TP-17

Hyper-Eddington Accretion and Collimated Outflow from Black Holes

Edison Liang (Rice University)

Many currently popular models of GRBs invoked transient accretion onto black holes at rates many orders of magnitudes above the Eddington rate (e.g. 0.01 - 1 Msun/sec). Even though neutrino loss will dominate the cooling, the photon radiation pressure on the leptons will still be enormous. Such hyper-Eddington accretion will likely lead to collimated outflows, especially if the matter is lepton-rich. Here we use 2-dimensional self-similar techniques to explore the parameter space of radiation-driven inflow-outflow solutions (RADIOS) and discuss their implications for GRBs.