摘要：AbstractThe distribution of young open clusters in the Galactic plane suggests the existence of the outer ringR1R′2in the Galaxy. The solar position angleθbproviding the best agreement between the observed and model distribution isθb= 35±10°. We compared theθbvalues derived from three different catalogues of open clusters and they appear to be consistent within the errors.
关键词：KeywordsGalaxy: structureGalaxy: kinematics and dynamics, open clusters and associations
