The Magellanic Stream System. I. Ram-Pressure Tails and the Relics of the Collision Between the Magellanic Clouds
F. Hammer et al 2015 ApJ 813 110
Analysis of the Magellanic Stream suggest it can be decomposed into two filaments representing ram-pressure tails. There is also further evidence that the Magellanic Clouds collided 200-300 Myr ago.