The implications of large binding energies of massive stripped core collapse supernova progenitors on the explosion mechanism

TL;DR

This paper investigates the high binding energies of massive stripped-envelope supernova progenitors and argues that the jittering jets explosion mechanism is most suitable for such cases, especially for cores with masses over 20 solar masses.

Contribution

It demonstrates that massive stripped-envelope progenitors have high binding energies, supporting the jittering jets explosion mechanism for core collapse supernovae with large cores.

Findings

Binding energies of >2 x 10^{51} erg for cores >20 M_sun.

Jets are likely the explosion mechanism for high-mass cores.

Application to SN 2020qlb supports jittering jets model.

Abstract

We examine the binding energies of massive stripped-envelope core collapse supernova (SECCSN) progenitors with the stellar evolution code MESA, and find that the jittering jets explosion mechanism is preferred for explosions where carbon-oxygen cores with masses of $>20 M_\odot$ collapse to leave a neutron star (NS) remnant. We calculate the binding energy at core collapse under the assumption that the remnant is a NS. Namely, stellar gas above mass coordinate of $~1.5-2.5 M_\odot$ is ejected in the explosion. We find that the typical binding energy of the ejecta of stripped-envelope progenitors with carbon-oxygen core masses of $M_{CO} > 20 M_\odot$ is $E_{bind}>2 \times 10^{51} erg$. We claim that jets are most likely to explode such cores as jet-driven explosion mechanisms can supply high energies to the explosion. We apply our results to SN 2020qlb, which is a SECCSN with a claimed core mass of $~30-50 M_\odot$, and conclude that the jittering jets explosion mechanism best accounts for such an explosion that leaves a NS.