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Axions and the Cosmic Optical Background  

Credit: NASA/APL/SwRI and NASA/JPL-Caltech 


By Amal Pushp, Affiliate Physicist at the Resonance Science Foundation 

The cosmic microwave background (CMB) is the earliest glow of radiation present in the universe that apparently dates back to the time when the universe came into being. Similar to this radiation, there is another glow that is lesser heard of and that corresponds to the light emitted in the visible region of the electromagnetic spectrum, mainly by all astrophysical sources outside the milky way. This radiation encompassing the universe is termed the cosmic optical background (COB). From a technical standpoint, the COB is an ensemble of photons, strictly in the visible spectrum, over the volume of the observable universe. One can infer a significant amount of information about galaxies, stellar clusters, etc from the COB. Furthermore, the phenomena involving mass accretion by black holes associated with the galactic and stellar systems also count within reach...

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