1
00420+5530
-43.4
-2.06 (0.08)
-1.88(0.05)
0.44 (0.02)
+00 44 58.3969939
+55 46 47.600078
0.029 mas
0.038 mas
122.016130
-7.080364
2
00420+5530
-43.6
-2.10(0.07)
-1.95 (0.05)
0.44 (0.02)
+00 44 58.3969941
+55 46 47.600069
0.031 mas
0.029 mas
122.016130
-7.080364
3
00420+5530
-43.9
-1.94 (0.06)
-1.72 (0.04)
0.44 (0.02)
+00 44 58.3969935
+55 46 47.600083
0.023 mas
0.043 mas
122.016130
-7.080364
4
00420+5530
-44.1
-2.05 (0.07)
-1.63 (0.05)
0.48 (0.02)
+00 44 58.3969939
+55 46 47.600096
0.028 mas
0.056 mas
122.016130
-7.080364
5
00420+5530
-44.3
-2.09 (0.09)
-1.65 (0.07)
0.49 (0.03)
+00 44 58.3969933
+55 46 47.60007
0.019 mas
0.03 mas
122.016130
-7.080364
6
00420+5530
-45.8
-2.55 (0.05)
-0.89 (0.04)
0.48 (0.01)
+00 44 58.3969933
+55 46 47.600071
0.019 mas
0.031 mas
122.016130
-7.080364
7
00420+5530
-46
-2.52 (0.05)
-0.84 (0.04)
0.45 (0.01)
+00 44 58.3969932
+55 46 47.600072
0.018 mas
0.032 mas
122.016130
-7.080364
8
00420+5530
-46.2
-2.52 (0.05)
-0.89 (0.04)
0.45 (0.01)
+00 44 58.3969937
+55 46 47.600059
0.026 mas
0.019 mas
122.016130
-7.080364
9
00420+5530
-46.6
-2.67 (0.13)
-1.92 (0.25)
0.50 (0.06)
+00 44 58.3969937
+55 46 47.60006
0.025 mas
0.02 mas
122.016130
-7.080364
10
00420+5530
-46.8
-2.66 (0.13)
-1.97 (0.25)
0.49 (0.06)
+00 44 58.3969935
+55 46 47.600051
0.023 mas
0.011 mas
122.016130
-7.080364
11
00420+5530
-47.2
-2.62 (0.10)
-1.93 (0.20)
0.50 (0.05)
+00 44 58.3969932
+55 46 47.600067
0.018 mas
0.027 mas
122.016130
-7.080364
12
00420+5530
-47.4
-2.34 (0.08)
-1.85 (0.08)
0.43 (0.02)
+00 44 58.3969935
+55 46 47.600063
0.022 mas
0.023 mas
122.016130
-7.080364
13
00420+5530
-47.6
-2.40 (0.08)
-1.88(0.08)
0.44 (0.02)
+00 44 58.3969941
+55 46 47.600059
0.032 mas
0.019 mas
122.016130
-7.080364
14
00420+5530
-43.2
-2.65 (0.09)
-1.05 (0.06)
0.50 (0.02)
+00 44 58.3969947
+55 46 47.60007
0.04 mas
0.03 mas
122.016130
-7.080364
15
00420+5530
-43.4
-2.48 (0.13)
-1.18(0.08)
0.47 (0.03)
+00 44 58.3969937
+55 46 47.600068
0.025 mas
0.028 mas
122.016130
-7.080364
16
00420+5530
-43.9
-5.79 (0.17)
-0.53(0.19)
0.62 (0.05)
+00 44 58.3969933
+55 46 47.600058
0.02 mas
0.018 mas
122.016130
-7.080364
17
00420+5530
-44.1
-5.33 (0.12)
-0.77 (0.14)
0.51 (0.04)
+00 44 58.396993
+55 46 47.600059
0.015 mas
0.019 mas
122.016130
-7.080364
18
00420+5530
-44.3
-5.29 (0.12)
-0.77 (0.13)
0.51 (0.04)
+00 44 58.3969934
+55 46 47.600057
0.021 mas
0.017 mas
122.016130
-7.080364
19
00420+5530
-44.5
-5.29 (0.14)
-0.81 (0.14)
0.50 (0.04)
+00 44 58.3969961
+55 46 47.600088
0.061 mas
0.048 mas
122.016130
-7.080364
20
00420+5530
-47.4
-5.51 (0.31)
-1.23 (0.34)
0.59 (0.10)
+00 44 58.3969962
+55 46 47.600076
0.063 mas
0.036 mas
122.016130
-7.080364
21
00420+5530
-47.6
-5.71 (0.28)
-1.18 (0.33)
0.56 (0.09)
+00 44 58.3969962
+55 46 47.600068
0.063 mas
0.028 mas
122.016130
-7.080364
22
00420+5530
-47.9
-5.65 (0.27)
-1.39 (0.32)
0.48 (0.09)
+00 44 58.3969956
+55 46 47.600063
0.054 mas
0.023 mas
122.016130
-7.080364
23
00420+5530
-48.1
