Dissertation
Evolution of black hole neutron star post-merger accretion disk in axisymmetry
Doctor of Philosophy (PhD), Washington State University
01/2020
Handle:
https://hdl.handle.net/2376/117512
Abstract
The remnant accretion disk from a black hole-neutron star binary merger can be responsible for electromagnetic counterparts to a gravitational wave signal. For example, a disk is needed for a short-duration gamma-ray burst, and disk winds can contribute to a kilonova. Numerical relativity simulations provide the only realistic post-merger initial state, but due to the cost of 3D simulations, these usually only cover the first tens of milliseconds. We report on our recent 2D black hole-neutron star post-merger disk simulations in axisymmetric relativistic hydrodynamics. We evolve the disk for a few hundred milliseconds from realistic initial data from 3D simulations. Our post-merger simulations employ an alpha viscosity model to account for angular momentum transport, and they include M1 neutrino transport for a more realistic evolution of the composition in the disk and its ejecta.
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Details
- Title
- Evolution of black hole neutron star post-merger accretion disk in axisymmetry
- Creators
- Milad Haddadi
- Contributors
- Matthew D. Duez (Advisor)Sukanta Bose (Committee Member)Philip L. Marston (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Physics and Astronomy, Department of
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Number of pages
- 132
- Identifiers
- 99900581808901842
- Language
- English
- Resource Type
- Dissertation