Proton acceleration in pulsar magnetospheres

  title={Proton acceleration in pulsar magnetospheres},
  author={Claire Gu{\'e}pin and Ben{\^o}ıt Cerutti and Kumiko Kotera},
  journal={arXiv: High Energy Astrophysical Phenomena},
Pulsars have been identified as good candidates for the acceleration of cosmic rays, up to ultra-high energies. However, a precise description of the acceleration processes at play is still to be established. Using 2D particle-in-cell simulations, we study proton acceleration in axisymmetric pulsar magnetospheres. Protons and electrons are extracted from the neutron star surface by the strong electric field induced by the rotation of the star, and electrons and positrons are produced in the… Expand
The cosmic ray-driven streaming instability in astrophysical and space plasmas
Energetic non-thermal particles, or cosmic rays, are a major component of astrophysical plasmas next to magnetic fields, radiation, and thermal gas. Cosmic rays are usually sub-dominant in densityExpand
Modelling the broadest spectral band of the Crab nebula and constraining the ion acceleration efficiency
Although it is widely accepted that the electromagnetic spectrum from radio to very-high-energy $\gamma$-rays of pulsar wind nebulae (PWNe) originates from leptons, there is still an open questionExpand
Peta–electron volt gamma-ray emission from the Crab Nebula
Observations of the Crab Nebula at peta–electron volt energies constrains the gamma-ray emission mechanism and reports the detection of gamma rays from this source with a spectrum showing gradual steepening over three energy decades. Expand
X-Ray Emission from the PeVatron-candidate Supernova Remnant G106.3+2.7
We report the discovery of diffuse X-ray emission around the supernova remnant (SNR) G106.3+2.7, which is associated with VER J2227+608 and HAWC J2227+610 and is known as a candidate for a PeVExpand
Cherenkov Telescope Array sensitivity to the putative millisecond pulsar population responsible for the Galactic Centre excess
The leading explanation of theFermiGalactic center γ-ray excess is the extended emission from a unresolved population ofmillisecond pulsars (MSPs) in the Galactic bulge. Such a population would,Expand
The Hunt for Pevatrons: The Case of Supernova Remnants
The search for Galactic pevatrons is now a well-identified key science project of all instruments operating in the very-high-energy domain. Indeed, in this energy range, the detection of gamma raysExpand
Particle acceleration in neutron star ultra-strong electromagnetic fields
In this paper, we discuss the results of a new particle pusher in realistic ultra-strong electromagnetic fields as those encountered around rotating neutron stars. After presenting results of thisExpand


Ab-Initio Pulsar Magnetosphere: Particle acceleration in Oblique Rotators and High-energy Emission Modeling
We perform global particle-in-cell simulations of pulsar magnetospheres including pair production, ion extraction from the surface, frame dragging corrections, and high energy photon emission andExpand
Pair cascades in the magnetospheres of strongly magnetized neutron stars
We present numerical simulations of electron-positron pair cascades in the magnetospheres of magnetic neutron stars for a wide range of surface fields (Bp = 10 12 – 10 15 G), rotation periods (0.1–10Expand
We present "first-principles" relativistic particle-in-cell simulations of the oblique pulsar magnetosphere with pair formation. The magnetosphere starts to form with particles extracted from theExpand
Magnetars in the Metagalaxy: An Origin for Ultra-High-Energy Cosmic Rays in the Nearby Universe
I show that the relativistic winds of newly born magnetars (neutron stars with petagauss surface magnetic fields) with initial spin rates close to the centrifugal breakup limit, occurring in allExpand
Newly-born Pulsars as Sources of Ultrahigh Energy Cosmic Rays
Newly-born pulsars offer favorable sites for the injection of heavy nuclei, and for their further acceleration to ultrahigh energies. Once accelerated in the pulsar wind, nuclei have to escape fromExpand
Electrodynamics of Axisymmetric Pulsar Magnetosphere with Electron-Positron Discharge: A Numerical Experiment
We present the first self-consistent global simulations of pulsar magnetospheres with operating e ± discharge. We focus on the simple configuration of an aligned or anti-aligned rotator. The star isExpand
Particle acceleration in axisymmetric pulsar current sheets
The equatorial current sheet in pulsar magnetospheres is often regarded as an ideal site for particle acceleration via relativistic reconnection. Using 2D spherical particle-in-cell simulations, weExpand
Electron positron pair flow and current composition in the pulsar magnetosphere.
We performed ab-initio Particle-In-Cell (PIC) simulations of a pulsar magnetosphere with electron-positron plasma produced only in the regions close to the neutron star surface. We study how theExpand
Theory of pulsar magnetosphere and wind
  • J. P'etri
  • Physics
  • Journal of Plasma Physics
  • 2016
Neutron stars are fascinating astrophysical objects immersed in strong gravitational and electromagnetic fields, at the edge of our current theories. These stars manifest themselves mostly asExpand
Current flow and pair creation at low altitude in rotation-powered pulsars’ force-free magnetospheres: space charge limited flow
We report the results of an investigation of particle acceleration and electron-positron plasma generation at low altitude in the polar magnetic flux tubes of rotation-powered pulsars, when theExpand