Physics
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6104h&link_type=abstract
HST Proposal ID #6104
Physics
Hst Proposal Id #6104 Galaxies &Amp, Clusters
Scientific paper
We will use WFPC2 in V and I to image the globular cluster system around NGC4874, the central supergiant elliptical in the Coma Cluster, to a limiting magnitude V eq 28. The three principal scientific goals are: {1} To measure the luminosity distribution of the globular clusters in the galaxy, and thus the mass distribution function of the clusters, to M_V{lim} eq -7.0, fainter than the LF peak frequency or `turnover' point. {2} To obtain the total cluster population {specific frequencies S_N} of the galaxy, thus measuring the cluster formation efficiency and testing the {uncertain} ground-based observations that NGC 4874 has a high specific frequency like M87. {3} To measure the metallicity distribution function {MDF} of the clusters, including the cluster-to-cluster metallicity dispersion and the mean metallicity gradient within the system. These data will allow us to investigate the chemical enrichment history, mass distribution, and formation efficiency of globular clusters within NGC 4874, and they will extend our study of these phenomena to a much richer and denser galaxy environment than is accessible from ground-based imaging.
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