The influence of corotation on the high energy synchrotron emission in Crab-like pulsars

TL;DR

This paper investigates how corotation and relativistic effects influence high-energy synchrotron emission in Crab-like pulsars, revealing that relativistic rotation effects enable TeV photon production and link VHE radiation with low-frequency emissions.

Contribution

It introduces a model incorporating relativistic corotation effects into synchrotron emission processes, demonstrating their significant impact on VHE photon production in pulsar magnetospheres.

Findings

Relativistic effects of rotation enhance quasi-linear diffusion efficiency.

TeV photons can be produced via synchrotron mechanism near the light cylinder.

VHE radiation correlates with low-frequency emission in Crab-like pulsars.

Abstract

For Crab-like pulsars we consider the synchrotron mechanism influenced by relativistic effects of rotation to study the production of the very high energy (VHE) pulsed radiation. The process of quasi-linear diffusion (QLD) is applied to prevent the damping of the synchrotron emission due to extremely strong magnetic field. By examining the kinetic equation governing the QLD, apart from the synchrotron radiative force, we taken into account the the so-called reaction force, that is responsible for corotation and influences plasma processes in the nearby zone of the light cylinder (LC) surface. We have found that the relativistic effects of rotation significantly change efficiency of the quasi-linear diffusion. In particular, examining magnetospheric parameters typical for Crab-like pulsars, it has been shown that unlike the situation, where relativistic effects of rotation are not important, on the LC surface, the relativistic electrons via the synchrotron mechanism may produce photons even in the TeV domain. It is shown that the VHE radiation is strongly correlated with the relatively low frequency emission.