Speaker
Description
The main goal of our investigation is to determine the atmospheric parameters as well as the chemical abundance of cold red giants. First, we selected a few dozen red giants with Teff<4200K from the APOGEE sample. We observed the spectra of the selected giants with a R=18000 spectrograph mounted on the 1-m diameter telescope of the Hungarian Piszkéstető Observatory. This is the first time the 1-m telescope has been successfully used for abundance analysis. We used a new spectral grid with updated line lists including 23 molecules to fit the observed spectra with FERRE. Moreover, we also observed some of the targets with the SONG telescope (Canary Islands) for comparison. We determined the Teff, logg, [Fe/H], and [alpha/Fe] parameters, as well as the Ba, Ca, Cr, Mn, Ni, Si, Ti, and V abundances of 18 stars in a relatively small error range with the Hungarian telescope.
