Chemical Composition of the RS CVn-type Star 33 Piscium

TL;DR

This study analyzes the chemical abundances of 22 elements in the RS CVn-type star 33 Psc, revealing insights into its stellar composition and mixing processes using high-resolution spectra.

Contribution

It provides the first detailed chemical abundance analysis of 33 Psc, including key isotopic ratios, using high-resolution spectra and MARCS model atmospheres.

Findings

Determined stellar parameters: T_eff=4750K, log g=2.8, [Fe/H]=-0.09.

Measured isotopic ratio 12C/13C=30, indicating no extra-mixing.

Identified first-dredge-up mixing signatures in the star.

Abstract

Abundances of 22 chemical elements, including the key elements and isotopes such as 12C/13C, N and O, are investigated in the spectrum of 33 Psc, a single-lined RS CVn-type binary of low magnetic activity. The high resolution spectra were observed on the Nordic Optical Telescope and analyzed with the MARCS model atmospheres. The following main parameters have been determined: T_eff = 4750 K, log g = 2.8, [Fe/H] = -0.09, [C/Fe] = -0.04, [N/Fe] = 0.23, [O/Fe] = 0.05, C/N = 2.14, 12C/13C = 30, which show the first-dredge-up mixing signatures and no extra-mixing.