Microhalos and dark matter detection

Aurel Schneider, Lawrence Krauss, Ben Moore

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Cosmological structure formation predicts that our galactic halo contains an enormous hierarchy of substructures and streams, the remnants of the merging hierarchy that began with tiny Earth mass microhalos. If these structures persist until the present time, they could influence dramatically the detection signatures of weakly interacting elementary particle dark matter (WIMP). Using numerical simulations that follow the tidal disruption within the Galactic potential and heating from stellar encounters, we find that neither microhalos nor streams have significant impact on direct detection, implying that dark matter constraints derived using simple smooth halo models are relatively robust. We also find that many dense central cusps survive, yielding a small enhancement in the signal for indirect detection experiments.

Original languageEnglish (US)
Title of host publicationProceedings of Science
StatePublished - 2010
Event8th International Workshop on Identification of Dark Matter, IDM 2010 - Montpellier, France
Duration: Jul 26 2010Jul 30 2010


Other8th International Workshop on Identification of Dark Matter, IDM 2010

ASJC Scopus subject areas

  • General


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