The jittering jets explosion mechanism (JJEM) in electron capture supernovae

Abstract

We conduct one-dimensional stellar-evolution simulations of stars with zero age main sequence masses of $M_{ZAMS}=8.8-9.45M_{\odot }$ towards core collapse by electron capture, and find that the convective zone of the pre-collapse core can supply the required stochastic angular momentum fluctuations to set a jet-driven electron capture supernova (ECSN) explosion in the frame of the jittering jets explosion mechanism (JJEM). By our assumed criteria of a minimum convective specific angular momentum and an accreted mass during jet-launching of $M_{acc}\simeq 0.001-0.01M_{\odot }$, the layer in the convective zone that when accreted launches the exploding jittering jets resides in the helium-rich zone. Depending on the model, this exploding layer is accreted at about a minute to a few hours after core collapse occurs, much shorter than the time the exploding shock crosses the star. The final (gravitational) mass of the neutron star (NS) remnant is in the range of $M_{NS}=1.25-1.43M_{\odot }$.

Accepted for publication in ApJ

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Cited by in corpus (4)

• Identifying jittering-jet-shaped ejecta in the Cygnus Loop supernova remnant
• Simulating the shaping of point-symmetric structures in the jittering jets explosion mechanism
• The Formation of Electron-capture Supernovae: A Review
• A kinematically constrained kick distribution for isolated neutron stars