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Detecting Axion-like Dark Matter with Linearly Polarized Pulsar Light

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arxiv 1901.10981 v2 pith:YI6HFOY3 submitted 2019-01-30 astro-ph.CO astro-ph.GAhep-phhep-th

Tao Liu , George Smoot , Yue Zhao This is my paper · ORCID
classification astro-ph.COastro-ph.GAhep-phhep-th
keywords axion-likelightpulsaraxiondarkgalacticlinearlymatter
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

Non-relativistic QCD axions or axion-like particles are among the most popular candidates for cold Dark Matter (DM) in the universe. We proposed to detect axion-like DM, using linearly polarized pulsar light as a probe. Because of birefringence effect potentially caused by an oscillating galactic axion DM background, when pulsar light travels across the galaxy, its linear polarization angle may vary with time. With a soliton+NFW galactic DM density profile, we show that this strategy can potentially probe an axion-photon coupling as small as $\sim 10^{-13}$ GeV$^{-1}$ for axion mass $m_a \sim 10^{-22}-10^{-20}$ eV, given the current measurement accuracy. An exclusion limit stronger than CAST ($ \sim 10^{-10}$ GeV$^{-1}$) and SN1987A ($ \sim 10^{-11}$ GeV$^{-1}$) could be extended up to $m_a \sim 10^{-18}$ eV and $\sim 10^{-19}$ eV, respectively.

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Cited by 3 Pith papers

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

  1. Searches for signatures of ultra-light axion dark matter in polarimetry data of the European Pulsar Timing Array

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    Analysis of EPTA pulsar polarimetry finds no evidence for ultra-light axion dark matter, sets upper limits on the axion-photon coupling, and attributes a common 2-year-period signal to ionospheric Faraday rotation.

  2. Circular polarization effects induced by photon-axion mixing in astrophysical environments

    astro-ph.HE 2026-06 unverdicted novelty 4.0 of 10

    The paper derives analytic circular-polarization signals from photon-axion mixing and uses the blazar S4 0954+65 optical circular-polarization limit to bound g_aγγ around 10^-12 to 10^-11 GeV^-1 for ultralight axion masses.

  3. The SKAO Pulsar Timing Array

    astro-ph.IM 2026-07 accept novelty 3.5 of 10

    An SKAO PTA with ~174 millisecond pulsars can dominate nanohertz GW sensitivity within four years and enable continuous-wave detections plus anisotropy maps of the gravitational-wave background.

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