TURBULENT PRESSURE EVOLUTION IN COLLAPSING PROTOSTELLAR CLOUDS
An influence of ambipolar diffusion on turbulent pressure (Pt) evolution in collapsing molecular cloud cores is investigated analytically. Exact solution for Alfven waves in free collapsing weakly ionized slab is found and then used to derive an equation for Pt. Taking ambipolar diffusion into account, we show that the pressure-density relation Pt() is non-power-law in general, and can be much softer than Pt ∝ 3/2.
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Document Type: Research Article
Affiliations: Chelyabinsk State University, Br. Kashirinykh 129, Chelyabinsk, 454021, Russia
Publication date: 2003-02-01