Join Hugh Ross in this breaking News of the Day episode of Stars, Cells, and God. Hugh describes a search for dark photons, a candidate for comprising a large fraction of the universe’s dark matter. The search consisted of comparing a detailed map of the cosmic microwave background radiation (CMBR) with a catalog of more than 500 million galaxies.
- Dark matter makes up 24.5% of the universe.
Probability of ordinary photons from the CMBR morphing into dark photons peaks when they pass through the plasma of electrons surrounding galaxy clusters.Loss of CMBR photons will be correlated with galaxy cluster positions and would make the CMBR map look more splotchy.The search team accounted for other effects known to distort the CMBR map.The search team found no evidence for dark photons. They placed an upper limit on dark photon contribution to dark matter more than 10 times lower than previous analyses.Future comparisons of the CMBR map with positions of denser, older galaxies will yield more stringent limits on dark photons.Axions remain as the leading candidate particles to comprise the majority of the universe’s dark matter.- Dark Photon Limits from Patchy Dark Screening of the Cosmic Microwave Background
News of the Day episode: Dark Matter Particles?