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Stellar Evolution confronts Axion Models
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Axion production from astrophysical bodies is a topic in continuous development, because of theoretical progress in the estimate of stellar emission rates and, especially, because of improved stellar observations. We carry out a comprehensive analysis of the most informative astrophysics data, revisiting the bounds on axion couplings to photons, nucleons and electrons, and reassessing the significance of various hints of anomalous stellar energy losses. We confront the performance of various theoretical constructions in accounting for these hints, while complying with the observational limits on axion couplings. We identify the most favorable models, and the regions in the mass/couplings parameter space which are preferred by the global fit. Finally, we scrutinize the discovery potential for such models at upcoming helioscopes, namely IAXO and its scaled versions.
Forward citations
Cited by 2 Pith papers
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Blue Loops, Cepheids, and Forays into Axions
Axion energy loss can erase the blue loop stage in MESA models of 5 to 9 solar mass stars, giving new bounds on the axion-photon coupling from Cepheids and stronger projected bounds for heavier Cepheids.
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Status and Perspectives on Axion Searches
A concise review of axion and ALP search experiments, their recent limits, and upcoming projects.
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