Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99..201c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 99, Jan. 1990, p. 201-220. Research supported by the Bowling Green State University.
Astronomy and Astrophysics
Astronomy
64
Halos, Metallic Stars, Milky Way Galaxy, Sky Surveys (Astronomy), Stellar Motions, Heavy Elements, Kinetic Energy, Stellar Mass, Stellar Orbits
Scientific paper
Using data already presented for a survey of proper motion stars and the Bahcall, Schmidt, and Soneira (1983) model of the Galaxy, Galactic orbital parameters are computed, including planar and three-dimensional eccentricities, apo- and perigalacticon distances, and maximum distances reached above/below the plane, based on extreme values for R and the absolute value of Z over 15 azimuthal periods. The orbital data are used to bin the survey's stars by apogalacticon and maximum Z distances. In an attempt to isolate a halo population sample, analyses are restricted to those stars that lag behind the local standard of the rest's circular orbital velocity by 50, 100, 150, and 200 km/s. The mean metallicities of the stars in a variety of Rapo and Zmax bins are compared .
Aguilar Luis
Carney Bruce W.
Laird John B.
Latham David W.
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