模糊暗物质波动模拟的引力透镜预测
Gravitational Lensing Predictions from Wave Simulations of Fuzzy Dark Matter
- School of Physics and Astronomy, Beijing Normal University（北京师范大学物理学院）
- Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University（北京师范大学前沿天文与天体物理研究所）
- Department of Physics, The University of Hong Kong（香港大学物理系）
- The Hong Kong Institute for Astronomy and Astrophysics, The University of Hong Kong（香港大学天文与天体物理研究所）
- Department of Astronomy, Tsinghua University（清华大学天文系）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
研究通过求解薛定谔 - 泊松方程的波动模拟预测引力透镜图像属性，利用新框架投影密度场获取透镜图像位置扰动分布，发现质量\(10^{-22}\) eV粒子能更好重现四重透镜射电喷流位置，凸显波动模拟对FDM透镜预测及探测暗物质性质的重要性。
AI中文摘要：
在冷暗物质范式中，超轻粒子成为传统大质量粒子的有力竞争者。由超轻粒子构成的模糊暗物质（FDM）有独特预测，因其波干涉会在星系晕中产生强密度调制。本文首次通过直接求解薛定谔 - 泊松方程的波动模拟预测引力透镜图像属性。利用新框架沿三维晕轴投影密度场，得到透镜图像位置扰动分布。发现质量为\(10^{-22}\) eV的粒子能更好地重现HS 0810 + 2554系统中四重透镜射电喷流的位置。研究凸显波动模拟对精确FDM透镜预测的重要性及透镜系统高分辨率观测探测暗物质性质的潜力。
英文摘要：
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.
