Dark matter model selection and the ATIC/PPB-BETS anomaly
Abstract
We argue that we may be able to sort out dark matter models in which electrons are generated through the annihilation and/or decay of dark matter, by using a fact that the initial energy spectrum is reflected in the cosmic-ray electron flux observed at the Earth even after propagation through the Galactic magnetic field. To illustrate our idea we focus on three representative initial spectra: monochromatic, flat and double-peak ones. We find that those three cases result in significantly different energy spectra, which may be probed by the Fermi satellite in operation or an up-coming cosmic-ray detector such as CALET.
- Publication:
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Journal of Cosmology and Astroparticle Physics
- Pub Date:
- May 2009
- DOI:
- 10.1088/1475-7516/2009/05/015
- arXiv:
- arXiv:0812.4200
- Bibcode:
- 2009JCAP...05..015C
- Keywords:
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- Astrophysics
- E-Print:
- 19 pages, 8 figures