Lunch talk on Apr. 11, 2022

The implications of TeV detected GRB afterglows for acceleration at relativistic shocks

Speaker: Zhiqiu Huang (MPIK)

Venue: Video Conference

Time: 12:30 PM, Monday, Apr. 11, 2022

Abstract: 

We revisit the external shock picture of gamma-ray burst afterglow models, in light of recent very-high-energy gamma-ray detection from GRB190829A. The maximum electron energy achievable at an ultra-relativistic weakly-magnetized shock is thought to proceed in the "ballistic" transport regime. This limits synchrotron photons to energies below the often assumed burn-off limit. A single zone synchrotron/SSC model if developed to compare the revised afterglow predictions against multi-wavelength data of GRB190829A. Reproducing the hard spectrum reported by H.E.S.S.collaboration within our simple single zone model is a serious challenge when Klein-Nishina effects are correctly accounted for.

Report PPT:  SWIFAR_Zhiqiu Huang.pdf