Evidence of tidal debris from Omega Cen in the Kapteyn Group

TL;DR

This study analyzes the kinematic and chemical properties of the Kapteyn Group, suggesting that some members are remnants of Omega Centauri's tidal debris, providing insights into Galactic merger history.

Contribution

It provides the first detailed chemical and kinematic evidence linking Kapteyn Group stars to Omega Centauri's tidal debris.

Findings

14 of 16 stars share Omega Cen-like chemical patterns

Some Kapteyn stars are likely remnants of Omega Cen tidal debris

Supports the merger origin of the Kapteyn Group

Abstract

This paper presents a detailed kinematic and chemical analysis of 16 members of the Kapteyn moving group. The group does not appear to be chemically homogenous. However, the kinematics and the chemical abundance patterns seen in 14 of the stars in this group are similar to those observed in the well-studied cluster, Omega Centauri. Some members of this moving group may be remnants of the tidal debris of Omega Cen, left in the Galactic disk during the merger event which deposited Omega Cen into the Milky Way.