Intracluster Globular Clusters

Details Intracluster Globular Clusters Intracluster Globular Clusters

1995-08-29

arxiv.org/abs/astro-ph/9508141v1

Astronomy and Astrophysics

Astrophysics

9 pages, uuencoded compressed postscript. Accepted for publication in the Astrophysical Journal Letters

Scientific paper

10.1086/309748

Globular cluster populations of supergiant elliptical galaxies are known to vary widely, from extremely populous systems like that of UGC 9799, the centrally dominant galaxy in Abell 2052, to globular-cluster-poor galaxies such as NGC 5629 in Abell 2666. Here we propose that these variations point strongly to the existence of a population of globular clusters that are not bound to individual galaxies, but rather move freely throughout the cores of clusters of galaxies. Such intracluster globular clusters may have originated as tidally stripped debris from galaxy interactions and mergers, or alternatively they may have formed in situ in some scenarios of globular cluster formation.

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