Science, Space and Technology News 2024
Researchers have discovered the oldest ‘dead’ galaxy, observed 13 billion years after its star formation ceased, using the James Webb Space Telescope. This finding challenges existing theories about galaxy evolution and star formation in the early universe. Credit: SciTechDaily.comA galaxy that suddenly stopped forming new stars more than 13 billion years ago has been observed by astronomers.
“It’s only later in the universe that we start to see galaxies stop forming stars, whether that’s due to aor something else,” said co-author Dr. Francesco D’Eugenio, also from the Kavli Institute for Cosmology. Astronomers believe that star formation can be slowed or stopped by different factors, all of which will starve a galaxy of the gas it needs to form new stars. Internal factors, such as a supermassive black hole or feedback from star formation, can push gas out of the galaxy, causing star formation to stop rapidly. Alternatively, gas can be consumed very quickly by star formation, without being promptly replenished by fresh gas from the surroundings of the galaxy, resulting in galaxy starvation.
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