Isolated massive stars in the Galactic center: The dynamic contribution from the Arches and Quintuplet star clusters

Abstract

Recently, more than 100 Wolf-Rayet and OB stars were identified in the Galactic center. About a third of these sources are not spatially associated with any of the known star clusters in this region. We probe the distribution of drifted sources in numerical models of the massive clusters in the Galactic center and compare it to the observed distribution of isolated massive sources in this region. We find that stars as massive as 100 Msun drift away from the center of each cluster by up to ~60 pc using the cluster models. Our best model reproduces ~60% of the known isolated massive stars out to 80 pc from the center of the Arches cluster. This number increases to 70%-80% when we only consider the region of ~20 pc from the Arches cluster.

Accepted for publication in A&A

References in corpus (10)

• Binary interaction dominates the evolution of massive stars
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• The most massive stars in the Arches cluster
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• A Catalog of X-ray Point Sources from Two Megaseconds of Chandra Observations of the Galactic Center
• The proper motion of the Arches cluster with Keck Laser-Guide Star Adaptive Optics
• Cluster Core Dynamics at the Galactic Center
• The Quintuplet Cluster III. Hertzsprung-Russell diagram and cluster age
• The Quintuplet Cluster II. Analysis of the WN stars
• Young Massive Clusters

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