Intense flashes of light, not mass, resolve the puzzle of impossible brightness. When scientists viewed the James Webb Space Telescope’s (JWST) first images of the universe’s earliest galaxies, they were shocked. The young galaxies appeared too bright, too massive, and too mature to have formed s
The James Webb Space Telescope’s images of early galaxies showed unexpected brightness, raising questions about our cosmological understanding. Northwestern University’s simulations suggest these galaxies’ luminosity is due to sporadic star formation, not massive size, aligning with current cosmological models.) first images of the universe’s earliest galaxies, they were shocked.
“The discovery of these galaxies was a big surprise because they were substantially brighter than anticipated,” said Northwestern’s, Claude-André Faucher-Giguère, the study’s senior author. “Typically, ais bright because it’s big. But because these galaxies formed at cosmic dawn, not enough time has passed since the. How could these massive galaxies assemble so quickly? Our simulations show that galaxies have no problem forming this brightness by cosmic dawn.
The FIRE simulations combine astrophysical theory and advanced algorithms to model galaxy formation. The models enable researchers to probe how galaxies form, grow and change shape, while accounting for energy, mass, momentum, and chemical elements returned from stars.
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