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Astron. Astrophys. 342, 655-664 (1999) AcknowledgementsWe are much indebted to Lars Hernquist for generously providing the TREESPH code. We also thank Frank Briggs and Thijs van der Hulst for their comments on a draft of this paper. We thank the referee, Dr. Friedli, for his extensive comments. The research of JPEG was supported by the Netherlands Foundation for Research in Astronomy (NFRA) with financial aid from the Netherlands Organization for Scientific Research (NWO). ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: February 23, 1999 ![]() |