The chemical compositions of two stars with enhanced metallicities
Abstract
Studies of the two stars HD 121370 (8 Boo) and HD 218640 (89 Aqr) with metallicity excesses based on spectra with resolution R = 25 000 and signal-to-noise ratios of more than 100 are presented. The spectra were obtained using the echelle spectrometer of the 6-m telescope of the Special Astrophysical Observatory. Atomic and molecular spectra are used to determine the abundances for 25 elements, including Li and elements of the CNO group. The metallicities [Fe/H] for the stars are +0.23 +/- 0.15 (8 Boo) and +0.19 +/- 0.19 (89 Aqr). These values are close to the upper limit of [Fe/H] for dwarf stars in the Galactic disk.
- Publication:
-
Astronomy Reports
- Pub Date:
- March 1998
- Bibcode:
- 1998ARep...42..174M