Virgo's Intracluster Globular Clusters as Seen by the Advanced Camera for Surveys
Williams, Benjamin F; Ciardullo, Robin; Durrell, Patrick R; Feldmeier, John J; Sigurdsson, Steinn; Vinciguerra, Matt; Jacoby, George H; von Hippel, Ted; Ferguson, Henry C; Tanvir, Nial R; Arnaboldi, Magda; Gerhard, Ortwin; Aguerri, J Alfonso L; Freeman, Kenneth
We report the discovery of four candidate intracluster globular clusters (IGCs) in a single deep HST ACS field of the Virgo Cluster. We show that each cluster is roughly spherical, has a magnitude near the peak of the Virgo globular cluster luminosity function, has a radial profile that is best fitted by a King model, and is surrounded by an excess of point sources that have the colors and magnitudes of cluster red giant stars. Despite the fact that two of our IGC candidates have integrated...[Show more]
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