CHEMICAL ABUNDANCE ANALYSIS OF THE RED GIANT STAR HD 94264 (46LMI)

Abstract

HD 94264 is one of the stars that less studied thoroughly in the literature. The atmospheric parameters and abundances of 26 elements (C, N, O, Na, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Y, Zr, Mo, Ba, La, Ce, Pr and Nd) are determined for the star using LTE analysis approach. Abundances of 8 elements (C, N, Cu, Zn, Mo, Ba, Ce and Pr) are determined for the first time for
this star. The ¹²C=¹³C isotope ratio of the star is also determined. Abundance of carbon is studied using the C₂ Swan band at 5086 . The wavelength interval 7980 - 8130 that contains strong ¹²C¹⁴N and ¹³C¹⁴N molecular features, allowed us to determine the nitrogen abundance and 12C=13C isotope ratio as well. Effects of the hyperne structure is also taken into account for Sc, V,
Mn, Co, Cu, La, Ba and Pr.
The spectra of the star is taken by Russian Turkish Telescope (RTT150) which is operated at TÜBTAK National Observatory. The high resolution (R=40000) and high S/N (>100) spectra are analysed using mixed approach of ne analysis and spectrum synthesis techniques.