期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.131103
关键词
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资金
- Vetenskapsradet (Swedish Research Council) [638-2013-8993]
- Oskar Klein Centre for Cosmoparticle Physics
- Swedish Research Council (VR) [2019-02337]
- NWO through the VIDI research program Probing the Genesis of Dark Matter [680-47-5]
- research program The Hidden Universe of Weakly Interacting Particles (NWO Vrije Programma) - Nederlandse Organisatie voor Wetenschappelijk Onderzoek (Dutch Research Council) [680.92.18.03]
- European Union [754496]
- Spanish Agencia Estatal de Investigacion (AEI, MICIU) [MDM-2017-0765]
- SURF Cooperative
Research shows that frequent encounters between QCD axion miniclusters and neutron stars in the Milky Way result in observable radio signals that last from a day to a few months, clustered towards the Galactic Center. This offers a promising pathway for discovering QCD axion dark matter with current generation telescopes.
The QCD axion is expected to form dense structures known as axion miniclusters if the Peccei-Quinn symmetry is broken after inflation. Miniclusters that have survived until today will interact with neutron stars (NSs) in the Milky Way to produce transient radio signals from axion-photon conversion in the NS magnetosphere. We quantify the properties of these encounters and find that they occur frequently [O(1-100)day(-1)], last between a day and a few months, are spatially clustered toward the Galactic Center, and can reach observable fluxes. These radio transients are within reach of current generation telescopes and therefore offer a promising pathway to discovering QCD axion dark matter.
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