Could a white dwarf become a black hole?

No chance of a black hole. A White Dwarf is a star whose mass was insufficient to collapse to form a black hole at the end of its life when fusion ceases. The electrons with the nucleus would collapse but not to the extent that electrons would combine with protons to form neutrons.

How long does it take for a white dwarf to evolve?

For example, a study of white dwarfs in open star cluster M67 found many white dwarfs with temperatures hotter than about 6,000 K, but none cooler than this. A white dwarf takes about 4 billion years to cool to 6,000 K, so we can conclude that the cluster is around 4 billion years old.

How is a black dwarf formed?

A Black dwarf is Hypothesized as the final stage of the life cycle of a Sun-like Star. When Sun burns all of its hydrogen to helium, its core will shrink and it will rearrange itself, expanding its outer layers o form a Redgiant Star. This is called a Black Dwarf.

How old does a star have to be to become a white dwarf?

Stars that are comparable in mass to our Sun will become white dwarfs within 75,000 years of blowing off their envelopes. Eventually they, like our Sun, will cool down, radiating heat into space and fading into black lumps of carbon.

What’s a massive star?

A massive star is a star that is larger than eight solar masses during its regular main sequence lifetime. Massive stars are born, just like average stars, out of clouds of dust called nebulae. A quick main sequence phase, where hydrogen continues to be fused into helium during a stable portion of the star’s life cycle.

How long does it take for a white dwarf to cool?

How long does it take for a white dwarf to cool to a black dwarf? Without energy sources, the white dwarf cools to a black dwarf in a few billion years. [1] However, when I looked into the Wikipedia page on White dwarf, it says

What is the age of a black dwarf?

A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light. Because the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe (13.8 billion years),…

What is the lifespan of a white dwarf star?

A star cluster’s first white dwarfs are born from stars with relatively short main-sequence lives — about 50 million years. The progenitor’s life span is neglible when compared to the billions of years its remnants have existed.

What is the formation of a white dwarf?

Formation. A white dwarf is what remains of a main-sequence star of low or medium mass (below approximately 9 to 10 solar masses ( M☉ )) after it has either expelled or fused all the elements for which it has sufficient temperature to fuse. What is left is then a dense sphere of electron-degenerate matter that cools slowly by thermal…