Implementation of Monte Carlo Transport in the General Relativistic SpEC Code

  title={Implementation of Monte Carlo Transport in the General Relativistic SpEC Code},
  author={Francois Foucart and Matthew D Duez and François H{\'e}bert and Lawrence E. Kidder and Phillip Kovarik and Harald P. Pfeiffer and Mark A. Scheel},
  journal={The Astrophysical Journal},
Neutrino transport and neutrino−matter interactions are known to play an important role in the evolution of neutron star mergers and of their post-merger remnants. Neutrinos cool remnants, drive post-merger winds, and deposit energy in the low-density polar regions where relativistic jets may eventually form. Neutrinos also modify the composition of the ejected material, impacting the outcome of nucleosynthesis in merger outflows and the properties of the optical/infrared transients that they… 
Jet launching from binary neutron star mergers: Incorporating neutrino transport and magnetic fields
We perform general relativistic, magnetohydrodynamic (GRMHD) simulations of merging binary neutron stars incorporating neutrino transport and magnetic fields. Our new radiative transport module for
Thermal aspects of neutron star mergers
In order to extract maximal information from neutron-star merger signals, both gravitational and electromagnetic, we need to ensure that our theoretical models/numerical simulations faithfully
Incorporating a Radiative Hydrodynamics Scheme in the Numerical-Relativity Code BAM
To study binary neutron star systems and to interpret observational data such as gravitational-wave and kilonova signals, one needs an accurate description of the processes that take place during the
Thinking Outside the Box: Numerical Relativity with Particles
The observation of gravitational waves from compact objects has now become an active part of observational astronomy. For a sound interpretation, one needs to compare such observations against
Snowmass2021 Cosmic Frontier White Paper: Numerical relativity for next-generation gravitational-wave probes of fundamental physics
The next generation of gravitational-wave detectors, conceived to begin operations in the 2030s, will probe fundamental physics with exquisite sensitivity. These observations will measure the


Evaluating radiation transport errors in merger simulations using a Monte Carlo algorithm
Neutrino-matter interactions play an important role in the postmerger evolution of neutron star-neutron star and black hole-neutron star mergers. Most notably, they determine the properties of the
Monte-Carlo Neutrino Transport in Neutron Star Merger Simulations
Gravitational waves and electromagnetic signals from merging neutron star binaries provide valuable information about the the properties of dense matter, the formation of heavy elements, and
Monte Carlo Neutrino Transport Through Remnant Disks from Neutron Star Mergers
We present Sedonu, a new open source, steady-state, special relativistic Monte Carlo (MC) neutrino transport code, available at The code calculates the energy- and
High‐resolution calculations of merging neutron stars – II. Neutrino emission
The remnant resulting from the merger of two neutron stars produces neutrinos in copious amounts. In this paper we present the neutrino emission results obtained via Newtonian, high-resolution
Monte Carlo closure for moment-based transport schemes in general relativistic radiation hydrodynamic simulations
General relativistic radiation hydrodynamics simulations are necessary to accurately model a number of astrophysical systems involving black holes and neutron stars. Photon transport plays a crucial
Properties of Neutrino-driven Ejecta from the Remnant of a Binary Neutron Star Merger: Pure Radiation Hydrodynamics Case
We performed general relativistic, long-term, axisymmetric neutrino radiation hydrodynamics simulations for the remnant formed after a binary neutron star merger, which consists of a massive neutron
Properties of Neutrino Transfer in a Deformed Remnant of a Neutron Star Merger
We study properties of neutrino transfer in a remnant of a neutron star merger, consisting of a massive neutron star and a surrounding torus. We perform numerical simulations of the neutrino transfer
Post-merger evolution of a neutron star-black hole binary with neutrino transport
We present a first simulation of the post-merger evolution of a black hole-neutron star binary in full general relativity using an energy-integrated general-relativistic truncated moment formalism
We present an Advanced Spectral Leakage (ASL) scheme to model neutrinos in the context of core-collapse supernovae (CCSNe) and compact binary mergers. Based on previous gray leakage schemes, the ASL
Dynamical Mass Ejection from Binary Neutron Star Mergers
We present fully general-relativistic simulations of binary neutron star mergers with a temperature and composition dependent nuclear equation of state. We study the dynamical mass ejection from both