Trigonometric Parallaxes of Massive Star-forming Regions. IX. The Outer Arm in the First Quadrant

Authors: 
Sanna, A.; Reid, M. J.; Dame, T. M.; Menten, K. M.; Brunthaler, A.; Moscadelli, L.; Zheng, X. W.; Xu, Y.
Year: 
2 012
arXiv: 
http://arxiv.org/abs/1110.4313
Sub project: 
A
Journal Reference: 
2012ApJ...745...82S