2023
DOI: 10.3847/1538-4357/acc57d
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The Possibility of Modeling the Very High Energy Afterglow of GRB 221009A in a Wind Environment

Abstract: In this paper, we model the dynamics and radiation physics of the rarity event GRB 221009A afterglow in detail. By introducing a top-hat jet that propagates in an environment dominated by stellar winds, we explain the publicly available observations of afterglow associated with GRB 221009A over the first week. It is predicted that GRB 221009A emits a luminous very high energy afterglow based on the synchrotron self-Compton (SSC) process in our model. We show the broadband spectral energy distribution (SED) ana… Show more

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Cited by 27 publications
(19 citation statements)
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“…Most interestingly, the Large High Altitude Air Shower Observatory (LHAASO) reported more than 5000 very-high-energy photons within the first ∼2000 s after the burst trigger with energies above 500 GeV all the way to 18 TeV, making them the most energetic photons ever observed from a GRB (Huang et al 2022). Various physical models and radiation mechanisms have been proposed to explain the observed 18 TeV photon (Baktash et al 2022;Brdar & Li 2023;Carenza & Marsh 2022;Finke & Razzaque 2023;Galanti et al 2022;González et al 2023;Li & Ma 2023;Ren et al 2023;Sahu et al 2023;Smirnov & Trautner 2022;Troitsky 2022;Xia et al 2022;Zhang et al 2023;Zhao et al 2023;Zheng et al 2023).…”
Section: Introductionmentioning
confidence: 99%
“…Most interestingly, the Large High Altitude Air Shower Observatory (LHAASO) reported more than 5000 very-high-energy photons within the first ∼2000 s after the burst trigger with energies above 500 GeV all the way to 18 TeV, making them the most energetic photons ever observed from a GRB (Huang et al 2022). Various physical models and radiation mechanisms have been proposed to explain the observed 18 TeV photon (Baktash et al 2022;Brdar & Li 2023;Carenza & Marsh 2022;Finke & Razzaque 2023;Galanti et al 2022;González et al 2023;Li & Ma 2023;Ren et al 2023;Sahu et al 2023;Smirnov & Trautner 2022;Troitsky 2022;Xia et al 2022;Zhang et al 2023;Zhao et al 2023;Zheng et al 2023).…”
Section: Introductionmentioning
confidence: 99%
“…We attribute the afterglows to the emission from synchrotron plus SSC process of the electrons accelerated by the external shocks. The radiation physics and dynamics of the external shock fireball models please refer to Mészáros & Rees (1997), Sari et al (1998), Dermer et al (2000, Huang et al (2000), Sari & Esin (2001), Zhang & Mészáros (2001), Wang et al (2001), Fan & Piran (2006), and Ren et al (2020Ren et al ( , 2023. We outline our calculations as follows.…”
Section: Modelmentioning
confidence: 99%
“…Wang et al 2019). Therefore, GRB 201216C should be intrinsically an ultrabright event, being similar to GRB 221009A (e.g., Ren et al 2023;O'Connor et al 2023). Its jet should be extremely narrow regarding the energetic crisis of the GRB phenomenon (e.g., Racusin et al 2008).…”
Section: Diversity Of Grbs With Detection Of Vhe Gamma-ray Afterglowsmentioning
confidence: 99%
“…We performed further analysis on the GBM data by using HEtools (see Appendix A). Before this tool was named, we had already applied it in some GRB data analyses (e.g., Ren et al 2023;Wang et al 2022;Jin et al 2023). The Fermi-GBM (Meegan et al 2009) payload has two types of detectors, including the 12 sodium iodide (NaI) detectors and 2 bismuth germanate (BGO) detectors.…”
Section: Observation and Data Analysismentioning
confidence: 99%
“…The corresponding light-curve and energy spectrum can be generated through online data retrieval, the preset spectrum inference or timeseries analysis can be performed, and finally, a briefing is generated and sent to the user's mailbox. Based on friendly expansion capabilities, by combining with A Standard Gammaray burst Afterglow Radiation Diagnoser (ASGARD; Ren et al 2023), it is used to model afterglow light curve and spectrum by considering various situations, various environments, and various physical processes. It is possible to constrain the microscopic physical parameters of GRBs by using a sampling method (e.g., MCMC, Nested, etc.)…”
Section: Appendix a Hetoolsmentioning
confidence: 99%