Ionization front-driven turbulence in the clumpy interstellar medium

Details Ionization front-driven turbulence in the clumpy interstellar medium Ionization front-driven turbulence in the clumpy interstellar medium

2008-08-20

arxiv.org/abs/0808.2744v1

Phys. Scr. T132 (2008) 014026

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1088/0031-8949/2008/T132/0140

We present 3D radiation-gasdynamical simulations of an ionization front running into a dense clump. In our setup, a B0 star irradiates an overdensity which is at a distance of 10 pc and modelled as a supercritical 100 M_sol Bonnor-Ebert sphere. The radiation from the star heats up the gas and creates a shock front that expands into the interstellar medium. The shock compresses the clump material while the ionizing radiation heats it up. The outcome of this "cloud-crushing" process is a fully turbulent gas in the wake of the clump. In the end, the clump entirely dissolves. We propose that this mechanism is very efficient in creating short-living supersonic turbulence in the vicinity of massive stars.

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