Computer Science
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4423z&link_type=abstract
HST Proposal ID #4423
Computer Science
Hst Proposal Id #4423
Scientific paper
Both theoretical and observational studies have demonstrated that elliptical galaxies can form through the merger of spirals. However, the higher specific frequency of globular clusters around early-type galaxies suggests that most ellipticals were not formed in this way, unless new globular clusters form during the mergers which make the ellipticals. Although there is some evidence supporting the production of young globular clusters in merging systems, ground- based data cannot distinguish between globulars and more extended star-forming complexes. Relevant HST data are currently restricted to two cases, one of which may be related to an X-ray cooling flow rather than a straightforward merger. We propose to resolve this dilemma by imaging three systems, carefully chosen to be representative of ongoing mergers, to search for recently formed globular clusters. Ground-based observations already show young stellar aggregates in these merging galaxies but Planetary Camera images are essential to determining if these aggregates are sufficiently dense to be genuine globular clusters.
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