Stochastic Ultralight Dark Matter Fluctuations in Pulsar Timing Arrays
Abstract: Metric perturbations induced by ultralight dark matter (ULDM) fields have long been identified as a potential target for pulsar timing array (PTA) observations. Previous works have focused on the coherent oscillation of metric perturbations at the characteristic frequency set by the ULDM mass. In this work, we show that ULDM fields source low-frequency stochastic metric fluctuations and that these low-frequency fluctuations can produce distinctive detectable signals in PTA data. Using the NANOGrav 12.5-year data set and synthetic data sets mimicking present and future PTA capabilities, we show that the current and future PTA observations provide the strongest probe of ULDM density within the solar system for masses in the range of $10{-18}\;{\rm eV}-10{-16}\;{\rm eV}$.
- G. Agazie et al. (NANOGrav), Astrophys. J. Lett. 951, L8 (2023a), arXiv:2306.16213 [astro-ph.HE] .
- J. Antoniadis et al., (2023), arXiv:2306.16214 [astro-ph.HE] .
- D. J. Reardon et al., Astrophys. J. Lett. 951, L6 (2023), arXiv:2306.16215 [astro-ph.HE] .
- H. Xu et al., Res. Astron. Astrophys. 23, 075024 (2023), arXiv:2306.16216 [astro-ph.HE] .
- A. Khmelnitsky and V. Rubakov, JCAP 02, 019 (2014), arXiv:1309.5888 [astro-ph.CO] .
- A. Afzal et al. (NANOGrav), Astrophys. J. Lett. 951, L11 (2023), arXiv:2306.16219 [astro-ph.HE] .
- H. Kim, JCAP 12, 018 (2023), arXiv:2306.13348 [hep-ph] .
- J. I. Read, J. Phys. G 41, 063101 (2014), arXiv:1404.1938 [astro-ph.GA] .
- P. F. de Salas and A. Widmark, Rept. Prog. Phys. 84, 104901 (2021), arXiv:2012.11477 [astro-ph.GA] .
- M. F. Alam et al. (NANOGrav), Astrophys. J. Suppl. 252, 4 (2021), arXiv:2005.06490 [astro-ph.HE] .
- N. P. Pitjev and E. V. Pitjeva, Astron. Lett. 39, 141 (2013), arXiv:1306.5534 [astro-ph.EP] .
- H. Kim and A. Lenoci, Phys. Rev. D 105, 063032 (2022), arXiv:2112.05718 [hep-ph] .
- J. Binney and M. Merrifield, Galactic Astronomy (1998).
- R. w. Hellings and G. s. Downs, Astrophys. J. Lett. 265, L39 (1983).
- A. D. Johnson et al. (NANOGrav), (2023), arXiv:2306.16223 [astro-ph.HE] .
- J. A. Ellis, M. Vallisneri, S. R. Taylor, and P. T. Baker, “ENTERPRISE: Enhanced Numerical Toolbox Enabling a Robust PulsaR Inference SuitE,” Astrophysics Source Code Library, record ascl:1912.015 (2019), ascl:1912.015 .
- J. A. Ellis, M. Vallisneri, S. R. Taylor, and P. T. Baker, “Enterprise: Enhanced numerical toolbox enabling a robust pulsar inference suite,” Zenodo (2020).
- A. Chalumeau et al. (EPTA), Mon. Not. Roy. Astron. Soc. 509, 5538 (2021), arXiv:2111.05186 [astro-ph.HE] .
- Z. Arzoumanian et al. (NANOGrav), Astrophys. J. Lett. 905, L34 (2020), arXiv:2009.04496 [astro-ph.HE] .
- B. Goncharov et al., Astrophys. J. Lett. 917, L19 (2021), arXiv:2107.12112 [astro-ph.HE] .
- B. B. P. Perera et al., Mon. Not. Roy. Astron. Soc. 490, 4666 (2019), arXiv:1909.04534 [astro-ph.HE] .
- J. Ellis and R. van Haasteren, “jellis18/ptmcmcsampler: Official release,” (2017).
- M. Vallisneri, “libstempo: Python wrapper for Tempo2,” Astrophysics Source Code Library, record ascl:2002.017 (2020), ascl:2002.017 .
- G. Agazie et al. (NANOGrav), Astrophys. J. Lett. 951, L9 (2023b), arXiv:2306.16217 [astro-ph.HE] .
- S. L. Adler, J. Phys. A 41, 412002 (2008), arXiv:0808.0899 [astro-ph] .
- A. Derevianko, Phys. Rev. A 97, 042506 (2018), arXiv:1605.09717 [physics.atom-ph] .
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