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HAC06 - Water Maser Motions in W3(OH) and a Determination of Its Distance

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Short title: Hachisuka et al. (2006)
Authors: Hachisuka, K.Brunthaler, A.Menten, K. M.Reid, M. J.Imai, H.Hagiwara, Y.Miyoshi, M.Horiuchi, S.Sasao, T.
Journal: The Astrophysical Journal, Volume 645, Issue 1, pp. 337-344.
Bibcode:

Target type: High_mass_SFR

Abstract
We report phase-referencing VLBA observations of H2O masers near the star-forming region W3(OH) to measure their parallax and absolute proper motions. The measured annual parallax is 0.489+/-0.017 mas (2.04+/-0.07 kpc), where the error is dominated by a systematic atmospheric contribution. This distance is consistent with photometric distances from previous observations and with the distance determined from CH3OH maser astrometry presented in a related paper. We also find that the source driving the H2O outflow, the ``TW-object,'' moves with a three-dimensional velocity of >7 km s-1 relative to the ultracompact H II region W3(OH).

Abstract

We report phase-referencing VLBA observations of H2O masers near the star-forming region W3(OH) to measure their parallax and absolute proper motions. The measured annual parallax is 0.489+/-0.017 mas (2.04+/-0.07 kpc), where the error is dominated by a systematic atmospheric contribution. This distance is consistent with photometric distances from previous observations and with the distance determined from CH3OH maser astrometry presented in a related paper. We also find that the source driving the H2O outflow, the ``TW-object,'' moves with a three-dimensional velocity of >7 km s-1 relative to the ultracompact H II region W3(OH).

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Detection table from Hachisuka et al. (2006)

