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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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.