Multiband Emission from Pulsar Wind Nebulae: A Possible Injection Spectrum

TL;DR

This paper models the multiwavelength emission from pulsar wind nebulae using a new particle spectrum, providing evidence that particles accelerated at the termination shock follow a relativistic Maxwellian plus high-energy tail spectrum.

Contribution

It introduces a novel particle injection spectrum for PWNe and demonstrates its effectiveness in reproducing observed multiwavelength emissions in three supernova remnants.

Findings

The new spectrum successfully fits observed emissions from three PWNe.

Model confirms particles are accelerated with a relativistic Maxwellian plus high-energy tail.

Self-consistent dynamical and radiative evolution of PWNe in SNRs is achieved.

Abstract

A recent research shows that particles with a spectrum of a relativistic Maxwellian plus a high-energy tail can be accelerated by relativistic collisionless shocks. We investigate the possibility of the high-energy particles with this new spectrum injected in pulsar wind nebulae (PWNe) from the terminate shock based on the study of multiwavelength emission from PWNe.} {The dynamics of a supernova remnant (SNR) and multiband nonthermal emission from the PWN inside the remnant are investigated using a dynamical model with electrons/positrons injected with the new spectrum. In this model, the dynamical and radiative evolution of a pulsar wind nebula in a non-radiative supernova remnant can be self-consistently described.} {This model is applied to the three composite SNRs, G0.9+0.1, MSH 15-52, G338.3-0.0, and the multiband observed emission from the three PWNe can be well reproduced.} {Our studies on the three remnant provide evidence for the new spectrum of the particles, which are accelerated by the terminate shock, injected into a PWN.