Details

Autor(en) / Beteiligte

• Abramowski, A
• Acero, F
• Aharonian, F
• Akhperjanian, A G
• Anton, G
• Balenderan, S
• Balzer, A
• Barnacka, A
• Becherini, Y
• Becker Tjus, J
• Bernlöhr, K
• Birsin, E
• Biteau, J
• Bochow, A
• Boisson, C
• Bolmont, J
• Bordas, P
• Brucker, J
• Brun, F
• Brun, P
• Bulik, T
• Carrigan, S
• Casanova, S
• Cerruti, M
• Chadwick, P M
• Chaves, R C G
• Cheesebrough, A
• Colafrancesco, S
• Cologna, G
• Conrad, J
• Couturier, C
• Dalton, M
• Daniel, M K
• Davids, I D
• Degrange, B
• Deil, C
• deWilt, P
• Dickinson, H J
• Djannati-Ataï, A
• Domainko, W
• Drury, L O'C
• Dubus, G
• Dutson, K
• Dyks, J
• Dyrda, M
• Egberts, K
• Eger, P
• Espigat, P
• Fallon, L
• Farnier, C
• Fegan, S
• Feinstein, F
• Fernandes, M V
• Fernandez, D
• Fiasson, A
• Fontaine, G
• Förster, A
• Füßling, M
• Gajdus, M
• Gallant, Y A
• Garrigoux, T
• Gast, H
• Giebels, B
• Glicenstein, J F
• Glück, B
• Göring, D
• Grondin, M-H
• Häffner, S
• Hague, J D
• Hahn, J
• Hampf, D
• Harris, J
• Heinz, S
• Heinzelmann, G
• Henri, G
• Hermann, G
• Hillert, A
• Hinton, J A
• Hofmann, W
• Hofverberg, P
• Holler, M
• Horns, D
• Jacholkowska, A
• Jahn, C
• Jamrozy, M
• Jung, I
• Kastendieck, M A
• Katarzyński, K
• Katz, U
• Kaufmann, S
• Khélifi, B
• Klepser, S
• Klochkov, D
• Kluźniak, W
• Kneiske, T
• Komin, Nu
• Kosack, K
• Kossakowski, R
• Krayzel, F
• Krüger, P P

Titel

Search for photon-linelike signatures from dark matter annihilations with H.E.S.S

Ist Teil von

• Physical review letters, 2013, Vol.110 (4), p.041301-041301, Article 041301

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

PROLA

Beschreibungen/Notizen

• Gamma-ray line signatures can be expected in the very-high-energy (E(γ)>100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable from astrophysical γ-ray sources that in most cases produce continuous spectra that span over several orders of magnitude in energy. Using data collected with the H.E.S.S. γ-ray instrument, upper limits on linelike emission are obtained in the energy range between ∼ 500 GeV and ∼ 25 TeV for the central part of the Milky Way halo and for extragalactic observations, complementing recent limits obtained with the Fermi-LAT instrument at lower energies. No statistically significant signal could be found. For monochromatic γ-ray line emission, flux limits of (2 × 10(-7) -2 × 10(-5)) m(-2) s(-1) sr(-1) and (1 × 10(-8) -2 × 10(-6)) m(-2) s(-1)sr(-1) are obtained for the central part of the Milky Way halo and extragalactic observations, respectively. For a DM particle mass of 1 TeV, limits on the velocity-averaged DM annihilation cross section ⟨σv⟩(χχ → γγ) reach ∼ 10(-27) cm(3)s(-1), based on the Einasto parametrization of the Galactic DM halo density profile.