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Spectra of axions emitted from main sequence stars

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arxiv 2307.11216 v2 pith:US7ZBU6N submitted 2023-07-20 hep-ph astro-ph.COastro-ph.HEastro-ph.SR

classification hep-phastro-ph.COastro-ph.HEastro-ph.SR
keywords stellaraxionspectrastarsaxionsbackgroundmainprofiles
verification ladder T0 review T1 audit T2 compute T3 formal
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We compute the detailed energy spectra of axions with two-photon coupling produced in stellar cores over a wide range of stellar masses. We focus on main sequence stars and base our calculations on the stellar interior profiles from MESA, for which we provide simple fits in an appendix. The obtained stellar axion spectra, combined with recent models of star formation history and stellar initial mass function, enable us to estimate the properties of the diffuse axion background sourced by all the stars in the universe. The fluxes of this stellar axion background and its decay photons are subdominant to but can in principle be disentangled from those expected from the Sun and the early universe based on their different spectral and spatial profiles.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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    In a hierarchical multi-axion theory with random couplings, axion field ranges shrink with 1/sqrt(N), generic axion–SM couplings are suppressed, but the QCD axion's coupling is unsuppressed.

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  3. Probing Heavy Axion-like Particles from Massive Stars with X-rays and Gamma Rays

    hep-ph 2024-12 conditional novelty 5.0 of 10

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  4. NuSTAR bounds on radiatively decaying particles from M82

    hep-ph 2024-12 conditional novelty 5.0 of 10

    NuSTAR's non-detection of an X-ray halo from decaying axions around M82 excludes a previously allowed window of axion-photon coupling for 30-500 keV axion masses.

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