Double explosions and jet formation in GRB-supernova progenitors

Abstract

Progenitors of long GRBs, and core-collapse supernovae in general, may have two separate mechanisms driving the outflows: quasi-isotropic neutrino-driven supernova explosions followed by a highly collimated relativistic outflow driven by the GRB central engine, a black hole or a magnetar. We consider the dynamics of the second GRB-driven explosion propagating through expanding envelope generated by the passage of the primary supernova shock. Beyond the central core, in the region of steep density gradient created by the SN shock breakout, the accelerating secondary quasi-spherical GRB shock become unstable to corrugation and under certain conditions may form a highly collimated jet, a "chimney", when a flow expands almost exclusively along a nearly cylindrically collimated channel. Thus, weakly non-spherical driving and/or non-spherical initial conditions of the wind cavity may produce highly non-spherical, jetted outflows. For a constant luminosity GRB central engine, this occurs for density gradient in the envelope ρ~ r^{-ω} steeper than ω>4.

References in corpus (13)

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• A very energetic supernova associated with the gamma-ray burst of 29 March 2003
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• A gamma ray burst with small contamination
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Cited by in corpus (7)

• SN 2013dx associated with GRB 130702A: a detailed photometric and spectroscopic monitoring and a study of the environment
• Supernova ejecta with a relativistic wind from a central compact object: a unified picture for extraordinary supernovae
• The propagation of choked jet outflows in power-law external media
• Broad-band emission properties of central engine powered supernova ejecta interacting with a circumstellar medium
• On the nature of Fast Blue Optical Transients
• Early GRB afterglows from reverse shocks in ultra-relativistic long-lasting winds
• Conditions for jet break-out in NS mergers