Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21731202c&link_type=abstract
American Astronomical Society, AAS Meeting #217, #312.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
We have investigated the age distributions of GC systems in 14 early-type galaxies using homogeneously derived K-band LIRIS/WHT and archival g and z ACS/HST photometry. A relative comparison between the different GC systems was performed where relative age differences were quantified. We report the finding of a correlation between the morphological type of a galaxy and mean relative GC ages. Galaxies with simple morphology such as E0s, E1s and E2s seem to have genuinely old clusters whereas S0s have younger GC systems. Surprisingly, this appears to be driven by the more metal-poor clusters. We suggest that E type galaxies assembled most of their GCs in a shorter and earlier period than S0 type galaxies. The latter galaxy type, seems to have a more extended period of GC formation/assembly.
Anders Peter
Brodie Jean P.
Chies Santos Ana
Kuntschner Harald
Larsen Soeren S.
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