High Resolution Echelle Spectroscopy of Two High Proper Motion Stars: HD 102870 and BD+20 3603

TL;DR

This study conducts a detailed chemical abundance analysis of two high proper motion F-type stars using high-resolution spectroscopy to determine their fundamental parameters and Galactic population memberships.

Contribution

It provides the first detailed chemical abundance analysis of these two specific high proper motion stars using high-resolution spectra.

Findings

HD 102870 is a thin disk star.

BD+20 3603 is a halo star.

Chemical compositions differ significantly between the two stars.

Abstract

A chemical abundance analysis is made of two F type high proper motion stars selected from the {\sc ELODIE} library. We use high resolution (R=42\,000) and high signal to noise ratio (S/N=103, 36 $-$per$-$pixel) \'echelle spectra from the {\sc ELODIE} library of HD\,102870 and BD\,+20\,3603, as two representative F type high proper motion stars, to determine fundamental parameters and photospheric abundances of 16 chemical elements including slow (s)$-$ and rapid (r)$-$process elements from Y to Ba. The chemical composition and kinematic parameters of the stars imply that they belong to different Galactic populations: we report HD\,102870, an IAU standard radial velocity star, to be a thin disk star and BD\,+20\,3603, a metal-poor HPM star, to be a halo star.