Three-dimensional numerical simulations of structured gamma-ray burst jets

• DOI: 10.1093/mnras/stac3401
• Publication Date: 2022-11-21T22:00:34Z
• Authors: Gerardo Urrutia; Fabio De Colle; Diego López-Cámara
• Keywords: Collimated light; Astrophysical jet

After the detection of GRB 170817A, first unambiguous off-axis gamma-ray burst (GRB), several studies tried to understand structure jets. The initial jet (directly produced by central engine) can be partially preserved, or completely modified interaction with environment. In this study, we perform three-dimensional, special relativistic hydrodynamics simulations long jets evolving through a massive progenitor star. Different scenarios were considered: Top-hat, Gaussian dominated pressure kinetic energy, as well model supernova (SN) plus both propagating progenitor. We found that, while inside star, different structures are nearly indistinguishable. Kinetic faster and more collimated than dynamics star strongly depends on presence an associated SN, which substantially decelerate propagation. show that is not, mainly depending collimation. preserved in uncollimated jets, i.e. move low density environments. Meanwhile, dense environments shaped medium remain collimated.