Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..187f&link_type=abstract
Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July
Astronomy and Astrophysics
Astronomy
Scientific paper
Evolutionary synthesis models for star clusters of various metallicities including gaseous emission during the lifetime of the ionising stars are used to model star cluster systems comprising two populations: an old metal-poor globular clusters (GC) population similar to that of the Milky Way halo and a second GC population of arbitrary metallicity. Under the simplifying assumptions that both GC populations have the same number of GCs the same intrinsic width of their color distribution and the same underlying mass function we calculate the time evolution of the color distributions and luminosity functions for the two GC populations in various bands (U...K). We show how the possibility to observationally disentangle two GC populations of various ages and metallicities depends on the passbands of the observations and provide predictions for the luminosity functions of both the red and blue GC subpopulations. Comparison with multi-passband observations of blue and red GC populations in elliptical galaxies and in particular of LFs determined separately for both subpopulations give clues to their relative ages and metallicities and help constrain their formation scenarios.
Alvensleben Uta Fritze--v.
Anders Peter
de Grijs Richard
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