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Galactic Collision Reveals Quasars' Impact on Evolution

5/26/2025

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Summary

Astronomers Discover Cosmic Collision

Astronomers have witnessed a breathtaking cosmic collision, dubbed the "cosmic joust," between two galaxies located over 11 billion light-years away. One of these galaxies, home to a powerful quasar, emits intense radiation that hinders star formation in its partner. This groundbreaking study, led by French and Russian researchers, uncovers the profound impact quasars have on galaxy evolution.

Summary

Supernova Remnants Accelerate

Recent research reveals that supernova remnants, such as Tycho, could serve as extraordinary cosmic ray accelerators, known as "PeVatrons." These spectacular explosions have the potential to produce cosmic rays surpassing one peta-electron volt, but only in certain conditions. Furthermore, winds from supermassive black holes may also play a role in generating ultra-high-energy cosmic rays, connecting tiny particles to monumental cosmic events.

History

Historical Context

Astronomers' recent observations of a cosmic collision between two galaxies highlight the significance of quasars in galaxy evolution. Quasars, first identified in the 1960s, are linked to the universe's reionization phase after the Big Bang. Their intense radiation influences star formation, echoing earlier discoveries that established quasars as critical to understanding cosmic structures and the evolution of galaxies over billions of years.

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Astronomers Discover Cosmic Collision

Astronomers have witnessed a breathtaking cosmic collision, dubbed the "cosmic joust," between two galaxies located over 11 billion light-years away. One of these galaxies, home to a powerful quasar, emits intense radiation that hinders star formation in its partner. This groundbreaking study, led by French and Russian researchers, uncovers the profound impact quasars have on galaxy evolution.

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