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- W3014398834 abstract "Axion dark matter (DM) may convert to radio-frequency electromagnetic radiation in the strong magnetic fields around neutron stars. The radio signature of such a process would be an ultranarrow spectral peak at a frequency determined by the mass of the axion particle. We analyze data we collected from the Robert C. Byrd Green Bank Telescope in the L band and the Effelsberg 100-m Telescope in the L band and S band from a number of sources expected to produce bright signals of axion-photon conversion, including the Galactic center of the Milky Way and the nearby isolated neutron stars RX J0720.4-3125 and RX J0806.4-4123. We find no evidence for axion DM and are able to set constraints on the existence of axion DM in the highly motivated mass range between ∼5 and 11 μeV with the strongest constraints to date on axions in the ∼10–11 μeV range.Received 14 May 2020Revised 26 July 2020Accepted 17 September 2020DOI:https://doi.org/10.1103/PhysRevLett.125.171301© 2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasDark matterRadio, microwave, & sub-mm astronomyPhysical SystemsAxionsNeutron stars & pulsarsGravitation, Cosmology & AstrophysicsParticles & Fields" @default.
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- W3014398834 date "2020-10-20" @default.
- W3014398834 modified "2023-10-18" @default.
- W3014398834 title "Green Bank and Effelsberg Radio Telescope Searches for Axion Dark Matter Conversion in Neutron Star Magnetospheres" @default.
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- W3014398834 doi "https://doi.org/10.1103/physrevlett.125.171301" @default.
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