Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98..699h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 98, Aug. 1989, p. 699-715.
Astronomy and Astrophysics
Astronomy
5
A Stars, Barium, Metallic Stars, Star Distribution, Stellar Motions, Kinematics, Main Sequence Stars, Radial Velocity, Stellar Evolution, Stellar Magnitude
Scientific paper
The possibility of an evolutionary link between Am stars and barium stars is considered, and an examination of previous data suggests that barium star precursors are main-sequence stars of intermediate mass, are most likely A and/or F dwarfs, and are intermediate-mass binaries with close to intermediate orbital separations. The possible role of mass transfer in the later development of Am systems is explored. Mass transfer and loss from systems with a range of masses and orbital separations may explain such statistical peculiarities of barium stars as the large dispersion in absolute magnitude, the large range of elemental abundances from star to star, and the small number of stars with large peculiar velocities.
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