Perhaps they are not Globular Clusters after all

Details Perhaps they are not Globular Clusters after all Perhaps they are not Globular Clusters after all

2003-10-16

arxiv.org/abs/astro-ph/0310447v1

Astronomy and Astrophysics

Astrophysics

1 page, to be published in "IAU Joint Discussion 06, Extragalactic Globular Clusters and their Host Galaxies", ASP Conf. Serie

Scientific paper

Our 2dF Fornax Cluster Spectroscopic Survey (FCSS) and follow-up work in the Virgo Cluster have shown that the cores of both galaxy clusters contain a previously-unknown class of object, ultra-compact dwarf (UCD) galaxies. We present high resolution spectroscopy and deep multicolour imaging to show that these enigmatic objects are dynamically distinct from both globular clusters (GCs) and nucleated dwarf galaxies (dE,Ns). Our hypothesis for their origin may explain the observed high ``specific frequency'' of GCs in central cluster galaxies.

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