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25 April 2024
 
  » arxiv » astro-ph/0001517

 Article overview



A Young Globular Cluster in the Galaxy NGC 6946
B.G. Elmegreen ; Y.N. Efremov ; S. Larsen ;
Date 29 Dec 1999
Subject astro-ph
Affiliation IBM Watson NY MSU, Moscow Copenhagen Univ. Astronomical Obs.
AbstractA globular cluster ~15 My old that contains 5x10^5 Msun of stars inside an 11 pc radius has been found in the nearby spiral galaxy NGC 6946, surrounded by clouds of dust and smaller young clusters inside a giant circular bubble 300 pc in radius. At the edge of the bubble is an arc of regularly-spaced clusters that could have been triggered during the bubble’s formation. The region is at the end of a spiral arm, suggesting an origin by the asymmetric collapse of spiral arm gas. The globular is one of the nearest examples of a cluster that is similar to the massive old globulars in the Milky Way. We consider the energetics of the bubble and possible formation mechanisms for the globular cluster, including the coalescence of smaller clusters.
Source arXiv, astro-ph/0001517
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