Multi-wavelength emission in resistive pulsar magnetospheres

Abstract

In this paper, we compute a full set of neutron star magnetosphere structures from the basic vacuum regime to the dissipation-less force-free regime by implementing a resistive prescription for the plasma. A comparison to the radiation reaction limit is also discussed. We investigated the impact of these resistive magnetospheres onto the multi-wavelength emission properties based on the polar cap model for radio wavelengths, on the slot gap model for X-rays and on the striped wind model for $\gamma$-rays.} % methods heading (mandatory) {We performed time-dependent pseudo-spectral simulations of the full Maxwell equations including a resistive Ohm's law. We deduced the polar cap shape and size, the Poynting flux, the magnetic field structure and the current sheet surface, depending on the magnetic obliquity~$\chi$ and on the conductivity~$\sigma$. We found that the geometry of the magnetosphere close to the stellar surface is not impacted by the amount of resistivity. Polar cap rims remain very similar in shape and size. However the Poynting flux varies significantly as well as the magnetic field sweep-back in the vicinity of the light-cylinder. This bending of field lines reflects into the $\gamma$-ray pulse profiles, changing the $\gamma$-ray peak separation~$\Delta$ as well as the time lag~$\delta$ between the radio pulse and $\gamma$-ray peaks. X-ray pulse profiles are also drastically affected by the resistivity. A full set of multi-wavelength light-curves can be compiled for future comparison with the third $\gamma$-ray pulsar catalogue. This systematic study will help to constrain the amount of magnetic energy flowing into particle kinetic energy and shared by radiation.

Accepted for publication in A&A

References in corpus (43)

• The ATNF Pulsar Catalogue
• Time-dependent force-free pulsar magnetospheres: axisymmetric and oblique rotators
• Modeling of Gamma-Ray Pulsar Light Curves with Force-Free Magnetic Field
• Resistive Solutions for Pulsar Magnetospheres
• An Atlas For Interpreting Gamma-Ray Pulsar Light Curves
• Ab-initio pulsar magnetosphere: three-dimensional particle-in-cell simulations of oblique pulsars
• Modeling high-energy pulsar lightcurves from first principles
• Particle acceleration in axisymmetric pulsar current sheets
• Electrodynamics of axisymmetric pulsar magnetosphere with electron-positron discharge: a numerical experiment
• The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Toward a Realistic Pulsar Magnetosphere
• Gamma-Ray Emission in Dissipative Pulsar Magnetospheres: From Theory to Fermi Observations
• The pulsar force-free magnetosphere linked to its striped wind: time-dependent pseudo-spectral simulations
• Electrodynamics of pulsar magnetospheres
• Pulsed radiation from neutron star winds
• Modeling magnetized neutron stars using resistive MHD
• Theory of pulsar magnetosphere and wind
• Multipolar electromagnetic fields around neutron stars: exact vacuum solutions and related properties
• An unified polar cap/striped wind model for pulsed radio and gamma-ray emission in pulsars
• Light-curve modelling constraints on the obliquities and aspect angles of the young Fermi pulsars
• Gamma-Ray Light Curves from Pulsar Magnetospheres with Finite Conductivity
• The pulsar synchrotron in 3D: curvature radiation
• Testing dissipative magnetosphere model light curves and spectra with FERMI pulsars
• Fermi Gamma-Ray Pulsars: Understanding the High-Energy Emission from Dissipative Magnetospheres
• Filling the Magnetospheres of Weak Pulsars
• Polarized synchrotron emission from the equatorial current sheet in gamma-ray pulsars
• Constraining gamma-ray pulsar gap models with a simulated pulsar population
• The illusion of neutron star magnetic field estimates
• Young and middle age pulsar light-curve morphology: Comparison of Fermi observations with gamma-ray and radio emission geometries
• The spectral simulations of axisymmetric force-free pulsar magnetosphere
• An oblique pulsar magnetosphere with a plasma conductivity
• General-relativistic electromagnetic fields around a slowly rotating neutron star: time-dependent pseudo-spectral simulations
• General-relativistic pulsar magnetospheric emission
• Probing the High-energy $\gamma$-ray Emission Mechanism in the Vela Pulsar via Phase-resolved Spectral and Energy-dependent Light Curve Modeling
• Modeling gamma-ray light curves with more realistic pulsar magnetospheres
• Radiative pulsar magnetospheres: oblique rotators
• Radiative pulsar magnetospheres: aligned rotator
• Three-dimensional dissipative pulsar magnetospheres with Aristotelian electrodynamics
• Hybrid Numerical Simulations of Pulsar Magnetospheres
• Pulsar Emission Physics: The First Fifty Years
• Exploring the energy-dependent radiation properties in dissipative magnetospheres with Fermi pulsars
• Global current circuit structure in a resistive pulsar magnetosphere model
• Localisation of the non-thermal X-ray emission of PSR~J2229+6114 from its multi-wavelength pulse profiles