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    Primordial black hole - Wikipedia

    • In cosmology, primordial black holes (PBHs) are hypothetical black holes that formed soon after the Big Bang. In the inflationary era and early radiation-dominated universe, extremely dense pockets of subatomic matter may have been tightly packed to the point of gravitational collapse, creating primordial black holes without the supernova compression typicall… See more

    History

    Depending on the model, primordial black holes could have initial masses ranging from 10 kg (the so-called Planck relics) to more than thousands of solar masses. However, primordial black holes originally having mas… See more

    Formation

    Primordial black holes could have formed in the very early Universe (less than one second after the Big Bang) during the inflationary era, or in the very early radiation-dominated era. The essential ingredient f… See more

    Implications

    The dark matter problem, proposed in 1933 by Swiss-American astronomer Fritz Zwicky, refers to the fact that scientists still do not know what form dark matter takes. PBH can solve that in a few ways. First, if PBHs accounted f… See more

    Could a primordial black hole be a halo?
    Primordial black holes could be the answer — or, at least, part of it. Primordial black holes could be a type of dark matter called MACHOs, which stands for massive compact halo objects, because astronomers think they’re found in the halos, or outskirts, of galaxies.
    astronomy.com
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    Formation
    Implications
    Could a primordial black hole be a halo?
     
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