• DOI:10.1088/0004-637X/693/1/397
• Corpus ID: 18426864

TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. I. S 252 & G232.6+1.0

@article{Reid2008TRIGONOMETRICPO,
  title={TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. I. S 252 \& G232.6+1.0},
  author={Mark J. Reid and Karl M. Menten and Andreas Brunthaler and X. W. Zheng and Luca Moscadelli and Y. Xu},
  journal={The Astrophysical Journal},
  year={2008},
  volume={693},
  pages={397-405}
}

• M. Reid, K. Menten, +3 authors Y. Xu
• Published 4 November 2008
• Physics
• The Astrophysical Journal

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)(-0.026) kpc), placing it in the Perseus spiral arm. The parallax of G232.6+1.0 is 0.596 +/- 0.035 mas (1.68+-(0.11)(0.09) kpc), 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 approximate to 1 km s(-1). Both sources orbit the Galaxy similar to 13 km s(-1) slower than circular rotation.