Physikalisches Kolloquium des Instituts f. Physik
Kolloquiumsreihe ``From Stars to Galaxies''
Prof. Dr. Pavel Kroupa, Universitaet Bonn Title: ``Star clusters as the fundamental building blocks of galaxies Time: Nov 14, 2007, 5.15 p.m. Location: Campus Golm, Building 27, Lecture hall Abstract: Recent surveys of star forming regions show that virtually all stars form in very compact star clusters, spanning from small groups of a dozen stars to major entities amounting to a million stars or more. Understanding the early physical processes in these objects is at the forefront of current astrophysical research. Recent work has demonstrated that the expulsion of gas from the very young star clusters leads to the clusters expanding super-virially. Massive clusters may thus ``pop'' once the gas is gone, and thereby change the morphology of an entire galaxy as their stars are dispersed.