Work

Neutrino‐dominated Accretion and Supernovae

Year: 2005

Type: article

Abstract: We suggest that part of the infalling material during the core collapse of a massive star goes into orbit around the compact core to form a hot, dense, centrifugally supported accretion disk whose evolution is strongly influenced by neutrino interactions. Under a wide range of conditions, this neutrino-dominated accretion flow will be advection dominated and will develop a substantial outflowing wind. We estimate the energy carried out in the wind and find that it exceeds 10 50 ergs for a wide range of parameters and even exceeds 10 51 ergs for reasonable parameter choices. We propose that the wind energy will revive a stalled shock and will help produce a successful supernova explosion. We discuss the role of the disk wind in both prompt and delayed explosions. While both scenarios are feasible, we suggest that a delayed explosion is more likely and perhaps even unavoidable. Finally, we suggest that the disk wind may be a natural site for r -process nucleosynthesis.

Source: The Astrophysical Journal

DOI: 10.1086/431354

Authors: Kazunori Kohri, Ramesh Narayan, Tsvi Piran

Institutions: Center for Astrophysics Harvard & Smithsonian, The University of Osaka, California Institute of Technology, Hebrew University of Jerusalem

Language: English

Topic: Gamma-ray bursts and supernovae

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, National Aeronautics and Space Administration, Japan Society for the Promotion of Science

Award: Theoretical Investigations of Hydrodynamic and Magnetohydrodynamic Flows