Cloud-9's gas profile can be fit by both cuspy CDM and cored SIDM halos, but matching cosmological halo concentrations favors SIDM with σ/m ≈ 200 cm²/g at about 3σ tension versus 7σ for CDM.
Commun.Appl.Math.Comput.Sc.5,65–80
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Cold Dark Matter and Self-Interacting Dark Matter Interpretations of Cloud-9
Cloud-9's gas profile can be fit by both cuspy CDM and cored SIDM halos, but matching cosmological halo concentrations favors SIDM with σ/m ≈ 200 cm²/g at about 3σ tension versus 7σ for CDM.