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

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_☉ collapse to leave a neutron star (NS) remnant. We calculate the binding energy at core collapse under the assumption that the remnant is an NS. Namely, stellar gas above mass coordinate of ≃ 1.5–2.5 M_☉ is ejected in the explosion. We find that the typical binding energy of the ejecta of stripped-envelope (SE) progenitors with carbon–oxygen core masses of M_CO ≳ 20 M_☉ is E_bind ≳ 2 × 10⁵¹ 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 an SECCSN with a claimed core mass of ≃30–50 M_☉, and conclude that the jittering jets explosion mechanism best accounts for such an explosion that leaves an NS.