Young massive star clusters as probes for stellar evolution, cluster dynamics and long term survival [Elektronische Ressource] / put forward by Boyke Rochau

Dissertationsubmitted to theCombined Faculties of the Natural Science and Mathematicsof the Ruperto-Carola-University of Heidelberg. Germanyfor the degree ofDoctor of Natural SciencesPut forward byBoyke Rochauborn in: BremenOral examination: May 10th, 2011Young massive star clusters as probes for stellarevolution, cluster dynamics and long termsurvivalReferees:Prof. Dr. Thomas HenningProf. Dr. Ralf KlessenAbstractIn this dissertation I present an astrometric and photometric study of three youngand massive star clusters in the Milky Way to describe their structure, dynamics andkinematics. I conduct the first astrometric study of a Galactic starburst cluster withHST-WFPC2. I derived an age of 1Myr of NGC3603YoungCluster and a distance of6.75kpc. Thevelocity dispersionisfoundtobe4:750:8km/swithsimilarvelocities atdifferentmasseshintatanon-virialized cluster. Comparisonofthedynamicalandpho-tometric mass suggests a high star formation efficiency and dynamical timescales showthat the cluster dissolves into the Galactic field in a few Gyr. VLT-MAD observations0˙of Trumpler14 reveal a homogeneous AO corrected PSF over the 2 field-of-view. Thephotometric analysis proves the recency of the major star forming event in the clusterabout 1Myr ago. Its mass function turns over at0:5M , consistent with a Kroupa-IMF and shows a not segregated among the intermediate mass stars.