Abstract
view Abstract Citations (65) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Kinematic Modeling of the Galaxy. II. Two Samples of High Proper-Motion Stars Casertano, Stefano ; Ratnatunga, Kavan U. ; Bahcall, John N. Abstract The paper analyzes two independent surveys, due to Fouts and Sandage and to Carney and Latham, of high proper motion stars with photoelectric photometry and line-of-sight velocity information. A purely kinematic study of both samples indicates that a two-component classical (disk + spheroid) model of the Galaxy is inadequate to represent the kinematics of stars in the solar neighborhood. A component with intermediate kinematic properties (old disk) is required. An asymmetric drift of 50 + or - 15 km/s and principal velocity dispersions of (66, 37, 38) + or - 10 km/s are determined, in good agreement with the results of the metallicity-based analysis of Sandage and Fouts and of Carney and collaborators. The density of this component is poorly constrained, and is 10 percent + or - 5 percent of the local disk density for the same color range; the scale height is less than 1 kpc. Publication: The Astrophysical Journal Pub Date: July 1990 DOI: 10.1086/168933 Bibcode: 1990ApJ...357..435C Keywords: Astronomical Models; Electrophotometry; Galactic Structure; Milky Way Galaxy; Stellar Motions; Astronomical Catalogs; Kinematics; Line Of Sight; Solar Neighborhood; Velocity Distribution; Astrophysics; GALAXIES: THE GALAXY; GALAXIES: STELLAR CONTENT; STARS: HIGH-VELOCITY; STARS: STELLAR DYNAMICS full text sources ADS | Related Materials (1) Part 1: 1989ApJ...339..106R
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