Other
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002kfnt...18..306m&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, v. 18, no. 4, p. 306-320
Other
Scientific paper
The atmospheric parameters, masses and abundances of 29 elements in 8 subgiants (among them 4 candidates in SMR stars) were determined. The spectra of the stars were obtained at the 1.93-m telescope of the Haute Provence observatory (France) equipped with the echelle-spectrometer ELODIE. The run of abundances with metallicity in SMR and disk stars was analyzed. The lithium and carbon abundances undergo a change along the subgiant branch. The behaviour of other elements in SMR stars follows that in the thin disk stars, and it differs appreciably from that in thick disk stars. The investigated SMR stars are probably stars of the thin disk, and their [Fe/H] values can be accepted as the upper metallicity limit for disk stars. Judging by our sample of stars, the picture of the enrichment of interstellar medium at metallicities [Fe/H] > 0 may differ from that at [Fe/H] ˜ 0. It is characterized, relative to the solar abundances, by a deficit of oxygen, Na overabundance, a slight overabundance of Ni and Co, and a lower abundance of neutron capture elements.
Gorbaneva T. N.
Kantsen L. E.
Mishenina Tamara V.
Subiran C.
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