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Dark matter origins traced back to a mysterious “Dark Big Bang”
- Dark matter, an unseen yet influential component of the cosmos, continues to challenge physicists nearly a century after its effects were first noticed.
- The mystery of dark matter first emerged in the 1930s, when astronomers observed discrepancies in the motions of galaxy clusters that could only be explained by the presence of unseen mass.
- One groundbreaking idea is the “Dark Big Bang” (DBB) theory, proposed in 2023 by Katherine Freese and Martin Winkler from the University of Texas at Austin.
- This second Big Bang, occurring sometime after the first, would have generated dark matter through the decay of a quantum field trapped in a false vacuum state.
- The DBB model is particularly versatile, as it can accommodate a wide range of dark matter particle masses, from as light as a few keV to as heavy as 1012 GeV.
- Low-frequency GWs detectable by pulsar timing arrays (PTAs) such as the International Pulsar Timing Array (IPTA) and the Square Kilometer Array (SKA) could provide crucial evidence for the DBB.
- The DBB theory offers a fresh perspective on the early universe, suggesting a more complex interplay of forces and fields in the universe’s infancy.
- The search for dark matter is a central pillar of modern physics, driving advancements in technology and theory.
- Observational capabilities advance, the prospect of detecting GWs from a DBB becomes increasingly plausible, adding a powerful new tool to this arsenal.
- Understanding dark matter is not just a scientific pursuit but a quest to comprehend the fundamental nature of the universe.
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