Transport properties of degenerate electrons in neutron star envelopes and white dwarf cores

Abstract

New calculations of the thermal and electrical electron conductivities are performed for a broad range of physical parameters typical for envelopes of neutron stars and cores of white dwarfs. We consider stellar matter composed of astrophysically important chemical elements from H to Fe in the density range from 10^2-10^4 g/ccm up to 10^7-10^{10} g/ccm, where atoms are fully ionized and electrons are strongly degenerate. We have used modified ion structure factors suggested in physics/9811052. In the ion liquid, these modifications take into account, in an approximate way, instantaneous electron-band structures that reduce the electron-ion scattering rate. In crystallized matter, the new structure factors include multi-phonon processes important at temperatures not very much lower than the melting temperature T_m. The transport coefficients obtained differ significantly from those derived earlier in the important temperature range T_m/5 < T < 5 T_m. The results of our numerical calculations are fitted by analytical expressions convenient for astrophysical applications.

10 pages, 7 figures, LaTeX using aa.cls and epsf.sty. Corrected typos in Eq.(16) (v2) and in Eq.(A3) (v3)

Cited by in corpus (25)

• Physics of Neutron Star Crusts
• Magnetic field evolution in magnetar crusts through three dimensional simulations
• Nuclear Physics of the Outer Layers of Accreting Neutron Stars
• Dark matter ignition of type Ia supernovae
• Reaction rates and transport in neutron stars
• Supernovae Sparked By Dark Matter in White Dwarfs
• Electron thermal conductivity owing to collisions between degenerate electrons
• Accelerating Composite Dark Matter Discovery with Nuclear Recoils and the Migdal Effect
• The ion potential in warm dense matter: wake effects due to streaming degenerate electrons
• Energy loss and friction characteristics of electrons at warm dense matter and non-ideal dense plasma conditions
• Shear Viscosity and Oscillations of Neutron Star Crusts
• Nuclear Fusion Inside Dark Matter
• The structure of accreted neutron star crust
• Constraints on Relic Magnetic Black Holes
• White Dwarf Bounds on CHAMPs
• Coulomb Log for Conductivity of Dense Plasmas
• AE Aquarii represents a new subclass of Cataclysmic Variables
• Structure of Multicomponent Coulomb Crystals
• Electrostatic energy of Coulomb crystals with polarized electron background
• Shear viscosity of degenerate electron matter
• Non-Fermi liquid behavior of thermal relaxation time in degenerate electron plasma
• Recent Advances in Modeling Stellar Interiors
• Work Function of Strongly Magnetized Neutron Star Crustal Matter and the Associated Magneto-Sphere
• Estimation of transport coefficients of dense hadronic and quark matter
• Neutron star envelopes and thermal radiation from the magnetic surface