Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344210s&link_type=abstract
American Astronomical Society, AAS Meeting #213, #442.10; Bulletin of the American Astronomical Society, Vol. 41, p.320
Astronomy and Astrophysics
Astronomy
Scientific paper
Evolution of the mass function (MF) and radial distribution (RD) of the globular cluster (GC) systems of the Milky Way and M87 are calculated using an advanced, realistic Fokker-Planck (FP) model that considers dynamical friction, disk/bulge shocks, and eccentric cluster orbits. We perform hundreds of FP calculations with different initial cluster conditions, and then search a wide parameter space for the best-fit initial GC MF and RD that evolves into the observed present-day GC MF and RD. By allowing both MF and RD of the initial GC system to vary, we find that in case of the Milky Way, our best-fit models have a higher peak mass for a log-normal initial MF and a higher cutoff mass for a powerlaw initial MF than previous estimates. We discuss the possibility of using the peak mass of the GCMF in a galaxy as a standard candle.
Kim Seongcheol
Shin Jihye
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