Axion Constraints Derived from White Dwarf Cooling in 47 Tucanae

A paper published on arXiv on November 27, 2025, introduces new constraints on the potential existence of axions by analyzing the cooling process of white dwarfs in the globular cluster 47 Tucanae. Led by Leesa Fleury, the research team observed signs that white dwarfs are cooling faster than predicted, suggesting that axions might be carrying away energy. This anomaly in cooling rates points towards a novel explanation beyond standard physics.

The study precisely calculated the energy loss rate from white dwarfs due to axion emission, comparing observational data with theoretical models. This yielded specific numerical constraints on the mass and interaction strength of axions, particles considered a prime candidate for dark matter. The findings represent a significant step in understanding axion properties and how these fundamental particles influence stellar evolution and the cosmos.

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