A Cosmic Noon Puzzle: Why Did Cosmic Noon Galaxies Emit So Many Cosmic Rays?
Astrobitica
August 15, 2025 (Last updated: August 15, 2025) 1 minute read
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.