Two-component jet model for the afterglow emission of GRB 201216C and GRB 221009A and implications for jet structure of very-high-energy gamma-ray bursts
arXiv:2502.19051 · doi:10.1016/j.jheap.2025.100415
Abstract
In recent years, afterglow emission in the very-high-energy (VHE) band above 100 GeV has been clearly detected for at least five gamma-ray bursts (GRBs 180720B, 190114C, 190829A, 201216C and 221009A). For some of these VHE GRBs, we previously proposed a two-component jet model, consisting of two uniform jets with narrow and wide opening angles to explain their multiwavelength afterglows including VHE gamma rays. In this paper, we show that the VHE spectra and light curves of GRBs 201216C and 221009A can also be reasonably explained by our two-component jet model, based on two top-hat jets propagating into a constant-density circumburst medium. We find that for the five VHE GRBs, the collimation-corrected kinetic energies of the narrow and wide jets have typical values of 5*10^{49} erg and 5*10^{50} erg, respectively. We discuss the similarities and differences among the VHE GRBs, and the implications for the structure of their jets. In agreement with previous studies, the narrow jet of GRB 221009A has an atypically small opening angle, so that its intrinsic, collimation-corrected energy remains within a plausible range despite the unusually large isotropic-equivalent energy.
12 pages, 5 figures, 1 table, JHEAp, in press
References in corpus (37)
- An online repository of Swift/XRT light curves of GRBs
- Teraelectronvolt emission from the -ray burst GRB 190114C
- A very-high-energy component deep in the Gamma-ray Burst afterglow
- Observation of inverse Compton emission from a long -ray burst
- Klein-Nishina Effects on Optically Thin Synchrotron and Synchrotron Self-Compton Spectrum
- A tera-electronvolt afterglow from a narrow jet in an extremely bright gamma-ray burst 221009A
- The Dynamics and Afterglow Radiation of Gamma-Ray Bursts. I. Constant Density Medium
- Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
- GRB 221009A, The BOAT
- Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow
- Properties of the extremely energetic GRB~221009A from Konus-WIND and SRG/ART-XC observations
- Very high energy gamma-ray emission beyond 10 TeV from GRB 221009A
- GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst
- Afterglow Lightcurves from Misaligned Structured Jets
- The Onset of Gamma-Ray Burst Afterglow
- The Radio to GeV Afterglow of GRB 221009A
- On the Implications of Late Internal Dissipation for Shallow-Decay Afterglow Emission and Associated High-Energy Gamma-Ray Signals
- GRB 221009A Afterglow from a Shallow Angular Structured Jet
- Two-component jet model for multiwavelength afterglow emission of the extremely energetic burst GRB 221009A
- Gamma-ray bursts afterglow physics and the VHE domain
- Multi-wavelength view of the close-by GRB 190829A sheds light on gamma-ray burst physics
- The optical light curve of GRB 221009A: the afterglow and the emerging supernova
- Statistical study of gamma-ray bursts with jet break feature in multi-wavelength afterglow emissions
- H.E.S.S. follow-up observations of GRB221009A
- AGILE gamma-ray detection of the exceptional GRB 221009A
- MAGIC detection of GRB 201216C at
- A Narrow Uniform Core with a Wide Structured Wing: Modeling the TeV and Multi-wavelength Afterglows of GRB 221009A
- Three-dimensional numerical simulations of structured GRB jets
- Synchrotron Self-Compton Emission in the Two-Component Jet Model for Gamma-Ray Bursts
- Analytic Modeling of Synchrotron-Self-Compton Spectra: Application to GRB 190114C
- Prompt emission and early optical afterglow of VHE detected GRB 201015A and GRB 201216C: onset of the external forward shock
- Radio Loud vs. Radio Quiet Gamma-ray Bursts: the Role of Binary Progenitors
- The origin of very-high-energy gamma-rays from GRB 221009A: implications for reverse shock proton synchrotron emission
- Towards an understanding of long gamma-ray burst environments through circumstellar medium population synthesis predictions
- Ionization-Gasdynamic Simulations of Wind-Blown Nebulae around Massive Stars
- A structured jet explains the extreme GRB 221009A
- Radio-bright vs. Radio-dark Gamma-ray Bursts -- More Evidence for Distinct Progenitors