Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86.1882s&link_type=abstract
Astronomical Journal, vol. 86, Dec. 1981, p. 1882-1895.
Astronomy and Astrophysics
Astronomy
29
Early Stars, H Beta Line, Main Sequence Stars, Stellar Motions, Stellar Spectra, Stellar Spectrophotometry, A Stars, Abundance, F Stars, Hertzsprung-Russell Diagram, High Speed, Horizontal Branch Stars, Metallic Stars, O Stars, Stellar Luminosity, Sun
Scientific paper
H-beta and four-color photometry are presented for 78 early-type, high-velocity star candidates consisting of: (1) 74 candidates listed in a previous paper; and (2) four candidates identified by Eggen (1970). All of the sample appears to be near the main sequence, with the exception of five of the AO-type stars that are probably on the field Population II horizontal branch. Almost one-third of the main-sequence A stars and nearly all of the F stars are seen as true high-velocity objects, and several of the high-velocity F stars appear to have solar metal abundances. The existence of young, metal-rich, high-velocity stars is supported by the data, and it is concluded that this population may contribute one A star to every thousand stars in the solar neighborhood.
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