A Cosmic Noon Puzzle: Why Did Cosmic Noon Galaxies Emit So Many Cosmic Rays?

August 15, 2025 Universe Today

A Cosmic Noon Puzzle: Why Did Cosmic Noon Galaxies Emit So Many Cosmic Rays?
By Evan Gough (https://ift.tt/xcm2J6K)

The background image is the COSMOS field observed with the South African MeerKAT radio array. An artistic illustration of the high-energy cosmic ray halo of a star forming galaxy at cosmic noon is overlain. Image Credit: Inter-University Institute for Data-Intensive Astronomy

The Universe's early galaxies were engulfed in halos of high-energy cosmic rays. It's likely because they had tangled and turbulent magnetic fields. These fields accelerate cosmic rays to higher energies.

August 16, 2025 at 12:27AM
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