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https://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.A. Angüner, E.O. Arakawa, M. Arcaro, C. Armand, C. Arrieta, M. Backes, M. Barnard, M. Becherini, Y. Tjus, J.B. 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 |
DOI: | 10.1088/1475-7516/2018/11/037 |
Published version: | http://dx.doi.org/10.1088/1475-7516/2018/11/037 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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