Three-dimensional motion of dwarf stars and RR Lyrae variables

Details Three-dimensional motion of dwarf stars and RR Lyrae variables Three-dimensional motion of dwarf stars and RR Lyrae variables

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pasp...91..553s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 91, Aug.-Sept. 1979, p. 553-570. Research supported by the Japan Societ

Astronomy and Astrophysics

Astronomy

44

Astronomical Models, Cepheid Variables, Dwarf Stars, Galactic Evolution, Stellar Motions, Three Dimensional Motion, Chemical Composition, High Speed, Kinematic Equations, Low Speed, Metallic Stars, Tables (Data), Three Dimensional Models

Scientific paper

A collection of 220 high-velocity dwarfs, 532 low-velocity dwarfs, and 114 RR Lyrae variables is given in tables with calculations of kinematical quantities in a three-dimensional model of galactic space. A metal indicator, Delta-S, for RR Lyrae variables is transformed into the ultraviolet excess, delta (0.6), which is utilized for a statistical study of kinematics under the same metallicity classification. It is found that the primordial Galaxy contracted by a factor of at least 20 in the radial direction as compared to at least 50 in the Z direction.

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