Primordial Black Holes
Illustration of Black Hole B lack holes are one of the most cryptic objects in the Universe. Even after 100 years of its theoretical prediction by Einstein’s General Theory of Relativity, scant knowledge about these gravitationally massive objects. Black holes can be of many types Stellar, Intermediate, Supermassive, Miniature and Primordial Black holes. All the theoretical predictions confirmed observationally to date are related to Stellar Black holes. So what precisely are Primordial Black holes? How were they formed? What are the Observational constraints on them? And why are they considered significant for the advancement of Modern Cosmology? In 1971, Stephen Hawking propounded that when the age of the Universe was less than a second, excessively dense regions in the Universe underwent gravitational collapse and directly formed black holes. These Black holes were known as Primordial Black holes (PBHs). Like Stellar Black holes, they do not originate from the death of a star but a