Precision measurements of intracluster light suggest possible link to dark matter

A combination of observational data and sophisticated computer simulations have yielded advances in a field of astrophysics that has languished for half a century. The Dark Energy Survey, which is hosted by the U.S. Department of Energy’s Fermi National Accelerator Laboratory, has published a burst of new results on what’s called intracluster light, or ICL, a faint type of light found inside galaxy clusters.

Source:
https://phys.org/news/2021-01-precision-intracluster-link-dark.html