Nano-Hz gravitational wave signature from axion dark matter

Kitajima N, Soda J, Urakawa Y (2021)
Physical Review Letters 126(12): 121301.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Kitajima, Naoya; Soda, Jiro; Urakawa, YukoUniBi
Abstract / Bemerkung
We calculate the accurate spectrum of the stochastic gravitational-wave background from U(1) gauge fields produced by axion dark matter. The explosive production of gauge fields soon invalidates the applicability of the linear analysis and one needs nonlinear schemes. We make use of numerical lattice simulations to properly follow the nonlinear dynamics such as backreaction and rescattering which gives important contributions to the emission of gravitational waves. It turns out that the axion with the decay constant f similar to 10(16) GeV and the mass m similar to 10(-14) eV which gives the correct dark matter abundance predicts the circularly polarized gravitational-wave signature detectable by SKA. We also show that the resulting gravitational-wave spectrum has a potential to explain NANOGrav 12.5 yr data.
Erscheinungsjahr
2021
Zeitschriftentitel
Physical Review Letters
Band
126
Ausgabe
12
Art.-Nr.
121301
ISSN
0031-9007
eISSN
1079-7114
Page URI
https://pub.uni-bielefeld.de/record/2949953

Zitieren

Kitajima N, Soda J, Urakawa Y. Nano-Hz gravitational wave signature from axion dark matter. Physical Review Letters. 2021;126(12): 121301.
Kitajima, N., Soda, J., & Urakawa, Y. (2021). Nano-Hz gravitational wave signature from axion dark matter. Physical Review Letters, 126(12), 121301. https://doi.org/10.1103/PhysRevLett.126.121301
Kitajima, N., Soda, J., and Urakawa, Y. (2021). Nano-Hz gravitational wave signature from axion dark matter. Physical Review Letters 126:121301.
Kitajima, N., Soda, J., & Urakawa, Y., 2021. Nano-Hz gravitational wave signature from axion dark matter. Physical Review Letters, 126(12): 121301.
N. Kitajima, J. Soda, and Y. Urakawa, “Nano-Hz gravitational wave signature from axion dark matter”, Physical Review Letters, vol. 126, 2021, : 121301.
Kitajima, N., Soda, J., Urakawa, Y.: Nano-Hz gravitational wave signature from axion dark matter. Physical Review Letters. 126, : 121301 (2021).
Kitajima, Naoya, Soda, Jiro, and Urakawa, Yuko. “Nano-Hz gravitational wave signature from axion dark matter”. Physical Review Letters 126.12 (2021): 121301.

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PMID: 33834830
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arXiv: 2010.10990

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