Pair creation from radial electromagnetic perturbation of a compact astrophysical object

Abstract

Recently Usov's mechanism of pair creation on the surface of compact astrophysical objects has been revisited [1] with a conclusion that the pair creation rate was previously underestimated in the literature by nearly two orders of magnitude. Here we consider an alternative hypothesis of pair creation due to a perturbation of the surface of a compact object. Radial perturbation is induced in hydrodynamic velocity resulting in a microscopic displacement of the negatively charged component with respect to the positively charged one. The result depends on the ratio between the spatial scale of the perturbation $\lambda$ and the mean free path $l$. When $\lambda \sim l$ the perturbation energy is converted into a burst of electron-positron pairs which are created in collisionless plasma oscillations at the surface; after energy excess is dissipated electrosphere returns to its electrostatic configuration. When instead $\lambda \gg l$, the perturbation is thermalized, its energy is transformed into heat, and pairs are created continuously by the heated electrosphere. We discuss the relevant astrophysical scenarios.

Submitted to PRD

References in corpus (34)

• Electron-positron pairs in physics and astrophysics: from heavy nuclei to black holes
• Positron annihilation spectrum from the Galactic Center region observed by SPI/INTEGRAL
• Bare Quark Matter Surfaces of Strange Stars and $e^{+}{e}^{-}$ Emission
• Thermal Evolution and Light Curves of Young Bare Strange Stars
• Thermal emission from bare quark matter surfaces of hot strange stars
• Neutron star equilibrium configurations within a fully relativistic theory with strong, weak, electromagnetic, and gravitational interactions
• Repeating Fast Radio Bursts from Collapses of the Crust of a Strange Star
• Thermalization of a nonequilibrium electron-positron-photon plasma
• Structure of the electrospheres of bare strange stars
• On the relativistic Thomas-Fermi treatment of compressed atoms and compressed nuclear matter cores of stellar dimensions
• The self-consistent general relativistic solution for a system of degenerate neutrons, protons and electrons in beta-equilibrium
• Strange Star Heating Events as a Model for Giant Flares of Soft Gamma-ray Repeaters
• Surface photon emissivity of bare strange stars
• Properties of Bare Strange Stars Associated with Surface Electric Fields
• Structure of pair winds from compact objects with application to emission from hot bare strange stars
• Nature and Nurture: a model for soft gamma-ray repeaters
• Thermalization of the mildly relativistic plasma
• The equation of state and radial oscillations of neutron stars
• Electron and positron pair production of compact stars
• Surface tension of the core-crust interface of neutron stars with global charge neutrality
• Radial oscillations of quark stars from perturbative QCD
• Electron-positron pair oscillation in spatially inhomogeneous electric fields and radiation
• Radiation from hot bare strange stars
• Electron-positron pair production in the electrosphere of quark stars
• Response of bare strange stars to energy input onto their surfaces
• Recent progresses in strange quark stars
• Phase space evolution of pairs created in strong electric fields
• Pauli blocking effects on pair creation in strong electric field
• Fully general relativistic simulations of rapidly rotating quark stars: Oscillation modes and universal relations
• Pair winds in Schwarzschild space-time with application to hot bare strange stars
• Strange quark matter as dark matter: 40 years later, a reappraisal
• Effect of electric field of the electrosphere on photon emission from quark stars
• Pair creation in hot electrosphere of compact astrophysical objects
• Oscillating Strange Quark Matter Objects Excited in Stellar Systems