Astron. Astrophys. Suppl. Ser. 138, 47-54

Atmosphere parameters of four K-giants obtained by spectrum fitting

J. Krticka and V. Stefl

Send offprint request: J. Krticka

Dept. of Theor. Phys. and Astrophysics, Faculty of Science, Masaryk University, Kotlárská 2, CZ-611 37 Brno, Czech Republic

Received April 30, 1998; accepted March 2, 1999

Abstract:

Basic parameters of the atmospheres (i.e., $T_{\mathrm{eff}}$, $\log g$, [A/H], $v_{\mathrm{turb}}$) of four late type giant stars $\alpha$ Ari, $\alpha$ Boo, $\alpha$ Cas, $\beta$ Gem are obtained by matching synthetic spectra to observed ones. We used model atmosphere to compute the synthetic spectrum. The parameters of the model atmosphere and of the synthetic spectrum are fitted to match the observed spectrum, accelerated by means of a proposed numerical tool.

Key words: stars: fundamental parameters -- stars: abundances -- stars: $\alpha$ Ari; $\alpha$ Boo; $\alpha$ Cas; $\beta$ Gem