Gravitational Lensing Predictions from Wave Simulations of Fuzzy Dark Matter

[2607.20614] Gravitational Lensing Predictions from Wave Simulations of Fuzzy Dark Matter Skip to main content Search Submit Donate Log in Astrophysics > Cosmology and Nongalactic Astrophysics arXiv:2607.20614 (astro-ph) [Submitted on 22 Jul 2026 ( v1 ), last revised 16 Sep 2026 (this version, v3)] Title: Gravitational Lensing Predictions from Wave Simulations of Fuzzy Dark Matter Authors: Jiajun Zhou , Zhengxiang Li , Amruth Alfred , Ran Gao , Jeremy Lim , Zong-Hong Zhu View PDF HTML (experimental) Abstract: In the cold dark matter paradigm, ultra-light particles are emerging as strong contenders to conventional massive particles. A unique prediction of dark matter comprising such ultra-light particles, known as fuzzy dark matter (FDM), is the presence of strong density modulations throughout galactic halos due to wave interference, which -- when approximated by a Gaussian random field (GRF) -- have been proposed to account for the inability to reproduce the observed positions (when measured at sufficient precisions) and flux ratios of multiply-lensed images of quasars. Here, we predict for the first time the properties of gravitationally lensed images generated from 3-D density fields obtained by wave simulations that directly evolve the Schrödinger--Poisson equations. Using a novel framework to project these evolved density fields along various axes of the 3-D halo, we obtain the distribution of perturbations to the positions of lensed images. As an exacting test, we find that particles of mass $10^{-22}$ eV can reproduce the positions of the quadruply-lensed radio jets in system HS 0810+2554 to a level better than that of either the GRF approximation or, to a greater extent, an NFW best-fit solution, both of which rely on accurately capturing the global 3-D density field of dark matter halos. Our work highlights the importance of wave simulations for making accurate FDM lensing predictions and the potential for high-resolution observations of lensed systems to serve as a direct probe of the nature of dark matter. Comments: 18 pages, 9 figures; Published in this http URL 1008, Number 2. Comments are welcome Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO) Cite as: arXiv:2607.20614 [astro-ph.CO] (or arXiv:2607.20614v3 [astro-ph.CO] for this version) https://doi.org/10.48550/arXiv.2607.20614 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Astrophys. J. Lett. 1008, L58 (2026) Related DOI : https://doi.org/10.3847/2041-8213/ae9a9e Focus to learn more DOI(s) linking to related resources Submission history From: Jiajun Zhou [ view email ] [v1] Wed, 22 Jul 2026 18:00:01 UTC (972 KB) [v2] Fri, 21 Aug 2026 18:00:01 UTC (973 KB) [v3] Wed, 16 Sep 2026 18:00:01 UTC (973 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: astro-ph.CO < prev | next > new | recent | 2026-07 Change to browse by: astro-ph References & Citations INSPIRE HEP SciX Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. 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