Is one dark-matter self-interaction law compatible with both dwarf galaxies and clusters?
Public summary of an internal test, not yet independently validated or published.
Question investigated
Is one dark-matter self-interaction law compatible with both dwarf galaxies and clusters?
Test conditions
The method expresses public constraints from dwarf galaxies, groups and clusters through a common velocity-dependent law. The full comparison requires propagation of baryonic and halo uncertainties, joint analysis and exclusion of each probe.
Result
The partial comparison was compatible with the interaction family examined, but one required class of observations was not included. Compatibility with the full set of probes remains undetermined.
Physical interpretation
The test considers a simple family of velocity-dependent interactions, seeking compatibility with strong interactions in dwarf galaxies and weak interactions in clusters. Its scope does not cover all microphysical possibilities or baryonic effects.