2006ApJ...645..337H

Query : 2006ApJ...645..337H

2006ApJ...645..337H - Astrophys. J., 645, 337-344 (2006/July-1)

Water maser motions in W3(OH) and a determination of its distance.

HACHISUKA K., BRUNTHALER A., MENTEN K.M., REID M.J., IMAI H., HAGIWARA Y., MIYOSHI M., HORIUCHI S. and SASAO T.

Abstract (from CDS):

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 relative to the ultracompact H II region W3(OH).

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Journal keyword(s): Astrometry - Masers - Stars: Distances - Stars: Formation - stars: individual: (W3(OH)) - Stellar Dynamics

Nomenclature: Table 2: [HBM2006] NN (Nos 1-42).

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
2 NAME Turner-Welch Object Y*O 02 27 04.717 +61 52 24.73           ~ 31 0
3 ICRF J024457.6+622806 Sy1 02 44 57.6967097952 +62 28 06.517098084   12.15 12.19     ~ 310 2
4 6C 035545+504923 Bla 03 59 29.74727351 +50 57 50.1618607           ~ 480 1
5 V* V2254 Ori Or* 05 35 14.11296 -05 22 22.7316           B 320 2
6 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
7 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 673 1
8 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
9 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
10 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
11 V* UX Cyg OH* 20 55 05.5117404456 +30 24 52.015482108       10.404   M6-6.5e 171 0

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