Galaxy Mergers May Not Stifle Star Formation After All, According to Illustris TNG

Universe Today Universe Today —

The JWST captured this image of a pair of merging galaxies named Arp 107.</p><p>New simulations show that mergers like this, which are common, are not responsible for quenching galaxies.</p><p>This contradicts the current understanding of galaxy mergers where a merger creates a powerful quasar that then stifles star formation.</p><p>Image Credit: NASA, ESA, CSA, STScIhttps://www.universetoday.com/article_images/webb-arp-107-social_20260728_173849.jpg" width="1280" />

In recent years, the idea that galaxy mergers are responsible for quenching galaxies has grown in importance.

This paradigm says that galaxies merge, their black holes form a powerful quasar, and that quasar stifles star formation.

But new results from the IllustrisTNG simulations shows that this paradigm may not be accurate.

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