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Dark Matter signals from Draco and Willman 1: Prospects for MAGIC II and CTA
Stockholm University, Faculty of Science, Department of Physics. (The Oskar Klein Centre for Cosmoparticle Physics)
Padova Univ.
IAP, Paris.
2009 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, Vol. 01, no 016Article in journal (Refereed) Published
Abstract [en]

The next generation of ground-based Imaging Air Cherenkov Telescopes (IACTs) will play an important role in indirect dark matter searches. In this article, we consider two particularly promising candidate sources for dark matter annihilation signals, the nearby dwarf galaxies Draco and Willman 1, and study the prospects of detecting such a signal for the soon-operating MAGIC II telescope system as well as for the planned installation of CTA, taking special care of describing the experimental features that affect the detectional prospects. For the first time in such a study, we fully take into account the effect of internal bremsstrahlung, which has recently been shown to considerably enhance, in some cases, the gamma-ray flux at the high energies where Atmospheric Cherenkov Telescopes operate, thus leading to significantly harder annihilation spectra than traditionally considered. While the detection of the spectral features introduced by internal bremsstrahlung would constitute a smoking gun signature for dark matter annihilation, we find that for most models the overall flux still remains at a level that will be challenging to detect unless one adopts rather (though by no means overly) optimistic astrophysical assumptions about the distribution of dark matter in the dwarfs

Place, publisher, year, edition, pages
2009. Vol. 01, no 016
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-32508ISI: 000263824000016OAI: diva2:280770
Available from: 2010-01-25 Created: 2009-12-11 Last updated: 2010-01-25Bibliographically approved

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