If black holes never lose any mass through Hawking radiation, it would indeed have significant implications for our understanding of the current state and evolution of the universe. Hawking radiation is a theoretical prediction made by physicist Stephen Hawking, which suggests that black holes can slowly lose mass over time through quantum effects near the event horizon.
The process of Hawking radiation has important consequences for black holes. It implies that they can gradually lose mass and eventually evaporate completely over an immensely long timescale. This prediction has been influential in the study of black hole thermodynamics and the information paradox, which concerns the fate of information that falls into a black hole.
If black holes were unable to lose mass through Hawking radiation, it would challenge our current understanding of several key areas:
Black Hole Lifetimes: Without Hawking radiation, black holes would no longer have a mechanism for gradual evaporation. This would have implications for the lifetime and ultimate fate of black holes, potentially leading to the persistence of black holes for extremely long durations.
Cosmology and the Early Universe: Hawking radiation has implications for the early universe and its evolution. It is believed that in the early stages of the universe, primordial black holes could have formed. If these black holes were unable to evaporate via Hawking radiation, their continued presence would have consequences for the dynamics and structure of the early universe.
Information Paradox: The absence of Hawking radiation would also have implications for the resolution of the information paradox. The information paradox arises from the apparent contradiction between the principles of quantum mechanics and the loss of information that would occur if black holes could completely evaporate. The resolution of this paradox is still an area of active research, and the absence of Hawking radiation would necessitate alternative explanations for the fate of information trapped within black holes.
In summary, if black holes were unable to lose mass through Hawking radiation, it would challenge our understanding of black hole dynamics, the evolution of the early universe, and the resolution of the information paradox. It would require significant revisions to our current theories and models of these phenomena.