Astronomers have recently delved into the mystery of the origin of supermassive black holes, enormous entities found in the cores of almost all galaxies.
With masses ranging from 100,000 to billions of times that of the Sun, these cosmic giants pose a challenge to scientific understanding, especially in light of new observations made with the James Webb Space Telescope (JWST).
The data reveal that such black holes existed just a few hundred million years after the Big Bang, in a period known as the “cosmic dawn“.
Formation too rapid for current models
The early formation of supermassive black holes presents an enigma.
The standard process suggests that they originate from the death of massive stars, which collapse into relatively small black holes.
These remnants should then merge and accumulate material to reach the enormous sizes observed.
However, the time available in the early cosmic epochs seems insufficient to explain such rapid growth.
A recent study published in the Journal of Cosmology and Astroparticle Physics proposes a radical solution: supermassive black holes might have primordial origins, dating back to the first moments following the Big Bang.
Primordial seeds and Hawking’s hypothesis
In the 1970s, theoretical physicist Stephen Hawking suggested that chaotic fluctuations of matter and energy during the Big Bang could have created numerous small primordial black holes.
These would have formed in high-density regions, compressed to extreme levels.
However, according to the theory of Hawking radiation, such black holes should have slowly dissolved over time and be detectable in the present universe.
So far, however, no direct evidence of their existence has been found.
Despite this, researchers hypothesize that a small percentage of these primordial black holes might have been located in extremely dense areas of the universe, where the accumulation of material would have caused them to grow rapidly to supermassive sizes.
This growth could explain their presence in the epochs observed by the JWST.
A shared universe: stars and black holes
According to this model, supermassive black holes would not have formed only after the birth of the first stars and galaxies, but in parallel with them.
During the cosmic dark ages, a period preceding the appearance of starlight, these entities would have started to grow alongside the first seeds of galactic structures.
When the first stars ignited, these gigantic black holes were already an integral part of the fabric of the universe.
Future prospects
This hypothesis requires further verification through advanced simulations of the development of the first galaxies and stars.
Theoretical models will need to be compared with detailed observations from the JWST and other next-generation telescopes to determine if these explanations can indeed solve the mystery of the early formation of supermassive black holes.
If confirmed, this theory would offer a completely new perspective on the dynamics of the early epochs of the universe and the role of primordial black holes in the creation of the cosmic structures we observe today.
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