Radio Background Anomalies and Black Holes
This is a fairly complicated subject, but I will try to summarize the main points from recent research papers on the cosmic radio wave background, as well as some potentially important implications of this research. I will also add links to the original papers for those who like to do deep drives.
ARCADE 2 Experiment: In 2011 Seiffert et al published the results of an experiment to measure the cosmic radio background radiation (https://arxiv.org/abs/0901.0559). Quite surprisingly they found that there was a factor of 6 radio wave excess at ~ 1 GHz that was isotropic and appeared to have a power law (scale invariant) emission spectrum. The leader (Kogut) of the NASA team conducting the ARCADE experiments noted that one possible explanation for this deviation from expectations based on conventional cosmological modeling was a large population of black holes present in the early universe.
EDGES Experiment: In 2018 Bowman et al (https://www.nature.com/articles/nature25792) reported a possible detection of the “cosmic dawn” (light from the first stars to form in the early universe) in the form of a 21 cm signal redshifted to 78 MHz. However, again this differed considerably from expectations based on conventional cosmological models. The signal was more than a factor of 2 stronger than the most generous predictions and the signal had a non-Gaussian shape. Again we find that a large population of primordial black holes offers a potential explanation for the EDGES anomaly.
Dowell and Taylor Paper: More recently Dowell and Taylor have posted a new study of the cosmic radio background (https://arxiv.org/abs/1804.08581). Using the best and more extensive available data they have again analyzed the cosmic radio background. They found “support for a strong, diffuse radio background that was suggested by the ARCADE 2 results in the 3 to 10 GHz range. We also find that the background is well modeled by a power law…” Additionally they comment that: “radiation from primordial black holes could provide a sufficient background field to produce the observed [EDGES] line depth without violating the constraints set by diffuse cosmic backgrounds at other wavelengths.”
So we have a growing body of research relating to the cosmic radio background which is at variance with the conventional cosmological modeling, but is consistent with large populations of primordial black holes present in the early universe. This in turn is consistent with Discrete Scale Relativity’s definitive prediction that the bulk of the dark matter is composed of stellar-mass primordial black holes.