A smooth particle hydrodynamics code to model collisions between solid, self-gravitating objects C. Schäfer, S. Riecker, T. I. Maindl, R. Speith, S. Scherrer and W. Kley A&A, 590 (2016) A19 Published online: 29 April 2016 DOI: 10.1051/0004-6361/201528060