IAU Symposium Abstract S186-086P

Formation of Gaseous Plumes in the Head-on Collisions of Galaxies

Korchagin1, T. Tsuchiya2 and K. Wada3
1 Institute of Physics, Stachki 194, Rostov-on-Don, Russia, vik@rsuss1.rnd.runnet.ru
2 Department of Astronomy, Faculty of Science, Kyoto University, Kyoto 606-01,Japan, tsuchiya@kusastro.kyoto-u.ac.jp
3 Center for Info. Proc. Edu., Hokkaido University, Sapporo 060, Japan, wada@hipecs.hokudai.ac.jp

Using N-body and SPH models we performed 3D numerical simulations of the head-on collisions between gas rich disk galaxies. In agreement with the previous studies we found that the collision of a disk galaxy with a purely stellar intruder does not produce gaseous plumes similar to those observed in the Cartwheel and VII Zw466 complexes of interacting galaxies. The gas component of the intruder galaxy is important for the formation of the broad gaseous plumes extended from the disk of a target galaxy. We determined the mass of gas blown out of the target galaxy depending on scenario of the collision and on the parameters of the intruder galaxy.