Non-ideal MHD shearing-box simulations with a new damping scheme yield power-law scalings for wind-driven accretion rates based on midplane plasma beta, ambipolar Elsasser number, and active layer thickness that match results within a factor of 2-3.
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New ALMA data at 50 au resolution of HH46/47 shows a rotating-infalling envelope to disk transition at 30 au around a 0.3 solar-mass protostar, with outflow shells expanding radially and supporting entrainment over disk-wind origin.
Nonlinear shock formation dominates angular momentum deposition from planet-induced density waves, cooling matches it for sub-thermal planets, and viscosity only matters at unrealistically high values.
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ALMA High-resolution Observation of the HH46/47 Outflow/disk/envelope System
New ALMA data at 50 au resolution of HH46/47 shows a rotating-infalling envelope to disk transition at 30 au around a 0.3 solar-mass protostar, with outflow shells expanding radially and supporting entrainment over disk-wind origin.