Computer Science
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8164w&link_type=abstract
HST Proposal ID #8164
Computer Science
Hst Proposal Id #8164 Galaxy Populations And Interactions
Scientific paper
The origin of the anomalously rich globular cluster populations surrounding many supergiant elliptical galaxies remains one of the great unsolved problems in the study of extragalactic globular cluster systems. A number of authors have suggested that the intrinsic globular cluster populations of such galaxies may have been augmented by large numbers of intergalactic globular clusters which are not bound to individual galaxies but, instead, roam freely throughout the cores of clusters of galaxies. Although there is now considerable circumstantial evidence in support of this view, efforts to detect intergalactic globular clusters directly have thus far been thwarted by the complication that most galaxy clusters have a supergiant elliptical galaxy residing at their dynamical centre, which makes it impossible to separate bona fide intergalactic globulars from the galaxy's own intrinsic population. To avoid this difficulty, we propose to search for intergalactic globulars in th e rich, nearby cluster Abell 1185, since its brightest member galaxy is offset from the X-ray centroid by eq 4 arcmin {150 kpc}. A series of deep WFPC2 images centered on the peak of the X-ray distribution in Abell 1185 should reveal a population of intergalactic globular cluster if it exists. The detection {or non-detection} of such globular clusters will provide important new constraints on galaxy interactions and evolution in clusters.
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