Reviving the stalled shock by jittering jets in core collapse supernovae: jets from the standing accretion shock instability

Abstract

I present a scenario by which an accretion flow with alternating angular momentum sense on to a newly born neutron star in core collapse supernovae (CCSNe) efficiently amplifies magnetic fields and by that launches jets. The accretion flow of a collapsing core on to the newly born neutron star suffers the spiral standing accretion shock instability (SASI). This instability leads to a stochastically variable angular momentum of the accreted gas, that in turn forms an accretion flow with alternating directions of the angular momentum, hence alternating shear, at any given time. I study the shear in this alternating-shear sub-Keplerian inflow in published simulations, and present a new comparison with Keplerian accretion disks. From that comparison I argue that it might be as efficient as Keplerian accretion disks in amplifying magnetic fields by a dynamo. I suggest that although the average specific angular momentum of the accretion flow is small, namely, sub-Keplerian, this alternating-shear accretion flow can launch jets with varying directions, namely, jittering jets. Neutrino heating is an important ingredients in further energizing the jets. The jittering jets locally revive the stalled accretion shock in the momentarily polar directions, and by that they explode the star. I repeat again my call for a paradigm shift from a neutrino-driven explosion of CCSNe to a jet-driven explosion mechanism that is aided by neutrino heating.

Accepted for publication in Research in Astronomy and Astrophysics

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Cited by in corpus (17)

• Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae
• Revisiting the explodability of single massive star progenitors of stripped-envelope supernovae
• The role of jets in exploding supernovae and in shaping their remnants
• Supplying angular momentum to the jittering jets explosion mechanism using inner convection layers
• Emission peaks in the light curve of core collapse supernovae by late jets
• Boosting jittering jets by neutrino heating in core collapse supernovae
• Remnant masses of core collapse supernovae in the jittering jets explosion mechanism
• The implications of large binding energies of massive stripped core collapse supernova progenitors on the explosion mechanism
• Powering luminous core collapse supernovae with jets
• Amplifying magnetic fields of a newly born neutron star by stochastic angular momentum accretion in core collapse supernovae
• The jittering jets explosion mechanism (JJEM) in electron capture supernovae
• Jet-shaped geometrically modified light curves of core collapse supernovae
• Simulating the inflation of bubbles by late jets in core collapse supernova ejecta
• Enhanced mass-loss rate evolution of stars with $\gtrsim 18M_{\odot }$ and missing optically-observed type II core-collapse supernovae
• Low energy core collapse supernovae in the frame of the jittering jets explosion mechanism
• Implications of post-kick jets in core collapse supernovae
• Rapid decline in the lightcurves of luminous supernovae by jet-driven bipolar explosions