A detailed kinematic and abundance analysis of old disk giants

Details A detailed kinematic and abundance analysis of old disk giants A detailed kinematic and abundance analysis of old disk giants

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...161..314c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 2, June 1986, p. 314-326.

Astronomy and Astrophysics

Astrophysics

73

Abundance, Giant Stars, Late Stars, Spectrum Analysis, Stellar Evolution, Carbon, Iron, Metallicity, Nitrogen, Oxygen, Stellar Atmospheres, Stellar Mass, Stellar Temperature

Scientific paper

Prompted by the work of various investigators (Lambert and Ries, 1981; Kjaergaard et al., 1982) the authors have undertaken a semiautomated detailed spectroscopic analysis of a relatively large (34) sample of evolved high-velocity giant stars (metal-poor members of the disk population). CNO and overall metal abundances, as well as the 12C/13C ratio, were derived. The conclusions of both the above papers were confirmed and extended, namely that for old disk giants the C/N ratios have approximately the solar ratio and the O/Fe ratio is enhanced relative to the sun. The evolutionary consequences of these more detailed results in terms of the kinematic, mass and convective mixing characteristics of these objects are discussed.

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