Abstract
The standard model of cosmology indicates that approximately 27% of the energy density of the Universe is in the form of dark matter. The nature of dark matter is an open question in modern physics. Indirect dark matter searches with imaging atmospheric Cherenkov telescopes are playing a crucial role in constraining the nature of the dark matter particle through the study of their potential annihilation that could produce very high energy gamma rays from different astrophysical structures. The Cherenkov Telescope Array will provide an unprecedented sensitivity over a range of dark matter mass from ~100 GeV to ~30 TeV. In this contribution we review the status of indirect dark matter searches at dwarf spheroidal galaxies.
Highlights
The existence of dark matter (DM) in our Universe (27% of the total energy) is well established, but its nature is still unknown
The goal of the present study is to provide preliminary comparative expectations on indirect DM searches with the Cherenkov Telescope Array [5], taking into account continuum gamma-ray signatures coming from typical DM annihilation channels
The Cherenkov Telescope Array will improve the sensitivity to DM annihilation for a range of interesting DM masses
Summary
The existence of dark matter (DM) in our Universe (27% of the total energy) is well established, but its nature is still unknown. Among the most promising particle candidates are Weakly Interacting Massive Particles (WIMPs), which typically can self-annihilate and generate gamma rays [1, 2]. If WIMPs particles are produces thermally in the early Universe the self-annihilation cross-section has a natural value of approximately 3×10−26cm3s−1 [3]. WIMPs models, such as the supersymmetric neutralino give prediction the for gamma-ray energy spectra from the annihilations, which are crucial inputs, together with the DM distribution in the observed target, to achieve prospects for the sensitivity of indirect searches [4]. The goal of the present study is to provide preliminary comparative expectations on indirect DM searches with the Cherenkov Telescope Array [5], taking into account continuum gamma-ray signatures coming from typical DM annihilation channels
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