Early galaxies may contribute to the 'afterglow' of the universe

Author: Sarthak Arora

As it is well known that the cosmic microwave background represents the afterglow of the big bang and that the non-uniformness is due to mass-energy density variations during the initial stages caused due to the quantum fluctuations. This article is based on a paper that provides another reason for the contribution to this afterglow apart from that due to the recombination, which is the extremely luminous nuclear reactions that were going on. Since elliptical galaxies are considered to be the oldest, the author has observed them specifically and calculated the contributions to the afterglow, which turned out to be significant enough. It is claimed by the author that if this theory and calculations turns out to be true, we might have to improve and re-define our standard theories.

https://phys.org/news/2025-05-early-galaxies-contribute-afterglow-universe.html#google_vignette