A Universal Energy Relation between synchrotron and Synchrotron Self-Compton radiation in GRBs and Blazars

TL;DR

This study reveals a universal energy relation linking synchrotron and SSC radiation in GRBs and blazars, suggesting similar underlying emission mechanisms, based on multiwavelength spectral analysis.

Contribution

It introduces a unified framework connecting GRB and blazar radiation properties through a tight correlation between synchrotron and SSC luminosities.

Findings

Strong correlation between synchrotron and SSC luminosities in blazars and GRBs.

Blazars and GRBs likely share similar radiation mechanisms.

Ground-based observations can further validate the universal energy relation.

Abstract

The recent and brightest GRB 221009A observed by LHAASO marked the first detection of the onset of TeV afterglow, with a total of 7 GRBs exhibiting very high energy (VHE) afterglow radiation. However, consensus on VHE radiation of GRBs is still lacking. Multi-wavelength studies are currently a primary research method for investigating high-energy $\gamma$-ray astronomy. The limited sample of VHE GRBs, combined with their transient nature, hinders the progress of physical studies of GRBs. This paper aims to obtain useful information for GRB research through the properties of blazars, which share significant similarities with GRBs. By fitting high-quality and simultaneous multiwavelength spectral energy distributions with a one-zone leptonic model, the study explores the similarity of radiation properties of blazars and GRBs. A tight correlation between synchrotron and synchrotron self-Compton (SSC) emission luminosities suggests that blazars and GRBs share similar radiation mechanisms, to be specific, synchrotron radiation produces the observed X-ray photons, which also serve as targets for electrons in the SSC process. We hope that ground-based experiments can observe more GRBs in sub-TeV to confirm these findings.