NuGrid: Toward high precision double-degenerate merger simulations with SPH in 3D

Steven Diehl, Center for Theoretical Astrophysics
Christopher L. Fryer, Los Alamos National Laboratory
Aimee Hungerford, Los Alamos National Laboratory
Gabriel Rockefeller, Los Alamos National Laboratory
Michael Bennet, Keele University
Falk Herwig, Keele University
Raphael Hirschi, Keele University
Marco Pignatari, Keele University
Georgios Magkotsios, University of Notre Dame
Francis X. Timmes, School of Earth and Space Exploration
Patrick Young, School of Earth and Space Exploration
Geoffrey C. Clayton, Louisiana State University
Patrick Motl, Louisiana State University
Joel E. Tohline, Louisiana State University


We present preliminary results from recent high-resolution double-degenerate merger simulations with the Smooth Particle Hydrodynamics (SPH) technique. We put particular emphasis on verification and validation in our effort and show the importance of details in the initial condition setup for the final outcome of the simulation. We also stress the dynamical importance of including shocks in the simulations. These results represent a first step toward a suite of simulations that will shed light on the question whether double-degenerate mergers are a viable path toward type 1a supernovae. In future simulations, we will make use of the capabilities of the NuGrid collaboration in post-processing SPH particle trajectories with a complete nuclear network to follow the detailed nuclear reactions during the dynamic merger phase. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlikeLicence.