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

Anderson, Brandon; Kuhlen, Michael; Diemand, Jürg; Johnson, Robert P.; Madau, Piero

doi:10.1088/0004-637X/718/2/899

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

Journal Article · Wed Jul 07 00:00:00 EDT 2010 · The Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/718/2/899· OSTI ID:1357540

Anderson, Brandon ^[1]; Kuhlen, Michael ^[2]; Diemand, Jürg ^[3]; Johnson, Robert P. ^[1]; Madau, Piero ^[4]

Univ. of California, Santa Cruz, CA (United States). Santa Cruz Inst. for Particle Physics
Univ. of California, Berkeley, CA (United States). Dept. of Astronomy
Univ. of California, Santa Cruz, CA (United States). Dept. of Astronomy & Astrophysics; Univ. of Zurich (Switzerland). Inst. for Theoretical Physics
Univ. of California, Santa Cruz, CA (United States). Santa Cruz Inst. for Particle Physics; Univ. of California, Santa Cruz, CA (United States). Dept. of Astronomy & Astrophysics

Here, 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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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Aeronautics and Space Administration (NASA)

Grant/Contract Number:: AC02-76SF00515; AC05-00OR22725; HST-AR-11268.01-A1; NNX08AV68G; NNX08AV59G

OSTI ID:: 1357540

Journal Information:: The Astrophysical Journal, Vol. 718, Issue 2; ISSN 0004-637X

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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Dark matter subhaloes as gamma-ray sources and candidates in the first Fermi -LAT catalogue Zechlin, H. -S.; Fernandes, M. V.; Elsässer, D. Astronomy & Astrophysics, Vol. 538 https://doi.org/10.1051/0004-6361/201117655	journal	February 2012
A review of indirect searches for particle dark matter Gaskins, Jennifer M. Contemporary Physics, Vol. 57, Issue 4 https://doi.org/10.1080/00107514.2016.1175160	journal	June 2016
Constraints to Dark Matter Annihilation from High-Latitude HAWC Unidentified Sources Coronado-Blázquez, Javier; Sánchez-Conde, Miguel A. Galaxies, Vol. 8, Issue 1 https://doi.org/10.3390/galaxies8010005	journal	December 2019
Dark matter subhaloes as gamma-ray sources and candidates in the first Fermi-LAT catalogue Zechlin, H. -S.; Fernandes, M. V.; Elsaesser, D. arXiv https://doi.org/10.48550/arxiv.1111.3514	text	January 2011
Search for Dark Matter Satellites using the FERMI-LAT Collaboration, The Fermi LAT; Ackermann, M.; Albert, A. arXiv https://doi.org/10.48550/arxiv.1201.2691	text	January 2012
A review of indirect searches for particle dark matter Gaskins, Jennifer M. arXiv https://doi.org/10.48550/arxiv.1604.00014	text	January 2016
Constraints to dark matter annihilation from high-latitude HAWC unidentified sources Coronado-Blazquez, Javier; Sanchez-Conde, Miguel A. arXiv https://doi.org/10.48550/arxiv.2001.02536	text	January 2020

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