Neutrino opacities in magnetic fields for binary neutron star merger simulations

Abstract

Neutrino interactions play a central role in transport and flavor evolution in the ejecta of binary neutron star mergers. Simulations suggest that neutron star mergers may produce magnetic fields as strong as $10^{17}$ G, but computational difficulties have hampered the inclusion of magnetic field effects in neutrino interaction rates. In this paper we give approximate interaction rates for neutrinos in the presence of strong magnetic fields, including the effects of Landau quantization and anomalous magnetic moments with errors of order $\sqrt{T/M}$. We also comment on a neutrino production channel from individual neutrons that can produce low-energy $\nu \bar{\nu }$ pairs even at low density.

26 pages, 9 figures

References in corpus (17)

• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• Origin of the Heaviest Elements: the Rapid Neutron-Capture Process
• Producing ultra-strong magnetic fields in neutron star mergers
• Dynamical Mass Ejection from Binary Neutron Star Mergers
• Neutrino Opacities in Nuclear Matter
• Weak magnetism for antineutrinos in supernovae
• Efficient magnetic-field amplification due to the Kelvin-Helmholtz instability in binary neutron star mergers
• Neutrino Processes in Strong Magnetic Fields and Implications for Supernova Dynamics
• Direct URCA process in neutron stars with strong magnetic fields
• Rates of Neutrino Absorption on Nucleons and the Reverse Processes in Strong Magnetic Fields
• Kicks of magnetized strange quark stars induced by anisotropic emission of neutrinos
• A Relativistic Quantum Approach to Neutrino and Antineutrino Emissions via the Direct Urca Process in Strongly Magnetized Neutron-Star Matter
• Neutrino-pair emission in a strong magnetic field
• Effect of Magnetic Fields on Urca Rates in Neutron Star Mergers
• ν\barν -Pair Synchrotron Emission in Neutron-Star Matter based on a Relativistic Quantum Approach
• Effects of Landau quantization on neutrino emission and absorption
• Neutrino energy and momentum emission from magnetized dense quark matter