Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86...36y&link_type=abstract
Astronomical Journal, vol. 86, Jan. 1981, p. 36-52. Research supported by the University of Illinois
Astronomy and Astrophysics
Astronomy
23
G Stars, Giant Stars, K Stars, Late Stars, Milky Way Galaxy, Stellar Motions, Anomalies, Astronomical Catalogs, Cn Emission, Radial Velocity, Velocity Distribution
Scientific paper
Space velocities and composition indices have been determined for 393 G and K giants for which radial velocities were previously measured by Griffin. Absolute magnitudes and CN anomalies were obtained through DDO photometry. A clear correlation exists between the velocity dispersion in the W component and delta CN; the gradient is approximately -72 km/s delta CN. Relationships involving the U and V components and delta CN are more complex, presumably due to the mixture of older stars formed nearer galactic center, where the interstellar medium enrichment rate is greater, with younger strong-CN stars formed farther from galactic center. Several stars are found to have DDO characteristics similar to those of 'halo population' stars with extreme metal underabundance.
Hartkopf William I.
Karman R. A.
Yoss Kenneth M.
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