Galactic Substructure and Energetic Neutrinos from the Sun and Earth

Savvas M. Koushiappas and Marc Kamionkowski
Phys. Rev. Lett. 103, 121301 – Published 14 September 2009

Abstract

We consider the effects of Galactic substructure on energetic neutrinos from annihilation of weakly interacting massive particles that have been captured by the Sun and Earth. Substructure gives rise to a time-varying capture rate and thus to time variation in the annihilation rate and resulting energetic-neutrino flux. However, there may be a time lag between the capture and annihilation rates. The energetic-neutrino flux may then be determined by the density of dark matter in the Solar System’s past trajectory, rather than the local density. The signature of such an effect may be sought in the ratio of the direct- to indirect-detection rates.

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  • Received 28 July 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.121301

©2009 American Physical Society

Authors & Affiliations

Savvas M. Koushiappas1 and Marc Kamionkowski2

  • 1Department of Physics, Brown University, 182 Hope Street, Providence, Rhode Island 02912, USA*
  • 2California Institute of Technology, Mail Code 350-17, Pasadena, California 91125, USA†

  • *koushiappas@brown.edu
  • kamion@tapir.caltech.edu

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Vol. 103, Iss. 12 — 18 September 2009

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