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With their highly energetic radiation, they heat up the surrounding gas and ionise it.  Moreover, at the end of his life, stars explode in supernovae, which create swirl in the gas around them.  But this gas is also the main material use to grow the next generation of stars. And a change in his state can have great consequence on the future generations.  To study of these intense period of change, induce by a complex coupling into different physics, numerical simulation are needed.I'm working with Emma, an AMR cosmological code with fully coupled radiative hydrodynamics, in which one I've implement a star formation recipe and different types of supernovae feedback.