HomePhysicsDarkish Matter May Trigger Extra Optical Background

# Darkish Matter May Trigger Extra Optical Background

&bullet; Physics 15, s161

Axions that decay into photons may account for seen gentle that exceeds what’s anticipated to come back from all recognized galaxies.

Evaluating COB measurements to predictions supplies a instrument for testing hypotheses in regards to the construction of the Universe. However measuring the COB could be very tough attributable to contamination by diffuse gentle from a lot nearer sources, particularly daylight scattered by interplanetary mud. Observing from the sting of our Photo voltaic System, New Horizons needs to be unaffected by most of this contamination, making the measured extra brightness a instrument for enhancing our understanding of galaxy evolution.

Researchers have attributed the surplus to the glow of unknown galaxies and extra-galactic stars, however Bernal and his colleagues present that it might be defined by the decay of axions if these hypothetical particles exhibit a selected axion-photon coupling energy. In response to the staff’s computations, axions having a mass between 8 and 20 eV may account for the surplus flux in the event that they convert to photons at a fee of

$\sim$

1/1015 years. The researchers say that their work, as effectively exploring a possible rationalization for the COB extra, motivates future searches for darkish matter with these traits.

–Rachel Berkowitz

Rachel Berkowitz is a Corresponding Editor for Physics Journal primarily based in Vancouver, Canada.

## References

1. J. L. Bernal et al., “Cosmic optical background extra, darkish matter, and line-intensity mapping,” Phys. Rev. Lett. 129, 231301 (2022).

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