Koushiappas, Savvas M. and Kamionkowski, Marc (2009) Galactic Substructure and Energetic Neutrinos from the Sun and Earth. Physical Review Letters, 103 (12). Art. No. 121301. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20091013-091141467
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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.
|Additional Information:||©2009 The American Physical Society. Received 28 July 2009; published 14 September 2009. We acknowledge useful conversations with J. Beacom, I. Dell’Antonio, R. Gaitskell, A. Geringer-Sameth, G. Jungman, L. Strigari, and A. Zentner. S.M.K. thanks the Caltech/JPL W. M. Keck Institute for Space Studies for hospitality during the preparation of this Letter. The work of M. K. was supported by DoE No. DE-FG03-92-ER40701 and the Gordon and Betty Moore Foundation.|
|Classification Code:||PACS: # 95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological) # 95.85.Ry Neutrino, muon, pion, and other elementary particle astronomical observations; cosmic rays # 98.35.Pr Solar neighborhood|
|Official Citation:||Galactic Substructure and Energetic Neutrinos from the Sun and Earth Savvas M. Koushiappas and Marc Kamionkowski, Phys. Rev. Lett. 103, 121301 (2009), DOI:10.1103/PhysRevLett.103.121301|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||George Porter|
|Deposited On:||13 Oct 2009 20:19|
|Last Modified:||26 Dec 2012 11:27|
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