Detecting Extragalactic Axion-like Dark Matter with Polarization Measurements of Fast Radio Bursts
| Autor: | Wang, Bao, Yang, Xuan, Wei, Jun-Jie, Zhang, Song-Bo, Wu, Xue-Feng |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Axions or axion-like particles (ALPs) are one of the most promising candidates of dark matter (DM). A prevalent method to detect axion-like DM is to seek the periodic oscillation feature in the polarization angles of linearly polarized light emitted from astrophysical sources. In this work, we use the time-resolved polarization measurements of the hyperactive repeating fast radio burst, FRB 20220912A, detected by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to search for extragalactic axion-like DM for the first time. Given a DM density profile of FRB 20220912A's host, we obtain upper limits on the ALP-photon coupling constant of $g_{a \gamma}<(2.9 \times 10^{-11}-1.1\times 10^{-9})\,\mathrm{GeV}^{-1}$ for the ALP masses $m_a \sim (1.4\times10^{-21}-5.2\times10^{-20})$ eV. Persistent polarimetric observations with FAST would further improve the constraints. We prove that FRBs offer an alternative way to detect axion-like DM on extragalactic distance scales, complementary to other galactic DM probes. Comment: 7 pages, 2 figures |
| Databáze: | arXiv |
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