Interpretation of the Gamma-ray signal from the Galactic center

Horns, D.

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Interpretation of the Gamma-ray signal from the Galactic center

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Horns, D.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Citation

Horns, D. (2005). Interpretation of the Gamma-ray signal from the Galactic center. In F. A. Aharonian, H. J. Völk, & D. (. Horns (Eds.), High Energy Gamma-Ray Astronomy (pp. 416-421). New York, NY: American Institute of Physics.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-898C-B

Abstract

Recent observations of the Galactic center with ground based gamma-ray instruments (CANGAROO-II, VERITAS, H.E.S.S.) have revealed a TeV (10¹²eV) gamma-ray signal consistent with the position of Sgr A*. The observed energy spectrum and angular distribution of the excess could be explained by a massive Dark Matter candidate with a minimum mass of 13 TeV(90 % c.l.) and an upper limit on the WIMP density for r < 10 pc of 1309 M_Θ pc^-3 x ( [σ υ]/3.10^-26cm³s^-1)^-1/2. The angular distribution of the excess events is consistent with a cuspy profile with ρ (r)^-∝ with α > 1 at a confidence level of 90%. Even though the mass and the cross section of the dark Matter constituents are unexpectedly high in the framework of most models of nonbaryonic Dark Matter, it can be ruled out.