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The Sun is a well-studied astrophysical source of axion-like particles(ALPs), produced mainly through the Primakoff process. Moreover, in the Sunthere exist large-scale magnetic fields that catalyze an additional ALPproduction via a coherent conversion of thermal photons. We study thiscontribution to the solar ALP emissivity, typically neglected in previousinvestigations. Furthermore, we discuss additional bounds on the ALP-photoncoupling from energy-loss arguments, and the detection perspectives of this newALP flux at future helioscope and dark matter experiments.

Production of axion-like particles from photon conversions in large-scale solar magnetic fields