Frequency resolved radio and high-energy emission of pulsars

Abstract

Context. Pulsars are detected as broadband electromagnetic emitters from the radio wavelength up to high and very high energy in the MeV/GeV and sometimes even in the TeV range. Multi-wavelength phase-resolved spectra and light curves offer an unrivalled opportunity to understand their underlying radiation mechanisms and to localize their emission sites and therefore the particle acceleration regions. Aims. In this paper, we compute pulsars multi-wavelength phase-resolved light-curves and spectra assuming that curvature radiation operates from inside the magnetosphere of a rotating vacuum magnet. Radio emission arises from the polar caps whereas gamma-ray energy emanates from the slot gaps in the vicinity of the separatrix between closed and open field lines. Methods. By integrating particle trajectories within the slot gaps, we compute energy dependent photon sky maps in the radio band (MHz-GHz) and in the gamma-ray band (MeV/GeV) for mono-energetic distribution functions of leptons. Results. We obtained many details of the energy dependent light curves and phase-resolved spectra from the radio wavelength up to the gamma-ray energies. Choosing Lorentz factors of γ = 30 for radio emitting particles and γ = 10^7 for gamma-ray emitting particles, we found realistic spectra accounting for the wealth of multi-wavelength pulsar observations.

38 pages, 37 figures

References in corpus (9)

• Time-dependent pair cascades in magnetospheres of neutron stars I. Dynamics of the polar cap cascade with no particle supply from the neutron star surface
• High-Altitude Emission from Pulsar Slot Gaps: The Crab Pulsar
• Constraints on the Emission Geometries and Spin Evolution of Gamma-ray Millisecond Pulsars
• Outer-gap vs. Slot-gap Models for Pulsar High Energy Emissions: The Case of the Crab Pulsar
• Light-curve modelling constraints on the obliquities and aspect angles of the young Fermi pulsars
• Radio-to-TeV Phase-resolved Emission from the Crab Pulsar: The Annular Gap Model
• Testing dissipative magnetosphere model light curves and spectra with FERMI pulsars
• Gamma-ray Emission from the Vela Pulsar Modeled with the Annular Gap and Core Gap
• Magnetic Pair Creation Transparency in Gamma-Ray Pulsars

Cited by in corpus (4)

• Poynting flux transport channels formed in polar cap regions of neutron star magnetospheres
• Trajectories and Radiation of Charged Particles in the Pulsar Magnetosphere
• Origin of radio polarization in pulsar polar caps
• The Effect of Pulsar Geometry on the Observed Gamma-ray Spectrum of Millisecond Pulsars