Similar radiation mechanism in gamma-ray bursts and blazars: evidence from two luminosity correlations

Abstract

Active galactic nuclei (AGNs) and gamma-ray bursts (GRBs) are powerful astrophysical events with relativistic jets. In this Letter the broadband spectral properties are compared between GRBs and the well-observed blazars. The distribution of GRBs are consistent with the well-known blazar sequence including the $\nu L_{\nu }(5\mathrm{GHz})-{\alpha }_{\mathrm{RX}}$ and $\nu L_{\nu }(5\mathrm{GHz})-{\nu }_{\mathrm{peak}}$ correlations, where ${\alpha }_{\mathrm{RX}}$ is defined as the broadband spectral slope in radio-to-X-ray bands, and ${\nu }_{\mathrm{peak}}$ is defined as the spectral peak frequency. Moreover, GRBs occupy the low radio luminosity end of these sequences. These two correlations suggest that GRBs could have a similar radiation process with blazars both in the prompt emission and afterglow phases, i.e., synchrotron radiation.

arXiv comment12 pages, 2 figures, 1 table. Accepted for publication by ApJL

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Cited by in corpus (10)

• Gamma-ray Burst Cosmology
• A Tight $L_{\mathrm{p},\mathrm{iso}}-E_{\mathrm{p}}^{\prime }-{\Gamma }_0$ Correlation of Gamma-Ray Bursts
• A Comprehensive Power Spectral Density Analysis of Astronomical Time Series. II. The Swift/BAT Long Gamma-Ray Bursts
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• GRBs and fundamental physics
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