New dark matter theory could solve multiple cosmic mysteries at once
Physicists at the Chinese Academy of Sciences have proposed a 'two-component' dark matter model to explain anomalies in galaxy formation. The theory suggests that dark matter particles of different masses interact with each other, causing them to segregate within galaxies.
Why it matters
This model addresses long-standing discrepancies between the standard cold dark matter theory and observed galaxy structures, potentially solving a major cosmic mystery.
Dark matter has long been one of astronomy's greatest mysteries. It cannot be seen or touched, yet its gravitational influence helps shape galaxies and the large scale structure of the universe. For decades, scientists have relied on the "cold dark matter" model to explain how galaxies formed and evolved. But as telescopes and observations have become more precise, researchers have uncovered several puzzling features that the standard model struggles to explain.
Among the biggest mysteries are the surprisingly low concentrations of dark matter found at the centers of some dwarf galaxies and the unexpectedly dense dark matter clumps inferred from strong gravitational lensing. Although these observations seem to point in opposite directions, a new study suggests they could share the same underlying explanation.
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