The stellar content of nuclear star clusters in spiral galaxies

Details The stellar content of nuclear star clusters in spiral galaxies The stellar content of nuclear star clusters in spiral galaxies

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4834...57b&link_type=abstract

Discoveries and Research Prospects from 6- to 10-Meter-Class Telescopes II. Edited by Guhathakurta, Puragra. Proceedings of th

Physics

4

Scientific paper

We discuss first results from a spectroscopic survey of nuclear star clusters in nearby, late-type spiral galaxies. The data, obtained with the Space Telescope Imaging Spectrograph (STIS), allow us to derive cluster ages via stellar population synthesis methods. We present some typical data sets, describe the fitting algorithm, and discuss the results for the 6 objects studied so far. We find that only one nuclear cluster spectrum is dominated by a population older than 1 Gyr. In all cases, the fit is significantly improved by allowing for multiple generations of stars. Although preliminary, these results support the notion that nuclear cluster formation is most likely a repetitive process.

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