Young star clusters in interacting galaxies – NGC 1487 and NGC 4038/4039 S. Mengel, M. D. Lehnert, N. A. Thatte, W. D. Vacca, B. Whitmore and R. Chandar A&A, 489 3 (2008) 1091-1105 Published online: 09 July 2008 DOI: 10.1051/0004-6361:200809649