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PreprintarXiv licencearXiv

Magnetic Turbulence Boosts Supernova Signals of Axion-Photon Conversion

  • Damiano F. G. Fiorillo
  • Ángel Gil Muyor
  • Georg G. Raffelt
  • Edoardo Vitagliano
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Abstract

Magnetic fields between a supernova (SN) and Earth convert axions into gamma rays. The absence of such a signal in coincidence with SN 1987A neutrinos, using the coherent Milky Way field, provides well-studied constraints on gap× gaγ (axion-proton times axion-photon couplings) and on gaγ alone. We show that the small-scale power of the turbulent magnetic field component boosts axion-photon conversion and, crucially, extends sensitivity to larger masses. The turbulent field components of the Milky Way and of the Large Magellanic Cloud (hosting SN 1987A) yield improvements of up to two orders of magnitude in gap× gaγ. Turbulence should likely impact the sensitivity of other searches based on other axion-photon conversion sites, such as starburst galaxies.

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Cite

BibTeXRIS
BibTeX
@misc{fiorillo2026magnetic,
  title = {{Magnetic Turbulence Boosts Supernova Signals of Axion-Photon Conversion}},
  author = {Damiano F. G. Fiorillo and Ángel Gil Muyor and Georg G. Raffelt and Edoardo Vitagliano},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2605.15261},
  eprint = {2605.15261},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.15261},
}
RIS
TY  - UNPB
TI  - Magnetic Turbulence Boosts Supernova Signals of Axion-Photon Conversion
AU  - Damiano F. G. Fiorillo
AU  - Ángel Gil Muyor
AU  - Georg G. Raffelt
AU  - Edoardo Vitagliano
PY  - 2026
DA  - 2026/09/21
PB  - arXiv
DO  - 10.48550/arxiv.2605.15261
UR  - https://arxiv.org/abs/2605.15261
AB  - Magnetic fields between a supernova (SN) and Earth convert axions into gamma rays. The absence of such a signal in coincidence with SN 1987A neutrinos, using the coherent Milky Way field, provides well-studied constraints on g_ap× g_aγ (axion-proton times axion-photon couplings) and on g_aγ alone. We show that the small-scale power of the turbulent magnetic field component boosts axion-photon conversion and, crucially, extends sensitivity to larger masses. The turbulent field components of the Milky Way and of the Large Magellanic Cloud (hosting SN 1987A) yield improvements of up to two orders of magnitude in g_ap× g_aγ. Turbulence should likely impact the sensitivity of other searches based on other axion-photon conversion sites, such as starburst galaxies.
ER  -