The velocity distribution of outflows driven by choked jets in stellar envelopes

Understand

Many stripped envelope supernovae (SNe) present a signature of high-velocity material responsible for broad absorption lines in the observed spectrum.

• These include SNe that are associated with long gamma-ray bursts (LGRBs) and low-luminosity GRBs (llGRBs), and SNe that are not associated with GRBs.
• Recently it was suggested that this high velocity material originates from a cocoon that is driven by a relativistic jet.
• In LGRBs this jet breaks out successfully from the stellar envelope, while in llGRBs and SNe that are not associated with GRBs the jet is choked.