Evidence of the Galactic outer ring R1R2' from young open clusters and OB-associations

The distribution of young open clusters in the Galactic plane within 3 kpc from the Sun suggests the existence of the outer ring \(R_{1}R_{2}'\) in the Galaxy. The optimum value of the solar position angle with respect to the major axis of the bar, \(\theta_{\mathrm{b}}\), providing the best agreement between the distribution of open clusters and model particles is \(\theta_{\mathrm{b}}=35\pm10^{\circ}\). The kinematical features obtained for young open clusters and OB-associations with negative Galactocentric radial velocity \(V_{R}\) indicate the solar location near the descending segment of the outer ring \(R_{2}\).