The Sculptor dwarf spheroidal is noticeably flattened in projection and hosts at least two chemodynamically distinct stellar populations, with kinematics favoring a cored inner mass profile and only mild rotation (Battaglia 2008; Walker & Peñarrubia 2011; Breddels & Helmi 2013; Read 2019). The inferred profile is inconsistent with the steep cusps generically predicted for low-mass ΛCDM subhalos.
The standard model assumes dwarf spheroidals are embedded in spherical CDM halos that should drive nearly spherical stellar distributions. The observed flattening + cored profile + multi-population structure demands fine-tuning of halo shape, feedback history, and viewing angle, with the inferred DM slope highly sensitive to unknown inclination and anisotropy.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, Sculptor's flattening is a cascade-stream J inheritance signature. The cascade-stream event that produced Sculptor deposited matter with bulk J = μ(b × v_rel) (P22, P25, P31, P32), and the inherited J gives the dwarf its ellipsoidal flattened shape from cascade-stream geometry rather than from late-time tidal stirring.
The multi-population structure (chemodynamically distinct populations) reflects multiple cascade-stage events contributing to Sculptor's progenitor matter, each with slightly different J inheritance and chemical baseline (P25, P28). The cored inner mass profile comes from gravitational superposition (P50, P51, P52, P54): the Φ_mesh contribution provides the gravitational binding without the cuspy CDM particle halo. Sculptor therefore has cored profile (no cuspy CDM) plus inherited flattening (from cascade J) plus multi-population diversity (from cascade-thermalized gas substructure) all from one cascade-stream framework.
The same M3 + M6 framework that produces dwarf-galaxy velocity gradients (recid 133), Carina-style ordered kinematics, Draco's tidal tails (recid 105), and the broader dwarf-spheroidal phenomenology accounts for Sculptor's flattening. There is no need for fine-tuned halo shapes or viewing-angle conspiracies; the flattening reflects real cascade-J inheritance and the cored profile reflects coherent-mesh-not-CDM-particle binding.
If precision Gaia + JWST Sculptor kinematic surveys find the flattening uncorrelated with the broader Local Group cascade-stream J direction at greater than 3σ (no inherited J signature, fully consistent with random-tidal-stirring orientation), the M3 cascade-J inheritance is refuted. The signature SCT prediction is Sculptor's J alignment matching the local cascade-stream parent context.