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IceCube search for dark matter annihilation in nearby galaxies and galaxy clusters
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2013 (English)In: Physical Review D, ISSN 1550-7998, Vol. 88, no 12Article in journal (Refereed) Published
Abstract [en]

We present the results of a first search for self-annihilating dark matter in nearby galaxies and galaxy clusters using a sample of high-energy neutrinos acquired in 339.8 days of live time during 2009/10 with the IceCube neutrino observatory in its 59-string configuration. The targets of interest include the Virgo and Coma galaxy clusters, the Andromeda galaxy, and several dwarf galaxies. We obtain upper limits on the cross section as a function of the weakly interacting massive particle mass between 300 GeV and 100 TeV for the annihilation into b (b) over bar, W+(W) over bar (-), tau(+)tau(-), mu(+)mu(-) , and nu(nu) over bar. A limit derived for the Virgo cluster, when assuming a large effect from subhalos, challenges the weakly interacting massive particle interpretation of a recently observed GeV positron excess in cosmic rays.

Place, publisher, year, edition, pages
2013. Vol. 88, no 12
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-215919DOI: 10.1103/PhysRevD.88.122001ISI: 000328604600002OAI: oai:DiVA.org:uu-215919DiVA: diva2:689119
Available from: 2014-01-20 Created: 2014-01-17 Last updated: 2015-06-24Bibliographically approved

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Boersma, David J.Botner, Olgade los Heros, Carlos PerezStröm, RickardTaavola, Henric
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