Kinematic Analysis of Near and Far Stars in the Hipparcos Catalog

Details Kinematic Analysis of Near and Far Stars in the Hipparcos Catalog Kinematic Analysis of Near and Far Stars in the Hipparcos Catalog

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap.....46..224d&link_type=abstract

Astrophysics (English translation of Astrofizika), v. 46, Issue 2, p. 224-233 (2003).

Astronomy and Astrophysics

Astrophysics

Stars - Stars Kinematics

Scientific paper

The proper motions of stars in the main sequence and of luminosity class III giants are analyzed kinematically. A new method has been used for reliably separating all the parameters of the Ogorodnikov-Milne model based on representing the proper motions of the stars in coordinate systems whose poles lie on each of the three principal axes of the galactic trihedron. Solutions for stars in different spectral classes are obtained. The main sequence is found to subdivide into two zones (near and far stars) with a fairly sharp boundary at B-V=0.5. It is shown that the Parenago effect may be related to the different distances from the sun of the main sequence stars.

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