Limits on Self-Interacting Dark Matter from Neutron Stars

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We impose new severe constraints on the self-interactions of fermionic asymmetric dark matter based on observations of nearby old neutron stars. Weakly interacting massive particle (WIMP) self-interactions mediated by Yukawa-type interactions can lower significantly the number of WIMPs necessary for gravitational collapse of the WIMP population accumulated in a neutron star. Even nearby neutron stars located at regions of low dark matter density can accrete a sufficient number of WIMPs that can potentially collapse, form a mini black hole, and destroy the host star. Based on this, we derive constraints on the WIMP self-interactions which in some cases are by several orders of magnitude stricter than the ones from the bullet cluster.
Original languageEnglish
JournalPhysical Review Letters
Volume108
Issue number19
Pages (from-to)191301
ISSN0031-9007
DOIs
Publication statusPublished - 2012

Cite this