The Unique Helium Nova V445 Puppis Ejected $\gg$0.001 M${}_{\odot }$ in the Year 2000 and Will Not Become a Type Ia Supernova

Bradley E. Schaefer

V445 Puppis is the only known example of a helium nova, where a layer of helium-rich gas accretes onto the surface of a white dwarf in a cataclysmic variable, with runaway helium b…