SPH simulations of star/planet formation triggered by cloud-cloud   collisions
  We present results of hydrodynamic simulations of star formation triggered by cloud-cloud collisions. During the early stages of star formation, low-mass objects form by gravitational instabilities in protostellar discs. A number of these low-mass objects are in the sub-stellar mass range, including a few objects of planetary mass. The disc instabilities that lead to the formation of low-mass objects in our simulations are the product of disc-disc interactions and/or interactions between the discs and their surrounding gas. 
Spyridon Kitsionas (AIP, Potsdam, Germany), Anthony P. Whitworth   (School of Physics & Astronomy, Cardiff University, U.K.)...