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Galactic Surprise: Spinless Giant Found in Early Universe
8 May
Summary
- Massive, mature galaxy XMM-VID1-2075 lacks expected galactic rotation.
- Discovery was made in the early universe, less than 2 billion years old.
- Webb Telescope observations revealed internal motion of ancient galaxies.
Astronomers have identified a massive galaxy, XMM-VID1-2075, in the early universe that exhibits an unexpected lack of rotation. This "slow rotator" behavior, typically observed in much older, closer galaxies, was found in a system that existed when the universe was less than 2 billion years old. The discovery was made using the James Webb Space Telescope, which allowed researchers to track internal material motion within this ancient galaxy.
Previous observations had already established XMM-VID1-2075 as one of the most massive galaxies in the early universe, containing significantly more stars than the Milky Way and having ceased new star formation. The Webb Telescope's advanced capabilities enabled detailed internal motion studies, a task difficult for distant, seemingly smaller galaxies. The findings suggest a possible single, dramatic collision may have canceled out its spin, rather than a long history of mergers.
Researchers are now actively searching for more such galaxies to test current theories of cosmic evolution. By comparing these observations with computer simulations, scientists aim to understand how common these non-rotating galaxies are in the early universe and refine our understanding of galaxy formation.
