Which of these events is NOT possible?
A)low-mass stars swelling up to produce planetary nebulae
B)red giants exploding as Type II supernovae
C)close binary stars producing recurrent novae explosions
D)white dwarfs and companion stars producing recurrent Type I supernova events
E)a white dwarf being found in the center of a planetary nebula

Question

Quizplus · Accepted Answer

Type I supernovae, specifically Type Ia, involve a white dwarf in a binary system gaining mass from its companion until it reaches a critical mass and explodes. Unlike recurrent novae, which can erupt multiple times as a white dwarf accretes and then expels material from a companion star, a Type I supernova is a one-time event that completely destroys the white dwarf. Therefore, recurrent Type I supernova events are not possible.

Which of These Events Is NOT Possible