Visualization of Slow Spatiotemporal Correlated Structures Around a Spherical Object

Previous studies demonstrated that weak optical fluctuations surrounding suspended metallic spheres exhibit mass-dependent temporal persistence and spatially extended statistical correlations under broadband incoherent illumination. The present study extends these observations by investigating whether such weak correlated structures exhibit measurable source-centered local spatiotemporal organization. Using time-resolved image sequences, local texture patches were analyzed using a source-centered patch-based cross-correlation drift framework. Statistically selected local radial drift events were extracted through predefined texture, correlation, displacement, and radial-alignment criteria, enabling quantitative characterization of their source-centered spatial distributions. The analysis revealed large populations of inward- and outward-directed local radial drift events distributed throughout the accessible observation region. These populations exhibited measurable source-centered spatial organization characterized by extension across multiple radial shells, broad angular coverage, and locally varying inward/outward directional composition. Radial drift populations were detected in both the tungsten-sphere and null-control conditions; however, the tungsten-sphere condition exhibited a substantially larger drift population and a more continuous spatial distribution across radial and angular regions. These results provide a complementary spatial and dynamical description of the mass-dependent temporal persistence and extended spatial correlations reported in the preceding studies. Taken together, the observations support a phenomenological picture involving mass dependence, spatial extension, and structured source-centered radial drift dynamics embedded within a stochastic optical background. Although the present observations do not constitute direct evidence of gravitational-wave tails, the identified characteristics exhibit qualitative similarities to slowly evolving, spatially distributed delayed-response structures associated with gravitational-wave tail phenomena. The present approach therefore provides an experimental framework for quantitatively characterizing weak source-centered spatiotemporal organization within stochastic optical fluctuations.