Thermonuclear and Electron-Capture Supernovae from Stripped-Envelope Stars

Understand

(abridged) When stripped from their hydrogen-rich envelopes, stars with initial masses between $\sim$7 and 11 M$_\odot$ develop massive degenerate cores and collapse.

• Depending on the final structure and composition, the outcome can range from a thermonuclear explosion, to the formation of a neutron star in an electron-capture supernova (ECSN).
• It has been recently demonstrated that stars in this mass range may initiate explosive oxygen burning when their central densities are still below $\rho_{\rm c} \lesssim 10^{9.6}$ g cm$^{-3}$.
• This makes them interesting candidates for type Ia supernovae -- which we call (C)ONe SNe Ia -- and might have broader implications for the formation of neutron stars via ECSNe.