Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications

Details Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications

2010-01-27

arxiv.org/abs/1001.4836v1

Phys.Rev.Lett.104:091302,2010

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 1 figure. Accepted for publication by The Physical Review Letters

Scientific paper

10.1103/PhysRevLett.104.091302

Dark matter (DM) particle annihilation or decay can produce monochromatic $\gamma$-rays readily distinguishable from astrophysical sources. $\gamma$-ray line limits from 30 GeV to 200 GeV obtained from 11 months of Fermi Large Area Space Telescope data from 20-300 GeV are presented using a selection based on requirements for a $\gamma$-ray line analysis, and integrated over most of the sky. We obtain $\gamma$-ray line flux upper limits in the range $0.6-4.5\times 10^{-9}\mathrm{cm}^{-2}\mathrm{s}^{-1}$, and give corresponding DM annihilation cross-section and decay lifetime limits. Theoretical implications are briefly discussed.

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