Primordial Universe May Have Forged Black Holes, Exotic Stars in First Moments
Trieste, Italy – November 10, 2025 – A new theoretical inquiry suggests that the universe, within the fleeting instant following the Big Bang, may have been a crucible for the creation of black holes, boson stars, and a previously hypothesized class of objects dubbed “cannibal stars.” Researchers at the international School of Advanced Studies (SISSA) in trieste have modeled particle interactions in the extreme conditions of the early universe, revealing a potential pathway for the spontaneous formation of these celestial bodies.
This research, published this week, offers a glimpse into the universe’s earliest epochs and could reshape our understanding of the seeds from which larger structures-galaxies and the supermassive black holes at their centers-eventually grew. The findings address a long-standing question about the origin of primordial black holes, which are theorized to have formed not from stellar collapse, but directly from density fluctuations in the early universe. Understanding their formation mechanisms is crucial for exploring dark matter candidates and the universe’s initial conditions.
The study focuses on the period instantly after the Big Bang, when the universe was incredibly hot and dense. As the universe expanded and cooled, high-energy particle collisions could have created localized regions of extreme density. According to the SISSA team’s calculations, these conditions were ripe for gravitational collapse, leading to the formation of black holes with masses potentially ranging from asteroid-sized to several times that of our Sun.
Beyond black holes, the simulations also predict the possibility of boson stars-hypothetical stars composed of bosons, basic particles with integer spin-and “cannibal stars.” Cannibal stars are theorized to grow by accreting matter from their surroundings at an accelerated rate, potentially becoming important gravitational players in the early universe.
“We are exploring a scenario where the very fabric of spacetime was different in the first second of existence,” explained a SISSA researcher. “The energy densities were so high that the usual rules of stellar evolution didn’t necessarily apply,opening the door to the creation of these exotic objects.”
The team’s work relies on advanced computational modeling and theoretical physics. Future observations, particularly those searching for gravitational waves or the effects of primordial black holes on cosmic microwave background radiation, may provide evidence to support or refute these predictions. The research underscores the ongoing effort to unravel the mysteries of the universe’s infancy and the fundamental laws governing it’s evolution.
Citation: Within a second after the Big Bang, particle interactions may have created black holes, boson stars and cannibal stars (2025, November 10) retrieved November 10, 2025 from https://phys.org/news/2025-11-big-particle-interactions-black-holes.html. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part might potentially be reproduced without the writen permission. The content is provided for information purposes only.
