Very High Energy gamma-rays from electron/positron Pair Halos

TL;DR

This paper investigates the formation and characteristics of giant electron-positron pair halos around high-energy extragalactic sources, focusing on how their radiation depends on source and background light properties.

Contribution

It provides a detailed analysis of the spectral and angular distributions of pair halos, considering various astrophysical parameters and background light effects.

Findings

Radiation spectra depend strongly on primary gamma-ray energy

Angular distribution varies with source redshift

Flux of extragalactic background light influences halo brightness

Abstract

In this paper we study the formation of giant electrons-positron pair halos around the powerful high energy extragalactic sources. We investigate the dependence of radiation of pair halos, in particular the spectral and angular distributions on the energy spectrum of the primary gamma-rays, the redshift of the source, and the flux of the extragalactic background light.