Astronomy and Astrophysics – Astronomy
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1140s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 91, May 1986, p. 1140-1188.
Astronomy and Astrophysics
Astronomy
85
Abundance, Astronomical Catalogs, Stellar Motions, Stellar Spectrophotometry, Subdwarf Stars, Ubv Spectra, Galactic Rotation, Main Sequence Stars, Metallicity, Stellar Parallax, Stellar Rotation
Scientific paper
UBV photometry is given for 1690 high-proper-motion stars, providing a finding list for potential high-velocity stars of various metallicity values. The purpose of the survey is to obtain candidates for trigonometric programs on subdwarfs and to enlarge the sample with which to study the relation between stellar kinematics and metal abundance. Photometric parallaxes are obtained. A list of 113 stars with tangential space velocities ST ≥ 300 km s-1 is given. The highest tangential velocities relative to the Sun are ST ≅ 630 km s-1, but the local value of ST(max) varies with galactic longitude. Using the variation of ST(max) with longitude and adopting the galactic rotation at the solar circle to be vrot = 220 km s-1, the authors estimate the rotation of the subdwarf system to be vrot(halo) ≡ 0±50 km s-1.
Kowal Charles
Sandage Alan
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