Trigonometric Parallaxes of Star-forming Regions beyond the Tangent Point of the Sagittarius Spiral Arm - Wu, Y. W.; Reid, M. J.; Sakai, N.; Dame, T. M.; Menten, K. M.; Brunthaler, A.; Xu, Y.; Li, J. J.; Ho, B.; Zhang, B.; Rygl, K. L. J.; Zheng, X. W. (The Astrophysical journal, 2019)
Keywords: astrometry; Astrophysics; Galaxy: kinematics and dynamics; Galaxy: structure; masers; Massive stars; Milky Way; Parallax; Pitch (inclination); Star formation; Stars & galaxies; stars: formation