Unlike run - of - the - mill black holes that form from collapsing stars, such primordial black holes could have formed when dense regions of the very
early universe collapsed under their own gravity, some theories suggest.
Not exact matches
However, adding even this small amount of weight at the beginning of the
universe would have resulted in its
collapse early in its history.
Beyond the singularity could be an
earlier,
collapsing phase, or «big crunch,» of our
universe or even the quantum creation of a
universe from nothing.
Direct
collapse black holes, gobbling up dense gas clouds in the
early universe, could fit the bill.
Some theorists had already suggested that, instead of coming from
collapsed stars, the behemoth black holes in the
early universe could have gotten a head start.
As the hot gas that filled the
early universe cooled, denser regions started to
collapse, which set the gas ringing.
• The
early universe was delicately poised between runaway expansion and terminal
collapse.
Collapsing out of dense pockets of hydrogen gas
early in the
universe's history, the first stars flickered on, emitting ultraviolet light that interacted with the surrounding hydrogen.
Or did they form when gas clouds
collapsed in the
early universe?
«We think that the most massive black holes out there in the
early universe formed from direct
collapse, but the less massive ones could have formed in other ways,» says Priyamvada Natarajan at Yale University.
Using data from three of NASA's Great Observatories (the Hubble Space Telescope, Chandra X-ray Observatory, and Spitzer Space Telescope), scientists have found the best evidence to date that supermassive black holes in the
early universe were produced by the direct
collapse of a gas cloud.
One notion is that perhaps the singularity was the relic of an
earlier,
collapsed universe — that we're just one of an eternal cycle of expanding and
collapsing universes, like the bladder on an oxygen machine.