An implementation of the microphysics in full general relativity: a general relativistic neutrino leakage scheme

  title={An implementation of the microphysics in full general relativity: a general relativistic neutrino leakage scheme},
  author={Yuichiro Sekiguchi},
  journal={Classical and Quantum Gravity},
Performing fully general relativistic simulations taking account of microphysical processes (e.g. weak interactions and neutrino cooling) is one of the long-standing problems in numerical relativity. One of main difficulties in implementation of weak interactions in the general relativistic framework lies in the fact that the characteristic timescale of weak interaction processes (the WP timescale, ) in hot dense matters is much shorter than the dynamical timescale (tdyn). Numerically this… 

Figures and Tables from this paper

Implementation of Monte Carlo Transport in the General Relativistic SpEC Code
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
Beyond second-order convergence in simulations of magnetized binary neutron stars with realistic microphysics
We investigate the impact of using high-order numerical methods to study the merger of magnetized neutron stars with finite-temperature microphysics and neutrino cooling in full general relativity.
Topics in Core-Collapse Supernova Theory: The Formation of Black Holes and the Transport of Neutrinos
Core-Collapse Supernovae are one of the most complex astrophysical systems in the universe. They deeply entwine aspects of physics and astrophysics that are rarely side by side in nature. To
Improved leakage-equilibration-absorption scheme (ileas) for neutrino physics in compact object mergers
We present a new, computationally efficient, energy-integrated approximation for neutrino effects in hot and dense astrophysical environments such as supernova cores and compact binary mergers and
Numerical relativity of compact binaries in the 21st century.
With the recent dramatic discoveries of gravitational waves from merging black holes by the Laser Interferometric Gravitational Wave Observatory and Virgo, and the subsequent discovery of both electromagnetic and gravitational wave signals from a merging neutron star-neutron star binary, numerical relativity became an indispensable tool for the new field of multimessenger astronomy.
MODA: a new algorithm to compute optical depths in multidimensional hydrodynamic simulations
Aims. We introduce the multidimensional optical depth algorithm (MODA) for the calculation of optical depths in approximate multidimensional radiative transport schemes, equally applicable to
We present the first numerical result of fully general relativistic axisymmetric simulations for the collapse of a rotating high-entropy stellar core to a black hole and an accretion disk. The
Collapse of rotating very massive stellar core to a black hole and a disk
Recent studies of modeling a progenitor of long gamma-ray bursts (LGRBs) suggest that progenitors of LGRBs might have a core with higher entropy than that of ordinary presupernove. Based on the above
Coalescence of Black Hole-Neutron Star Binaries
The current status of general relativistic studies for the coalescence of black hole-neutron star (BH-NS) binaries is reviewed and understanding for the merger and/or tidal disruption processes, the criterion for tidal disruption, and the properties of the remnant formed after the tidal disruption are summarized.
General relativistic simulations of compact binary mergers as engines for short gamma-ray bursts
Black hole - neutron star (BHNS) and neutron star - neutron star (NSNS) binaries are among the favored candidates for the progenitors of the black hole - disk systems that may be the engines powering


Supernova simulations with Boltzmann neutrino transport: a comparison of methods
Accurate neutrino transport has been built into spherically symmetric simulations of stellar core collapse and postbounce evolution. The results of such simulations agree that spherically symmetric
Stellar core collapse - Numerical model and infall epoch
A numerical model based on hydrodynamics coupled to radiation transport of all neutrino types is developed for calculating stellar core collapse. General relativistic hydrodynamic equations for
Radiation hydrodynamics with neutrinos - Variable Eddington factor method for core-collapse supernova simulations
Neutrino transport and neutrino interactions in dense matter play a crucial role in stellar core collapse, supernova explosions and neutron star formation. Here we present a detailed description of a
Relativistic simulations of rotational core collapse - II. Collapse dynamics and gravitational radiation
We have performed hydrodynamic simulations of relativistic rotational supernova core collapse in axisymmetry and have computed the gravitational radiation emitted by such an event. The Einstein
A Simple Parameterization of the Consequences of Deleptonization for Simulations of Stellar Core Collapse
A simple and computationally efficient parameterization of the deleptonization, the entropy changes, and the neutrino stress is presented for numerical simulations of stellar core collapse. The
A Finite Difference Representation of Neutrino Radiation Hydrodynamics in Spherically Symmetric General Relativistic Spacetime
We present an implicit finite difference representation for general relativistic radiation hydrodynamics in spherical symmetry. Our code, AGILE-BOLTZTRAN, solves the Boltzmann transport equation for
Effects of General Relativity on the Mass Ejection of Neutrino-Trapping Supernovae
(Received May 17, ~984) The effects of neutrino trapping and general relativity (GR) on the mass ejection of supernovae are investigated on the assumption of adiabatic collapse with the aid of an
A Generalized equation of state for hot, dense matter
Abstract An equation of state for hot, dense matter is presented in a form that is sufficiently rapid to use directly in hydrodynamical simulations, for example, in stellar collapse calculations. It
Theory of core-collapse supernovae
Advances in our understanding and the modeling of stellar core-collapse and supernova explosions over the past 15 years are reviewed, concentrating on the evolution of hydrodynamical simulations, the
We present two-dimensional hydrodynamic simulations of stellar core collapse and develop the framework for a detailed analysis of the energetic aspects of neutrino-powered supernova explosions. Our