A primordial black hole is a hypothetical type of black hole that is formed not by the gravitational collapse of a large star but by the extreme density of matter present during the universe's early expansion.
According to the Big Bang Model, during the first few moments after the Big Bang, pressure and temperature were extremely great. Under these conditions, simple fluctuations in the density of matter may have resulted in local regions dense enough to create black holes. Although most regions of high density would be quickly dispersed by the expansion of the universe, a primordial black hole would be stable, persisting to the present.
It has been proposed that primordial black holes, specifically those forming in the mass range of 1014 kg to 1023 kg, could be a candidate for dark matter. This is due to the possibility that at this low mass they would behave as expected of other particle candidates for dark matter. Being within the typical mass range of asteroids, this excludes those black holes too small to persist until our era and those too large to explain gravitational lensing observations.
Read more about Primordial Black Hole: Possible Detection, Implications, String Theory
Famous quotes containing the words primordial, black and/or hole:
“Like Freud, Jung believes that the human mind contains archaic remnants, residues of the long history and evolution of mankind. In the unconscious, primordial “universally human images” lie dormant. Those primordial images are the most ancient, universal and “deep” thoughts of mankind. Since they embody feelings as much as thought, they are properly “thought feelings.” Where Freud postulates a mass psyche, Jung postulates a collective psyche.”
—Patrick Mullahy (b. 1912)
“There are no black conservatives. Oh, there are neoconservatives with black skin, but they lack any claim to blackness other than the biological. They have forgotten their roots.”
—Stephen Carter (b. 1954)
“But the surface of the Earth was meant for man. He wasn’t meant to live in a hole in the ground.”
—Edward L. Bernds (b. 1911)