SIMBAD references

2014ApJ...781...89Z - Astrophys. J., 781, 89 (2014/February-1)

The parallax of W43: a massive star-forming complex near the galactic bar.

ZHANG B., MOSCADELLI L., SATO M., REID M.J., MENTEN K.M., ZHENG X.W., BRUNTHALER A., DAME T.M., XU Y. and IMMER K.

Abstract (from CDS):

We report trigonometric parallax measurements of masers in the massive star-forming complex W43 from Very Long Baseline Array observations as part of the Bar and Spiral Structure Legacy Survey. Based on measurements of three 12 GHz methanol maser sources (G029.86-00.04, G029.95-00.01, and G031.28+00.06) and one 22 GHz water maser source (G031.58+00.07) toward W43, we derived a distance of 5.49–0.34+0.39 kpc to W43. By associating the masers with CO molecular clouds, and associating the clouds kinematically with CO longitude-velocity spiral features, we assign W43 to the Scutum spiral arm, close to the near end of the Galactic bar. The peculiar motion of W43 is about 20 km/s toward the Galactic Center and is very likely induced by the gravitational attraction of the bar.

Abstract Copyright:

Journal keyword(s): astrometry - Galaxy: kinematics and dynamics - masers - stars: formation - stars: individual: W43 - techniques: high angular resolution

Simbad objects: 13

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2020.01.22-09:36:13

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