Radiation Pressure Feedback Dust absorbs the radiation produced by starbursts or AGN Dust collisionally coupled to the gas: mfp ~ 1 a 0.1 n 1 pc Starlight provides turbulent pressure support of ISM Momentum-driven wind: V ~ V c L/c M W V L ~ 10 -3 M * c 2 ~ M W V c M W ~ M * Efficient mechanism for blowing cold dusty gas out of a galaxy (i.e, couples to the phase of the ISM with most of the mass) · ····
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