naa a22 4500 510790054 CHVBK 20180411083316.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1134/S1063773713120037 doi (NATIONALLICENCE)springer-10.1134/S1063773713120037 Galactic rotation curve and spiral density wave parameters from 73 masers [Elektronische Daten] [V. Bobylev, A. Bajkova] Based on kinematic data on masers with known trigonometric parallaxes and measurements of the velocities of HI clouds at tangential points in the inner Galaxy, we have refined the parameters of the Allen-Santillan model Galactic potential and constructed the Galactic rotation curve in a wide range of Galactocentric distances, from 0 to 20 kpc. The circular rotation velocity of the Sun for the adopted Galactocentric distance R 0 = 8 kpc is V 0 = 239 ± 16 km s−1. We have obtained the series of residual tangential, ΔV θ , and radial, V R , velocities for 73 masers. Based on these series, we have determined the parameters of the Galactic spiral density wave satisfying the linear Lin-Shu model using the method of periodogram analysis that we proposed previously. The tangential and radial perturbation amplitudes are f θ = 7.0±1.2 km s−1 and f R = 7.8±0.7 km s−1, respectively, the perturbation wave length is λ = 2.3±0.4 kpc, and the pitch angle of the spiral pattern in a two-armed model is i = −5.2° ±0.7°. The phase of the Sun ζ ⊙ in the spiral density wave is −50° ± 15° and −160° ± 15° from the residual tangential and radial velocities, respectively. Pleiades Publishing, Inc., 2013 Galactic kinematics and dynamics nationallicence spiral density waves nationallicence masers nationallicence Bobylev V. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, 196140, St. Petersburg, Russia aut Bajkova A. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, 196140, St. Petersburg, Russia aut Astronomy Letters Springer US; http://www.springer-ny.com 39/12(2013-12-01), 809-818 1063-7737 39:12<809 2013 39 11443 https://doi.org/10.1134/S1063773713120037 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713120037 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bobylev V. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, 196140, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Bajkova A. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, 196140, St. Petersburg, Russia aut NATIONALLICENCE 773 0- Astronomy Letters Springer US; http://www.springer-ny.com 39/12(2013-12-01), 809-818 1063-7737 39:12<809 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer