What are Primordial Black Holes?

According to research conducted by the Kavli Institute for the Physics and Mathematics of the Universe about the universe, one of their studies showed that black holes could have formed in the early universe before stars and galaxies were born, such as black holes were named Primordial Black Holes.

To its origin, they talk about different possibilities and one such exciting possibility is that primordial black holes are formed from the “baby universes” created during the expansion that is believed to be responsible for establishing the structures we observe today, such as galaxies and clusters of galaxies.

 During expansion, baby universes were thought to branch off from our universe. A small baby (or “daughter”) universe would eventually collapse, but a large amount of energy is released in the small volume causes a black hole to form.

Scientists believed that their could be two fate of this baby universe. If it is bigger than some critical size, Einstein’s theory of gravity allows the baby universe to exist in a state that appears different to an observer on the inside and the outside.

An internal observer sees it as an expanding universe, while an outside observer (such as us humans) sees it as a black hole. In either case, the big and the small baby universes are seen by us as primordial black holes.

This shows us about the underlying structure of multiple universes behind their “event horizons.”

The event horizon is a boundary below which everything, even light, is trapped and cannot escape the black hole.

Such primordial black holes (PBHs) could account for all or part of dark matter, be responsible for some of the observed gravitational waves signals, and seed super massive black holes found in the center of our Galaxy and other galaxies. In particular, there is an exciting possibility that the mysterious dark matter, which accounts for most of the matter in the universe, is composed of primordial black holes.

The 2020 Nobel Prize in physics was awarded to a theorist, Roger Penrose, and two astronomers, Reinhard Genzel and Andrea Ghez, for their discoveries that confirmed the existence of black holes. Since black holes are known to exist in nature, they make a very appealing candidate for dark matter.

This article was originally Published in Science Daily