The subsystem of long-period variable stars. I - Proper motions and kinematics

Details The subsystem of long-period variable stars. I - Proper motions and kinematics The subsystem of long-period variable stars. I - Proper motions and kinematics

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992kfnt....8...73k&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 8, Jan.-Feb. 1992, p. 73-80. In Russian.

Astronomy and Astrophysics

Astronomy

5

Galactic Rotation, Kinematic Equations, Stellar Motions, Variable Stars, Astronomical Photometry, Radial Velocity, Stellar Mass, Stellar Orbits

Scientific paper

A combined catalog of proper motions for 303 long-period variable stars is compiled. Their kinematic characteristics and elements of Galactic orbits as a function of age are determined on the basis of the catalog's data, radial velocities, and estimates of distances. The Galactic rotation constant A (in km/s kpc) and the age T (in 10 exp 9 yr) are related as: A = (-2.4 +/- 0.8)T + (32 +/- 2), i.e., for old stars the Galactic rotation law approximates the rigid body law, and at the time of their formation (not less than 10 exp 10 yr) the Galaxy had a more regular mass distribution.

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