Observational signatures of stellar explosions driven by relativistic jets

ABSTRACT The role of relativistic jets in unbinding the stellar envelope during a supernova (SN) associated with gamma-ray burst (GRB) is unclear. To study that, we explore observational signatures explosions that are driven by jets. We focus on final velocity distribution outflow such and compare its imprints to SN/GRB data. find jet-driven produce an flat energy per logarithmic scale proper velocity. seems be universal as it independent jet progenitor properties explored. range for typical GRB parameters γβ ≈ 0.03–3, where γ Lorentz factor β dimensionless A seen also collimated choked highest decreases depth at which choked. Comparison observations SN/GRBs strongly disfavors sole explosion source these events. Instead, collapsing star deposit into two channels – quasi-spherical (or wide angle) channel narrowly one. former carries most responsible SN sub-relativistic ejecta while latter 0.01–0.1 total GRB. Intriguingly, same channels, similar ratio, were binary neutron merger GW170817, suggesting engines work both phenomena.