SN 2020jgb: A Peculiar Type Ia Supernova Triggered by a Helium-Shell Detonation in a Star-Forming Galaxy

Chang Liu, Adam A. Miller, Abigail Polin +25

The detonation of a thin ($\lesssim$$0.03{\mathrm{M}}_{\odot }$) helium shell (He-shell) atop a $\sim$$1{\mathrm{M}}_{\odot }$ white dwarf (WD) is a promising mechanism to explain normal…