Rogers, KK;
Peiris, H;
(2021)
Strong Bound on Canonical Ultralight Axion Dark Matter from the Lyman-Alpha Forest.
Physical Review Letters
, 126
(7)
, Article 071302. 10.1103/PhysRevLett.126.071302.
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Abstract
We present a new bound on the ultralight axion (ULA) dark matter mass m a , using the Lyman-alpha forest to look for suppressed cosmic structure growth: a 95% lower limit m a > 2 × 10 − 20 eV . This strongly disfavors ( > 99.7 % credibility) the canonical ULA with 10 − 22 eV < m a < 10 − 21 eV , motivated by the string axiverse and solutions to possible tensions in the cold dark matter model. We strengthen previous equivalent bounds by about an order of magnitude. We demonstrate the robustness of our results using an optimized emulator of improved hydrodynamical simulations.
| Type: | Article |
|---|---|
| Title: | Strong Bound on Canonical Ultralight Axion Dark Matter from the Lyman-Alpha Forest |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.126.071302 |
| Publisher version: | https://doi.org/10.1103/PhysRevLett.126.071302 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by Bibsam. |
| Keywords: | Cosmology, Dark matter, Large scale structure of the Universe, Particle dark matter |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10123129 |
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