AI 中文总结
该研究利用Ia型超新星，通过开发运动学框架，考虑参考系变换并选择特定超新星，从光度距离多极推断拉尼亚凯亚的椭球运动学，为其光度距离各向异性提供物理解释，还表明可借此重建本地宇宙大规模结构。
AI 中文摘要
我们开发了一个运动学框架，将光度距离的单极、偶极和四极与描述拉尼亚凯亚超星系团动力学的椭球特殊速度场联系起来。通过适当考虑宇宙微波背景（CMB）和拉尼亚凯亚参考系之间的变换，并在与该超结构相关的体积内选择Ia型超新星，我们表明光度距离多极编码了局部速度场的膨胀和剪切。这使得可以直接从超新星观测中推断出拉尼亚凯亚的椭球运动学。我们的结果为拉尼亚凯亚动态主导体积内的光度距离各向异性提供了基于物理的解释，作为其大规模运动学的特征。这里开发的框架表明，未来的超新星观测能够独立重建本地宇宙中的大规模结构。
英文摘要
We develop a kinematic framework that relates the monopole, dipole, and quadrupole of the luminosity distance to an ellipsoidal peculiar velocity field describing the dynamics of the Laniakea supercluster. By properly accounting for the transformations between the CMB and Laniakea reference frames and selecting Type Ia supernovae within the volume associated with the superstructure, we show that luminosity distance multipoles encode the expansion and shear of the local velocity field. This allows the ellipsoidal kinematics of Laniakea to be inferred directly from supernova observations. Our results provide a physically motivated interpretation of luminosity distance anisotropies within the volume dynamically dominated by Laniakea as signatures of its large-scale kinematics. The framework developed here suggests that future supernova observations can enable the independent reconstruction of large-scale structures in the local Universe
Comments27 pages, 10 figures