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Maser spot	Source name	Image	Descr.	Line	V_peak	μ_X	μ_Y	F_peak	Telescope	V_step	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)							H₂O	(km/s)	(mas/yr)	(mas/yr)	(mJy/beam)		(km/s)	Yes/No		(kpc)
1	+02 27 4.8362	+61 52 24.607			133.9491977	1.0649199	G133.949+1.064			W3(OH)	Image	Descr	22 GHz;	-50.9			304.6	VLBA	0.224	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2001 Jan - 2002 May
	+02 27 4.82655933	+61 52 24.46255	-144.49 mas	-144.29 mas	133.949194	1.064876		1	1	W3(OH)				304.6	0.62 (0.13)	2.3 (0.18)	304.6
	+02 27 4.83634733	+61 52 24.61311	2.33 mas	6.27 mas	133.949197	1.064922		2	2	W3(OH)				95.8	0.54 (0.28)	2.63 (0.19)	95.8
	+02 27 4.83632333	+61 52 24.61336	1.97 mas	6.52 mas	133.949197	1.064922		3	3	W3(OH)				165.5	1.06 (0.06)	1.26 (0.09)	165.5
	+02 27 4.835864	+61 52 24.60116	-4.92 mas	-5.68 mas	133.949198	1.064918		4	4	W3(OH)				335.5	0.97 (0.14)	1.41 (0.19)	335.5
	+02 27 4.835562	+61 52 24.60984	-9.45 mas	3 mas	133.949196	1.064920		5	5	W3(OH)				253.1	0.37 (0.06)	2.73 (0.05)	253.1
	+02 27 4.83555	+61 52 24.64026	-9.63 mas	33.42 mas	133.949193	1.064928		6	6	W3(OH)				367	0.87 (0.11)	2.57 (0.11)	367
	+02 27 4.835644	+61 52 24.64053	-8.22 mas	33.69 mas	133.949193	1.064928		7	7	W3(OH)				127	-0.15 (0.11)	3.06 (0.07)	127
	+02 27 4.83576667	+61 52 24.64002	-6.38 mas	33.18 mas	133.949194	1.064928		8	8	W3(OH)				12.9	0.66 (0.58)	2.88 (0.18)	12.9
	+02 27 4.83587	+61 52 24.63926	-4.83 mas	32.42 mas	133.949194	1.064928		9	9	W3(OH)				20.6	-0.17 (0.17)	2.81 (0.13)	20.6
	+02 27 4.834908	+61 52 24.64613	-19.26 mas	39.29 mas	133.949191	1.064929		10	10	W3(OH)				72.3	0.83 (0.08)	1.51 (0.2)	72.3
	+02 27 4.83528067	+61 52 24.65606	-13.67 mas	49.22 mas	133.949191	1.064932		11	11	W3(OH)				255.2	1.09 (0.29)	1.02 (0.18)	255.2
	+02 27 4.83474933	+61 52 24.67006	-21.64 mas	63.22 mas	133.949189	1.064935		12	12	W3(OH)				126.1	0.42 (0.15)	2.16 (0.09)	126.1
	+02 27 4.83483867	+61 52 24.6693	-20.3 mas	62.46 mas	133.949189	1.064935		13	13	W3(OH)				170.1	0.4 (0.31)	2.2 (0.62)	170.1
	+02 27 4.83472867	+61 52 24.67118	-21.95 mas	64.34 mas	133.949189	1.064935		14	14	W3(OH)				77.8	0.47 (0.07)	1.84 (0.2)	77.8
	+02 27 4.83440267	+61 52 24.68244	-26.84 mas	75.6 mas	133.949187	1.064938		15	15	W3(OH)				55.2	0.01 (0.09)	2.01 (0.04)	55.2
	+02 27 4.83361333	+61 52 24.70519	-38.68 mas	98.35 mas	133.949183	1.064943		16	16	W3(OH)				102.4	0.08 (0.23)	1.49 (0.08)	102.4
	+02 27 4.79332	+61 52 24.69706	-643.08 mas	90.22 mas	133.949110	1.064913		17	17	W3(OH)				41.8	2.95 (0.1)	1.82 (0.13)	41.8
	+02 27 4.79293133	+61 52 24.6986	-648.91 mas	91.76 mas	133.949109	1.064913		18	18	W3(OH)				9.7	1.86 (0.34)	1.94 (0.39)	9.7
	+02 27 4.792842	+61 52 24.69911	-650.25 mas	92.27 mas	133.949109	1.064913		19	19	W3(OH)				10.4	0.73 (0.1)	1.43 (0.1)	10.4
	+02 27 4.792816	+61 52 24.69895	-650.64 mas	92.11 mas	133.949109	1.064913		20	20	W3(OH)				35.7	0.47 (0.08)	1.4 (0.06)	35.7
	+02 27 4.79196133	+61 52 24.70233	-663.46 mas	95.49 mas	133.949107	1.064913		21	21	W3(OH)				22.5	3.96 (0.27)	1.11 (0.14)	22.5
	+02 27 4.79124267	+61 52 24.70381	-674.24 mas	96.97 mas	133.949106	1.064913		22	22	W3(OH)				7.7	4.59 (0.3)	1.04 (0.41)	7.7
	+02 27 4.79131133	+61 52 24.70327	-673.21 mas	96.43 mas	133.949106	1.064913		23	23	W3(OH)				2.1	0.07 (0.09)	1.51 (0.1)	2.1
	+02 27 4.79079267	+61 52 24.70198	-680.99 mas	95.14 mas	133.949105	1.064912		24	24	W3(OH)				6.6	6.86 (0.07)	-3.12 (0.15)	6.6
	+02 27 4.78562067	+61 52 24.55802	-758.57 mas	-48.82 mas	133.949110	1.064871		25	25	W3(OH)				3.5	3.4 (0.04)	-0.8 (0.01)	3.5
	+02 27 4.78107867	+61 52 24.56785	-826.7 mas	-38.99 mas	133.949101	1.064871		26	26	W3(OH)				7.2	3.75 (0.14)	-0.53 (0.06)	7.2
	+02 27 4.78104933	+61 52 24.56861	-827.14 mas	-38.23 mas	133.949100	1.064871		27	27	W3(OH)				2.6	1.26 (1.04)	-0.7 (0.01)	2.6
	+02 27 4.78077733	+61 52 24.57145	-831.22 mas	-35.39 mas	133.949100	1.064871		28	28	W3(OH)				3.2	2.58 (0.23)	-0.03 (0.12)	3.2
	+02 27 4.77863133	+61 52 24.59472	-863.41 mas	-12.12 mas	133.949093	1.064876		29	29	W3(OH)				30	-4.6 (0.34)	-0.18 (0.71)	30
	+02 27 4.77332667	+61 52 24.60879	-942.98 mas	1.95 mas	133.949082	1.064876		30	30	W3(OH)				0.6	-4.01 (0.99)	4 (0.15)	0.6
	+02 27 4.771968	+61 52 24.66662	-963.36 mas	59.78 mas	133.949074	1.064890		31	31	W3(OH)				32.9	-3.28 (0.24)	3.07 (0.64)	32.9
	+02 27 4.77191333	+61 52 24.66718	-964.18 mas	60.34 mas	133.949074	1.064890		32	32	W3(OH)				57.2	-5.02 (0.14)	3.01 (0.13)	57.2
	+02 27 4.771144	+61 52 24.66132	-975.72 mas	54.48 mas	133.949073	1.064888		33	33	W3(OH)				2	-4.77 (0.37)	3.31 (0.1)	2
	+02 27 4.771114	+61 52 24.66124	-976.17 mas	54.4 mas	133.949073	1.064888		34	34	W3(OH)				2.6	-1.44 (0.14)	1.19 (0.1)	2.6
	+02 27 4.770674	+61 52 24.68783	-982.77 mas	80.99 mas	133.949070	1.064894		35	35	W3(OH)				283.8	-0.06 (0.06)	-3.85 (0.11)	283.8
	+02 27 4.770628	+61 52 24.68855	-983.46 mas	81.71 mas	133.949069	1.064895		36	36	W3(OH)				658	-1.14 (0.08)	0.81 (0.33)	658
	+02 27 4.77062733	+61 52 24.6894	-983.47 mas	82.56 mas	133.949069	1.064895		37	37	W3(OH)				70.5	-3.86 (0.04)	0.82 (0.07)	70.5
	+02 27 4.770498	+61 52 24.58283	-985.41 mas	-24.01 mas	133.949080	1.064867		38	38	W3(OH)				97.7	-2.91 (0.09)	2.81 (0.08)	97.7
	+02 27 4.77027867	+61 52 24.68273	-988.7 mas	75.89 mas	133.949069	1.064893		39	39	W3(OH)				3.5	-3.2 (0.05)	0.26 (0.13)	3.5
	+02 27 4.76720067	+61 52 24.5724	-1034.87 mas	-34.44 mas	133.949075	1.064862		40	40	W3(OH)				6.5	-1.93 (0.06)	1.36 (0.09)	6.5
	+02 27 4.69979533	+61 52 24.47343	-2045.95 mas	-133.41 mas	133.948961	1.064789		41	41	W3(OH)				28.7	-3.48 (0.16)	0.67 (0.17)	28.7
	+02 27 4.687432	+61 52 24.69096	-2231.4 mas	84.12 mas	133.948917	1.064836		42	42	W3(OH)				121.1			121.1

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	Bolocam 1.1 mm
UKIDSS K Download UKIDSS K FITS	2MASS K Download 2MASS K FITS

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 'HAC06' 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 'HAC06' AND detected=true AND hide=false ORDER BY detected DESC,id

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HAC06 - Water Maser Motions in W3(OH) and a Determination of Its Distance

Interferometry data

View as list of objects

Detection table from Hachisuka et al. (2006)