Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure
Abstract
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.
- Authors:
-
- 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
- Publication Date:
- Research Org.:
- 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 Org.:
- USDOE Office of Science (SC); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1357540
- Grant/Contract Number:
- AC02-76SF00515; AC05-00OR22725; HST-AR-11268.01-A1; NNX08AV68G; NNX08AV59G
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 718; Journal Issue: 2; Journal ID: ISSN 0004-637X
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; dark matter; Galaxy structure; gamma rays galaxies
Citation Formats
Anderson, Brandon, Kuhlen, Michael, Diemand, Jürg, Johnson, Robert P., and Madau, Piero. Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure. United States: N. p., 2010.
Web. doi:10.1088/0004-637X/718/2/899.
Anderson, Brandon, Kuhlen, Michael, Diemand, Jürg, Johnson, Robert P., & Madau, Piero. Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure. United States. https://doi.org/10.1088/0004-637X/718/2/899
Anderson, Brandon, Kuhlen, Michael, Diemand, Jürg, Johnson, Robert P., and Madau, Piero. Wed .
"Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure". United States. https://doi.org/10.1088/0004-637X/718/2/899. https://www.osti.gov/servlets/purl/1357540.
@article{osti_1357540,
title = {Fermi-LAT Sensitivity to Dark Matter Annihilation in Via Lactea II Substructure},
author = {Anderson, Brandon and Kuhlen, Michael and Diemand, Jürg and Johnson, Robert P. and Madau, Piero},
abstractNote = {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.},
doi = {10.1088/0004-637X/718/2/899},
journal = {The Astrophysical Journal},
number = 2,
volume = 718,
place = {United States},
year = {Wed Jul 07 00:00:00 EDT 2010},
month = {Wed Jul 07 00:00:00 EDT 2010}
}
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