Tails of the unexpected: the interaction of an isothermal shell with a cloud

J. M. Pittard
2010 Monthly Notices of the Royal Astronomical Society: Letters  
A new mechanism for the formation of cometary tails behind dense clouds or globules is discussed. Numerical hydrodynamical models show that when a dense shell of swept-up matter overruns a cloud, material in the shell is focussed behind the cloud to form a tail. This mode of tail formation is completely distinct from other methods, which involve either the removal of material from the cloud, or shadowing from a strong, nearby source of ionization. This mechanism is relevant to the cometary
more » ... seen in planetary nebulae and to the interaction of superbubble shells with dense clouds.
doi:10.1111/j.1745-3933.2010.00988.x fatcat:74hn2qwo75c2tk376j4grn4xp4