Resonant axion-plasmon conversion in neutron star magnetospheres

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Terças, H. and Mendonça, J. T. and Bingham, R. (2025) Resonant axion-plasmon conversion in neutron star magnetospheres. Physical Review Letters, 135 (11). 111001. ISSN 1079-7114 (https://doi.org/10.1103/5hbb-yy48)

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Abstract

Resonant axion-plasmon conversion in the magnetospheres of magnetars may substantially impact the landscape of dark-matter axion detection. This Letter explores how resonant axion-plasmon conversion modify the expected radio signals from axion-photon conversions observed on Earth. Critically, the resonant conversion radius lies within the region expected for axion-photon conversion, introducing a nonradiative power loss that diminishes the anticipated photon flux. Our analysis demonstrates that this effect can reduce radio telescope sensitivities, shifting them into regions excluded by previous experiments. These findings compel a reassessment of experimental constraints derived from radio signatures of axion-photon conversions and highlight the necessity of accounting for plasmon effects in astrophysical axion searches. The presented corrections provide critical insights for refining the detection strategies of future telescope-based dark matter axion experiments.

ORCID iDs

Terças, H., Mendonça, J. T. and Bingham, R. ORCID logoORCID: https://orcid.org/0000-0002-9843-7635;
  • Item type:Article
    ID code:94218
    Dates:
    Date
    Event
    9 September 2025
    Published
    15 August 2025
    Accepted
    Subjects:Science > Physics
    Science > Astronomy
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:18 Sep 2025 09:11
    Last modified:14 Apr 2026 11:50
    URI:https://strathprints.strath.ac.uk/id/eprint/94218
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