The properties of multiple image gravitational lenses require a fractional surface mass density in satellites of fsat = 0.02 (0.006 ≲ fsat ≲ 0.07 at 90% confidence) that is consistent with the expectations for CDM. The characteristic satellite mass scale, 106-109 M⊙, is also consistent with the expectations for CDM. The agreement between the observed and expected density of CDM substructure supports the basic CDM paradigm, and disfavors modifications to the CDM theory such as self-interacting dark matter or a warm dark matter component.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics