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• W3103604156 abstract "The evolution of white dwarfs can be described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision their luminosity function, that is, the number of stars per unit volume and luminosity interval. Since the shape of the bright branch of this function is only sensitive to the average cooling rate, we use this property to check the possible existence of axions, a proposed but not yet detected weakly interacting particle. We show here that the inclusion of the axion emissivity in the evolutionary models of white dwarfs noticeably improves the agreement between the theoretical calculations and the observational white dwarf luminosity function, thus providing the first positive indication that axions could exist. Our results indicate that the best fit is obtained for macos2β ≊ 2 − 6 meV, where ma is the mass of the axion and cos2β is a free parameter, and that values larger than 10 meV are clearly excluded." @default.
• W3103604156 created "2020-11-23" @default.
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• W3103604156 date "2009-06-01" @default.
• W3103604156 modified "2023-10-06" @default.
• W3103604156 title "Axions and the white dwarf luminosity function" @default.
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• W3103604156 doi "https://doi.org/10.1088/1742-6596/172/1/012005" @default.
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