White dwarf that miraculously
survived its own thermonuclear detonation, raising questions over how and why these stars create supernovas.
As such, they are
dense objects with gravity strong enough to pull material from any close orbiting companion stars.
White dwarfs are
only about the size of Earth, but they contain a mass equivalent to that of a star.
This material flows onto
the white dwarf, and once enough material has built up, it explodes in a thermonuclear detonation that usually destroys the star
Astronomers have identified
what they suspect are failed Type Ia supernovas that leave behind remnant 'zombie' stars
Usually, the light of
a Type Ia supernova is powered by the radioactive decay of cobalt-56 and -57 isotopes in the material blown out into space