event
Friday 24 Jul 2009: Shell-Like Structures in the ISM: Observation Versus Simulations
Vojtech Sidorin - Charles University in Prague
Physics, 4th Floor interaction area 12:00-13:00
The interstellar medium in galaxies is a turbulent environment with a plethora of holes, bubbles and shells. All these shell-like structures are thought to be closely related to the formation, evolution and death of stars. In most cases, they are likely created by the winds of OB stars and supernovae. The material collected along the borders of shells may fragment, become unstable under its own gravity and create a new generation of stars. This is a variant of triggered star formation referred to as the collect-and-collapse scenario. The aim of our research is to compare numerical simulations of shell-like structures to observations and to search for and investigate regions of triggered star formation in the Milky Way. I will briefly overview the current knowledge of shells, i.e. the observation of shells, the physical models describing them and numerical simulations of the expanding shells.
