A Paradox of a Kinematics / Metallicity Relation for the Galactic Disk Stars

Details A Paradox of a Kinematics / Metallicity Relation for the Galactic Disk Stars A Paradox of a Kinematics / Metallicity Relation for the Galactic Disk Stars

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987atsir1501....1s&link_type=abstract

Astronomicheskii Tsirkulyar NO.1501/JUL, P. 1, 1987

Astronomy and Astrophysics

Astronomy

Scientific paper

For the nearby stars it is usually believed that kinematically old stars are chemically old as well, and vice-versa. The authors' results, however, show a more complicate picture: the metal-poor F-dwarfs, being chemically older than the metal-rich G-dwarfs, are kinematically younger than these G-dwarfs, the same is valid for the case of metal-poor G-giants and metal-rich K-giants. This paradox could be explained if stars were borne with all metallicities now observed for the disk population stars, the metallicity range being narrowed as time goes on, and the mean metallicity being increased.

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