Implications for Stars
Stars less massive than 1.4 MSun can end as white
dwarfs
Stars more massive than 1.4 MSun can end as white
dwarfs, if they lose enough of their mass (during PN
stage) that they end up with less than 1.4 MSun
Stars whose degenerate cores grow more massive than
1.4 MSun will undergo a catastrophic core collapse:
Neutron stars
Supernova