Detection of CDM substructure

N. Dalal, C. S. Kochanek

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)144-147
Number of pages4
JournalNuclear Physics B - Proceedings Supplements
StatePublished - Jul 2003
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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