what is the composition of a white dwarf
Usually, therefore, white dwarfs are composed of carbon and oxygen. If the mass of the progenitor is between 8 and 10.5 solar masses (Mâ), the core temperature is sufficient to fuse carbon but not neon, in which case an oxygen-neonâ magnesium white dwarf may be formed. white dwarf is very dense: its mass is comparable to that of the Sun, and its volume is comparable to that of Earth. A white dwarf's faint luminosity comes from the emission of stored thermal energy.