AN OPEN-SOURCE NEUTRINO RADIATION HYDRODYNAMICS CODE FOR CORE-COLLAPSE SUPERNOVAE

By E. O’Connor. 2014

197 citations recorded by the source corpus.

We present an open-source update to the spherically symmetric, general-relativistic hydrodynamics, core-collapse supernova (CCSN) code GR1D. The source code is available at http://www.GR1Dcode.org. We extend its capabilities to include a general-relativistic treatment of neutrino transport based on the moment formalisms of Shibata et al. and Cardall et al. We pay special attention to implementing and testing numerical methods and approximations that lessen the computational demand of the transport scheme by removing the need to invert large matrices. This is especially important for the implementation and development of moment-like transport methods in two and three dimensions. A critical component of neutrino transport calculations is the neutrino–matter interaction coefficients that describe the production, absorption, scattering, and annihilation of neutrinos. In this article we also describe our open-source neutrino interaction library NuLib (available at http://www.nulib.org). We believe that an open-source approach to describing these interactions is one of the major steps needed to progress toward robust models of CCSNe and robust predictions of the neutrino signal. We show, via comparisons to full Boltzmann neutrino-transport simulations of CCSNe, that our neutrino transport code performs remarkably well. Furthermore, we show that the methods and approximations we employ to increase efficiency do not decrease the fidelity of our results. We also test the ability of our general-relativistic transport code to model failed CCSNe by evolving a 40-solar-mass progenitor to the onset of collapse to a black hole.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/10815e1ff3b9a8bb492f21dc7bf08e3d61cdc881

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In Nuclear and High Energy Physics

Citations in the corpus

Global comparison of core-collapse supernova simulations in spherical symmetry (2018, background): “Recently [16] have implemented both a general relativistic effective potential [21] and a twomoment, energy-dependent neutrino transport scheme into FLASH following closely the implementation of [55] (also see the code description for GR1D below).”
What can be learned from a future supernova neutrino detection (2017, result): “The results from this study have often been used by other authors to gauge the accuracy of their codes [206, 207, 208].”
The Gravitational Wave Signal from Core-collapse Supernovae (2018, methodology): “The transport of neutrinos is followed using an explicit Godunov characteristic method, with the HLLE approximate Riemann solver (Einfeldt 1988), modified as in Audit et al. (2002) and O’Connor (2015) to reduce the numerical dissipation in the diffusive limit.”