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Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure


Anderson, B; Kuhlen, M; Diemand, J; Johnson, R P; Madau, P (2010). Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure. Astrophysical Journal, 718(2):899-904.

Abstract

We present a study of the ability of the Fermi Gamma-ray Space Telescope to detect dark matter (DM) annihilation signals from the Galactic subhalos predicted by the Via Lactea II N-body simulation. We implement an improved formalism for estimating the boost factor needed to account for the effect of DM clumping on scales below the resolution of the simulation, and we incorporate a detailed Monte Carlo simulation of the response of the Fermi-LAT, including a simulation of its all-sky observing mode integrated over a 10 year mission. We find that for WIMP masses up to about 150 GeV c -2 in standard supersymmetric models with langσvrang = 3 × 10-26 cm3 s-1, a few subhalos could be detectable with >5 standard deviation significance and would likely deviate significantly from the appearance of a point source.

Abstract

We present a study of the ability of the Fermi Gamma-ray Space Telescope to detect dark matter (DM) annihilation signals from the Galactic subhalos predicted by the Via Lactea II N-body simulation. We implement an improved formalism for estimating the boost factor needed to account for the effect of DM clumping on scales below the resolution of the simulation, and we incorporate a detailed Monte Carlo simulation of the response of the Fermi-LAT, including a simulation of its all-sky observing mode integrated over a 10 year mission. We find that for WIMP masses up to about 150 GeV c -2 in standard supersymmetric models with langσvrang = 3 × 10-26 cm3 s-1, a few subhalos could be detectable with >5 standard deviation significance and would likely deviate significantly from the appearance of a point source.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:August 2010
Deposited On:01 Mar 2011 13:45
Last Modified:05 Apr 2016 14:33
Publisher:Institute of Physics Publishing
ISSN:0004-637X
Publisher DOI:https://doi.org/10.1088/0004-637X/718/2/899
Related URLs:http://arxiv.org/abs/1006.1628

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