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Runaway of Line-driven Winds toward Critical and Overloaded Solutions
Line-driven winds from hot stars and accretion disks are thought to adopt a unique, critical solution which corresponds to maximum mass loss rate and a particular velocity law. We show that in the presence of negative velocity gradients, radiative-acoustic (Abbott) waves can drive shallow wind solutions towards larger velocities and mass loss rates. Perturbations introduced downstream from the wind critical point lead to convergence towards the critical solution. By contrast, low-lyingdoi:10.1086/312577 pmid:10715240 fatcat:qcfwsiw7j5b5tf7qio5456f4vu