NASA/IPAC EXTRAGALACTIC DATABASE
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For refcode 1999AJ....117.1700C:
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Copyright by American Astronomical Society. Reproduced by permission
1999AJ....117.1700C DEEP HUBBLE SPACE TELESCOPE OBSERVATIONS OF BLUE STAR CLUSTERS IN NGC 3597 MATTHEW N. CARLSON, JON A. HOLTZMAN, CARL J. GRILLMAIR, JEREMY R. MOULD, RICHARD E. GRIFFITHS, GILDA E. BALLESTER, CHRISTOPHER J. BURROWS, JOHN T. CLARKE, DAVID CRISP, ROBIN W. EVANS, JOHN S. GALLAGHER III, J. JEFF HESTER, JOHN G. HOESSEL, PAUL A. SCOWEN, KARL R. STAPELFELDT, JOHN T. TRAUGER, ALAN M. WATSON, AND JAMES A. WESTPHAL Received 1998 December 1; accepted 1999 January 12 ABSTRACT We have analyzed HST/WFPC2 images of NGC 3597 and find ~700 compact objects surrounding the galaxy with an average (B-R)_0_ ~ 0.6. We propose that the majority of these objects are young globular clusters. They have a spread in colors that is consistent with that expected for a population of young clusters with a common age and spread induced by photometric errors and reddening within NGC 3597. If these objects were similar to the Galactic globular cluster system seen at a younger age, we would predict a turnover in the luminosity function at B ~ 23. However, we find that the luminosity function for the clusters is increasing to the limits of our photometry (B ~ 27). Key words: galaxies: star clusters
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