Comprehensive abundance analysis of red giants in the open clusters NGC 2527, 2682, 2482, 2539, 2335, 2251 and 2266

TL;DR

This study conducts a detailed chemical abundance analysis of red giants in seven open clusters in the Galactic anticentre, confirming memberships and comparing results with existing data to understand their chemical properties.

Contribution

It provides high-resolution abundance measurements for red giants in seven open clusters, expanding knowledge of their chemical compositions and Galactic distribution.

Findings

Cluster members confirmed via radial velocity.

Abundance errors minimized to 0.02-0.05 dex.

Results for NGC 2682 (M 67) agree with previous studies.

Abstract

We have analyzed high-resolution echelle spectra of red giant members for seven open clusters in the Galactic anticentre direction to explore their chemical positions. Cluster membership has been confirmed by radial velocity. The spread in temperatures and gravities being very small among the red giants, nearly the same stellar lines were employed for all stars thereby reducing the abundance errors: the errors of the average abundance for a cluster were generally in the 0.02 to 0.05 dex range. Our present sample covers Galactocentric distances of 8.3 to 11.3 kpc and an age range of 0.2 to 4.3 Gyr. A careful comparison of our results for the cluster NGC 2682 (M 67) to other high-resolution abundance studies in the literature shows general good agreement for almost all elements in common.