Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/117523
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Type: Journal article
Title: Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.
Author: Cirelli, M.
Panci, P.
Sala, F.
Silk, J.
Taoso, M.
Abdalla, H.
Aharonian, F.
Benkhali, F.
Angüner, E.
Arakawa, M.
Arcaro, C.
Armand, C.
Arrieta, M.
Backes, M.
Barnard, M.
Becherini, Y.
Tjus, J.
Berge, D.
Bernhard, S.
Bernlöhr, K.
et al.
Citation: Journal of Cosmology and Astroparticle Physics, 2018; 2018(11):037-1-037-22
Publisher: IOP Publishing
Issue Date: 2018
ISSN: 1475-7516
1475-7516
Statement of
Responsibility: 
H. Abdalla, F. Aharonian, F. Ait Benkhali, E.O. Angüner, M. Arakawa ... Gavin P. Rowell ... et al.
Abstract: Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about lang σ v rang lesssim 3 × 10−25 cm3 s−1 are obtained in the mass range of 400 GeV to 1 TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.
Keywords: Dark matter detectors; dark matter experiments; dwarfs galaxies; gamma ray detectors
Rights: © 2018 IOP Publishing Ltd and Sissa Medialab
RMID: 0030105270
DOI: 10.1088/1475-7516/2018/11/037
Appears in Collections:Physics publications

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