Portsmouth Model Says 90-Meter Pre-Big Bang Black Holes Could Explain Dark Matter
Updated
Updated · ScienceDaily · Aug 11
Portsmouth Model Says 90-Meter Pre-Big Bang Black Holes Could Explain Dark Matter
2 articles · Updated · ScienceDaily · Aug 11
Summary
Black holes larger than roughly 90 meters could have survived a pre-Big Bang contracting phase, according to a University of Portsmouth study proposing a cosmic “bounce” instead of a singular origin.
The model argues quantum pressure halted collapse at very high but finite density and reversed it into expansion, letting ancient black holes, gravitational waves and density fluctuations persist as cosmic relics.
Those relic black holes could make up a substantial share of dark matter—possibly all of it—and could also help explain why unexpectedly massive objects appeared so early in cosmic history.
James Webb observations of early massive sources, including some “little red dots,” fit the idea that black holes may have existed immediately after the bounce rather than forming from scratch later.
The theory remains unproven and would need tests such as searches for relic gravitational waves or subtle pre-Big Bang signatures in the cosmic microwave background.
Could the mysterious dark matter we observe today actually be the fossilized remains of black holes from a universe before the Big Bang?
If a cosmic bounce replaced the Big Bang, what hidden signals from the previous universe are still echoing in today's gravitational waves?
Could stars currently be swallowing ancient black holes that survived the universe's ultimate collapse, triggering explosive flashes in our night sky?
Surviving the Cosmic Bounce: How Relic Black Holes Could Solve the Dark Matter Puzzle
Overview
This report explores how quantum effects can prevent the universe from collapsing into a singularity, instead causing a cosmic bounce that allows certain black holes and compact objects to survive and shape the next universe. It compares bounce cosmology with cosmic inflation, highlighting how bounce models avoid some problems of inflation but face their own challenges, such as entropy buildup and observational tests. The report also discusses how clustered primordial black holes could make up dark matter, and how new telescopes and gravitational wave detectors may soon reveal signals from these ancient objects. Together, these ideas offer new ways to understand the universe’s origins and its hidden matter.