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A Search for Axionic Dark Matter Using the Magnetar PSR J1745-2900

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arxiv 2008.01877 v2 pith:UBDZLSR6 submitted 2020-08-04 astro-ph.CO astro-ph.HE

Jeremy Darling This is my paper
classification astro-ph.COastro-ph.HE
keywords darkgammamatteraxionj1745-2900axion-photonconversionlimits
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We report on a search for dark matter axion conversion photons from the magnetosphere of the Galactic Center magnetar PSR J1745-2900 using spectra obtained from the Karl G. Jansky Very Large Array. No significant spectral features are detected. Using a hybrid model for PSR J1745-2900 and canonical assumptions about the dark matter density profile, we exclude axion models with axion-photon coupling $g_{a\gamma\gamma}$ > 6-34 x 10$^{-12}$ GeV$^{-1}$ with 95% confidence over the mass ranges 4.2-8.4, 18.6-26.9, 33.0-41.4, 53.7-62.1, and 126.0-159.3 $\mu$eV. If there is a dark matter cusp, the limits reduce to $g_{a\gamma\gamma}$ > 6-34 x 10$^{-14}$ GeV$^{-1}$, which overlap some axion models for the observed mass ranges > 33 $\mu$eV. These limits may be improved by modeling the stimulated emission that can boost the axion-photon conversion process.

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Cited by 4 Pith papers

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

  1. Gravitational Wave Scattering on Magnetic Fields

    gr-qc 2025-07 accept novelty 7.0 of 10

    In a 3D treatment of the inverse Gertsenshtein effect, an isotropic unpolarized gravitational wave background scattering off a dipolar magnetic field yields partially linearly polarized radio emission, with peak inten...

  2. Constraining meV Axion Dark Matter with ALMA Observations of the Galactic Center Magnetar SGR 1745-2900

    hep-ph 2025-12 conditional novelty 6.0 of 10

    ALMA observations of the magnetar SGR 1745-2900 exclude axion-photon couplings down to ~2e-13 GeV^-1 in the 0.55-0.62 meV mass range, reaching the QCD axion window under a dark-matter spike model.

  3. Galactic Centre Pulsars with the SKAO

    astro-ph.HE 2026-07 accept novelty 4.0 of 10

    Updated SKA-MID sensitivity and multi-beam search strategies can detect up to ~84% of Galactic Centre pulsars (and ~60% of MSPs) under magnetar-like scattering, unlocking precision tests around Sgr A*.

  4. DALI sensitivity to streaming axion dark matter

    hep-ph 2024-04 unverdicted novelty 4.0 of 10

    DALI has sensitivity to axion streams spanning two decades in mass that matches photon coupling strengths of representative axion models.

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