Diffuse Gas in Galaxies Sheds New Light on the Origin of Type Ia Supernovae

Jonas Johansson, Tyrone E. Woods, Marat Gilfanov +3

We measure the strength of HeII$\lambda$4686 nebular emission in passively evolving ("retired") galaxies, aiming to constrain their populations of hot accreting white dwarfs (WDs) in the…