-5.57 (0.24)
-1.60(0.28)
0.41 (0.08)
+00 44 58.3969943
+55 46 47.60007
0.035 mas
0.03 mas
122.016130
-7.080364
24
00420+5530
-49.3
-5.01 (0.16)
-1.15 (0.13)
0.43 (0.04)
+00 44 58.3969941
+55 46 47.600081
0.032 mas
0.041 mas
122.016130
-7.080364
25
00420+5530
-49.5
-4.99 (0.13)
-1.21 (0.09)
0.43 (0.03)
+00 44 58.3969944
+55 46 47.600066
0.036 mas
0.026 mas
122.016130
-7.080364
26
00420+5530
-49.8
-5.17 (0.11)
-1.24 (0.08)
0.48 (0.03)
+00 44 58.3969933
+55 46 47.60006
0.02 mas
0.02 mas
122.016130
-7.080364
27
00420+5530
-50
-5.14(0.10)
-1.42 (0.09)
0.48 (0.03)
+00 44 58.3969941
+55 46 47.600096
0.032 mas
0.056 mas
122.016130
-7.080364
28
00420+5530
-44.5
-1.21 (0.16)
-2.48 (0.11)
0.46 (0.04)
+00 44 58.3969943
+55 46 47.600087
0.034 mas
0.047 mas
122.016130
-7.080364
29
00420+5530
-44.7
-1.53 (0.14)
-2.42 (0.09)
0.52 (0.04)
+00 44 58.3969944
+55 46 47.600097
0.036 mas
0.057 mas
122.016130
-7.080364
30
00420+5530
-44.9
-1.79 (0.17)
-2.83(0.10)
0.61 (0.04)
+00 44 58.3969959
+55 46 47.60014
0.058 mas
0.1 mas
122.016130
-7.080364
31
00420+5530
-45.1
-1.22 (0.28)
-3.50(0.16)
0.48 (0.07)
+00 44 58.3969998
+55 46 47.60016
0.117 mas
0.12 mas
122.016130
-7.080364
32
00420+5530
-45.3
-0.72 (0.41)
-3.73 (0.24)
0.35 (0.10)
+00 44 58.3970016
+55 46 47.600279
0.144 mas
0.239 mas
122.016131
-7.080364
33
00420+5530
-45.5
-0.92 (0.59)
-2.83 (0.36)
0.25 (0.15)
+00 44 58.3970027
+55 46 47.600941
0.161 mas
0.901 mas
122.016131
-7.080364
34
00420+5530
-44.7
-4.40 (2.10)
-11.01 (1.11)
0.83 (0.51)
+00 44 58.3970087
+55 46 47.600819
0.251 mas
0.779 mas
122.016131
-7.080364
35
00420+5530
-44.9
-5.34(1.70)
-10.22 (0.93)
1.11 (0.44)
+00 44 58.3970061
+55 46 47.600837
0.211 mas
0.797 mas
122.016131
-7.080364
36
00420+5530
-45.1
-4.61 (1.71)
-10.27 (0.99)
0.90 (0.45)
+00 44 58.3970053
+55 46 47.600836
0.199 mas
0.796 mas
122.016131
-7.080364
37
00420+5530
-45.3
-4.28 (1.56)
-10.18(0.95)
0.82 (0.42)
+00 44 58.3970525
+55 46 47.600929
0.908 mas
0.889 mas
122.016131
-7.080364
38
00420+5530
-43.2
-13.68 (5.07)
0.25 (5.43)
0.16(1.60)
+00 44 58.3970791
+55 46 47.601267
1.307 mas
1.227 mas
122.016131
-7.080364
39
00420+5530
-43.4
2.45 (6.92)
-14.79 (8.06)
-2.89 (2.30)
+00 44 58.3970561
+55 46 47.601054
0.961 mas
1.014 mas
122.016131
-7.080364
40
00420+5530
-43.6
-11.18 (5.47)
-3.06 (6.35)
-0.43 (1.79)
+00 44 58.3970502
+55 46 47.601057
0.873 mas
1.017 mas
122.016131
-7.080364
41
00420+5530
-43.9
-8.59 (6.32)
-4.96 (6.32)
-1.06(1.89)
Get selected data
X
DSS colored
2MASS colored
WISE colored
SDSS color
IRAC color I1,I2,I4
GLIMPSE 360
PACS color (70-160 um)
SPIRE color (250-500 um)
NVSS (1.4GHz)
ATLASGAL 870 um
ATLASGAL 870 um + Planck
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UKIDSS K
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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 'MOE09' 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 'MOE09' AND detected=true AND hide=false ORDER BY detected DESC,id
