Volume 424, Number 3, September IV 2004
|Page(s)||765 - 772|
|Section||Cosmology (including clusters of galaxies)|
|Published online||06 September 2004|
Gamma ray signatures from Galactic neutralino annihilation
Dipartimento di Fisica “Enrico Fermi”, Università di Pisa, via F. Buonarroti 2, Pisa 56127, Italy
2 Dipartimento di Fisica, Università di Siena, via Roma 56, Siena 53100, Italy
3 Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, via F. Buonarroti 2, Pisa 56127, Italy e-mail: firstname.lastname@example.org
Accepted: 26 May 2004
Direct observations of cosmic photon spectra from neutralino annihilation at energies above EGRET data might reveal the presence of weakly interacting massive particle (WIMP) dark matter in the Universe. Calculations of the rates for the continuum γ channel and γ-ray line are reviewed. Both the continuum γ-ray spectrum and the γ-ray line arising from neutralino annihilation are studied. Flux estimates are inherently model-dependent; they suffer from uncertainties due to the large allowed ranges in supersymmetrical parameter-space and from a variety of astrophysical models of the dark matter halo profiles. Our analysis allows detection predictions for orbital and ground-based experiments. As an application, we investigate the number of signal events expected to be detected in an orbital experiment (AMS-02) and we make a comparison with atmospheric Cerenkov telescopes.
Key words: cosmology: dark matter / cosmology: miscellaneous
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.