New research suggests that supermassive black holes, which existed when the universe was less than a billion years old, might have formed thanks to dark matter. This mysterious substance accounts for about 85% of the universe’s mass but doesn’t interact with light, making it difficult to study.
The James Webb Space Telescope (JWST) has been uncovering these early black holes, detected just 500 million years after the Big Bang. It raises an intriguing question: how did they grow so quickly? Scientists believe the typical processes for black hole formation usually take over a billion years.
One theory proposes that large clouds of gas and dust collapsed directly to form black holes faster than usual. However, this process usually needs the energy from shining stars, which were scarce in the universe’s early days. Researchers are now considering that dark matter might provide the necessary energy to spur this growth.
Yash Aggarwal from the University of California, Riverside, stated that decaying dark matter could reshape the evolution of the universe’s first galaxies. He emphasized that the findings from JWST align with this theory, creating an intriguing link between cosmic observations and theoretical models.
Dark matter has long puzzled scientists because it interacts so little with regular matter. Research into new particles, beyond those in the Standard Model of particle physics, is ongoing. Some of these could provide the energy needed to supercharge primordial gas clouds. Researchers estimate that just a tiny fraction of energy—equivalent to a billion trillionth of an AA battery—could be sufficient.
Flip Tanedo, another researcher in the team, explained that early galaxies were made of pure hydrogen gas. These conditions make them especially reactive to even tiny amounts of energy. This means that if dark matter decays, it could trigger the formation of the huge black holes we see today.
The research team highlighted their discovery of specific properties of dark matter that could influence black hole growth. They suggest that particles with a mass between 24 and 27 electronvolts could create conditions ideal for direct collapse, speeding up black hole development.
Published in the Journal of Cosmology and Astroparticle Physics, this study merges insights from particle physics, cosmology, and astrophysics. Tanedo remarked on how effective collaboration among experts led to this breakthrough. These findings may help explain why we observe so many supermassive black holes so early in the universe’s history, suggesting a fascinating interplay between dark matter and cosmic structure.
