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From a star cluster ensemble to its formation history

Published online by Cambridge University Press:  31 March 2017

Christine Schulz  and
Michael Hilker
Christine Schulz
Affiliation:
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany email: cschulz@eso.org, mhilker@eso.org
Michael Hilker
Affiliation:
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany email: cschulz@eso.org, mhilker@eso.org
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Abstract

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The present-day sample of ultra-compact dwarf galaxies (UCDs) and globular clusters (GCs) around NGC 1399 is interpreted to be composed of individual star cluster (SC) populations. It is assumed that such an SC population forms at a constant star-formation rate (SFR), and its mass distribution is described by the embedded cluster mass function (ECMF) up to the upper limit Mmax. The GCs and UCDs probably formed in interactions of the progenitor galaxies during the assembly of the central Fornax galaxy cluster which is why we use them as tracers of those events. After some corrections, the overall GC/UCD mass function is decomposed into separate SC populations, each described by an ECMF. Mmax of each ECMF is converted to an SFR according to the SFR-Mmax relation, revealing the SFRs reached during the assembly of galaxies in the central Fornax galaxy cluster.

Keywords

galaxies: clusters: individual (NGC 1399)galaxies: star clustersglobular clusters: generalmethods: analytical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 263 - 264
Copyright
Copyright © International Astronomical Union 2017 

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