SIMBAD references

2009ApJ...693..397R - Astrophys. J., 693, 397-405 (2009/March-1)

Trigonometric parallaxes of massive star-forming regions. I. S 252 & G232.6+1.0.

REID M.J., MENTEN K.M., BRUNTHALER A., ZHENG X.W., MOSCADELLI L. and XU Y.

Abstract (from CDS):

We are conducting a large program with the NRAO Very Long Baseline Array (VLBA) to measure trigonometric parallaxes of massive star-forming regions across the Milky Way. Here we report measurement of the parallax and proper motion of methanol masers in S 252 and G232.6+1.0. The parallax of S 252 is 0.476±0.006 mas (2.10+0.027–0.026kpc), placing it in the Perseus spiral arm. The parallax of G232.6+1.0 is 0.596±0.035 mas (1.68+0.11 –0.09kpc), placing it between the Carina-Sagittarius and Perseus arms, possibly in a Local (Orion) spur of the Carina-Sagittarius arm. For both sources, kinematic distances are significantly greater than their parallax distances. Our parallaxes and proper motions yield full space motions accurate to ~1 km/s. Both sources orbit the Galaxy ∼13 km/s slower than circular rotation.

Abstract Copyright:

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

Simbad objects: 15

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2019.09.23-09:56:35

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