Abstract
We investigate some aspects of Galactic disc kinematics based on the data on open clusters from the current version of “The Homogeneous Catalog of the Main Parameters of Open Star Clusters” and from Gaia DR2. Based on the radial velocity and proper motion data for the clusters we determine the angular velocity of the Sun in the Galaxy as Ω0 = 25.6 ± 1.2 km s-1 kpc-1. A new approximation of the Galactic rotation curve by a polynomial in inverse powers of galactocentric distances is constructed. We consider the influence of spiral density waves on the smoothed velocity field of the Galactic disc. The radial fR = 4.6 ± 0.7 km s-1 and tangential fϑ = 1.1 ± 0.4 km s-1 amplitudes of the velocity field distortion are estimated from the radial dependences of the residual spatial velocity components of the clusters.
Similar content being viewed by others
References
A. V. Loktin and M. E. Popova, Astrophysical Bulletin 72, 257 (2017).
Gaia Collaboration, A. G. A. Brown, A. Vallenari, et al., Astron. and Astrophys. 616, A1 (2018).
M. É. Popova and A. V. Loktin, Astronomy Letters 31, 663 (2005).
G. Kordopatis, G. Gilmore, M. Steinmetz, et al., Astron. J. 146, 134 (2013).
T. Cantat-Gaudin, C. Jordi, A. Vallenari, et al., VizieR Online Data Catalog 361 (2018).
A. V. Loktin and G. V. Beshenov, Astronomy Reports 47, 6 (2003).
T. P. Gerasimenko, Astronomy Reports 48, 103 (2004).
M. E. Popova, Astronomische Nachrichten 334, 756 (2013).
Y. Sofue, Mass Distribution and Rotation Curve in the Galaxy (2013), p. 985.
A. V. Loktin and M. E. Popova, Astronomical and Astrophysical Transactions 27, 379 (2012).
M. W. Feast and M. Shuttleworth, Monthly Notices Royal Astron. Soc. 130, 243 (1965).
D. Russeil, A. Zavagno, P. Mège, et al., Astron. and Astrophys. 601, L5 (2017).
M. E. Popova and A. V. Loktin, Astronomy Letters 31, 171 (2005).
M. É. Popova, Astronomy Letters 32, 244 (2006).
Y. N. Mishurov and I. A. Zenina, Astron. and Astrophys. 341, 81 (1999).
A. M. Mel’nik, A. K. Dambis, and A. S. Rastorguev, Astronomy Letters 27, 521 (2001).
M. V. Zabolotskikh, A. S. Rastorguev, and A. K. Dambis, Astronomy Letters 28, 454 (2002).
V. V. Bobylev, A. T. Bajkova, and A. S. Stepanishchev, Astronomy Letters 34, 515 (2008).
V. V. Bobylev and A. T. Bajkova, Monthly Notices Royal Astron. Soc. 441, 142 (2014).
M. E. Popova and A. V. Loktin, Astronomy Letters 34, 551 (2008).
V. V. Bobylev and A. T. Bajkova, Monthly Notices Royal Astron. Soc. 437, 1549 (2014).
Funding
This work was supported in part by the Ministry of Education and Science (the basic part of the State assignment, RK no. AAAA-A17-117030310283-7) and by the Act no. 211 of the Government of the Russian Federation, agreement no. 02.A03.21.0006.
Author information
Authors and Affiliations
Corresponding authors
Additional information
Russian Text © The Author(s), 2019, published in Astrofizicheskii Byulleten’, 2019, Vol. 74, No. 3, pp. 271–278.
Conflict of Interest
The author declares no conflict of interest.
Rights and permissions
About this article
Cite this article
Loktin, A.V., Popova, M.E. Kinematics of Open Star Clusters Based on the Data of the New Version of the “Homogeneous Catalog of Open Cluster Parameters”. Astrophys. Bull. 74, 270–276 (2019). https://doi.org/10.1134/S1990341319030039
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1990341319030039