A Census of Nuclear Star Clusters in Late-Type Spiral Galaxies

Details A Census of Nuclear Star Clusters in Late-Type Spiral Galaxies A Census of Nuclear Star Clusters in Late-Type Spiral Galaxies

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8599b&link_type=abstract

HST Proposal ID #8599

Physics

Hst Proposal Id #8599 Galaxies

Scientific paper

We conduct a WFPC2 I-band snapshot survey of a well-defined sample of nearby, face-on spiral galaxies of type Scd or later. Given the sizes of known nuclear clusters {R_eff approximately 0.2 arcsec}, HST provides an order of magnitude contrast improvement over ground-based imaging, crucial for an unambiguous identification of the cluster. The data will yield cluster sizes and unblended luminosities, which are impossible to obtain from the ground. This program will be the first systematic census of nuclear star clusters in late-type spirals. As such, it will provide a valuable catalog for follow-up spectroscopy to study the stellar populations, masses, and ages of these clusters, all of which are important diagnostics for understanding their formation mechanism and possible influence on the surrounding bulge.

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