Search for γ -Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with H.E.S.S
Journal
Date Issued
2018
Author(s)
Abdallah, H.
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Abramowski, A.
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Aharonian, F.
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Ait Benkhali, F.
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Angüner, E. O.
•
Arakawa, M.
•
Arrieta, M.
•
Aubert, P.
•
Backes, M.
•
Balzer, A.
•
Barnard, M.
•
Katarzyński, K.
•
Katsuragawa, M.
•
Katz, U.
•
Kerszberg, D.
•
Khangulyan, D.
•
Khélifi, B.
•
King, J.
•
Klepser, S.
•
Klochkov, D.
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Kluźniak, W.
•
Becherini, Y.
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Komin, Nu.
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Kosack, K.
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Krakau, S.
•
Kraus, M.
•
Krüger, P. P.
•
Laffon, H.
•
Lamanna, G.
•
Lau, J.
•
Lees, J. -P.
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Lefaucheur, J.
•
Becker Tjus, J.
•
Lemière, A.
•
Lemoine-Goumard, M.
•
Lenain, J. -P.
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Leser, E.
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Liu, R.
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Lohse, T.
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Lorentz, M.
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López-Coto, R.
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Lypova, I.
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Malyshev, D.
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Berge, D.
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Marandon, V.
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Marcowith, A.
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Mariaud, C.
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Marx, R.
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Maurin, G.
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Maxted, N.
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Mayer, M.
•
Meintjes, P. J.
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Meyer, M.
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Mitchell, A. M. W.
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Bernhard, S.
•
Moderski, R.
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Mohamed, M.
•
Mohrmann, L.
•
Morâ, K.
•
Moulin, E.
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Murach, T.
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Nakashima, S.
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de Naurois, M.
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Ndiyavala, H.
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Niederwanger, F.
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Bernlöhr, K.
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Niemiec, J.
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Oakes, L.
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O'Brien, P.
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Odaka, H.
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Ohm, S.
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Ostrowski, M.
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Oya, I.
•
•
Panter, M.
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Parsons, R. D.
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Blackwell, R.
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Pekeur, N. W.
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Pelletier, G.
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Perennes, C.
•
Petrucci, P. -O.
•
Peyaud, B.
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Piel, Q.
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Pita, S.
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Poireau, V.
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Poon, H.
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Prokhorov, D.
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Böttcher, M.
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Prokoph, H.
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Pühlhofer, G.
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Punch, M.
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Quirrenbach, A.
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Raab, S.
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Rauth, R.
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Reimer, A.
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Reimer, O.
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Renaud, M.
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de los Reyes, R.
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Boisson, C.
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Rieger, F.
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Rinchiuso, L.
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Romoli, C.
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Rowell, G.
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Rudak, B.
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Rulten, C. B.
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Sahakian, V.
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Saito, S.
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Sanchez, D. A.
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Santangelo, A.
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Bolmont, J.
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Sasaki, M.
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Schandri, M.
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Schlickeiser, R.
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Schüssler, F.
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Schulz, A.
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Schwanke, U.
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Schwemmer, S.
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Seglar-Arroyo, M.
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Settimo, M.
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Seyffert, A. S.
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Bonnefoy, S.
•
Shafi, N.
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Shilon, I.
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Shiningayamwe, K.
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Simoni, R.
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Sol, H.
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Spanier, F.
•
Spir-Jacob, M.
•
Stawarz, Ł.
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Steenkamp, R.
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Stegmann, C.
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Bordas, P.
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Steppa, C.
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Sushch, I.
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Takahashi, T.
•
Tavernet, J. -P.
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Tavernier, T.
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Taylor, A. M.
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Terrier, R.
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Tibaldo, L.
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Tiziani, D.
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Tluczykont, M.
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Bregeon, J.
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Trichard, C.
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Tsirou, M.
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Tsuji, N.
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Tuffs, R.
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Uchiyama, Y.
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van der Walt, J.
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van Eldik, C.
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van Rensburg, C.
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van Soelen, B.
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Vasileiadis, G.
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Brun, F.
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Veh, J.
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Venter, C.
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Viana, A.
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Vincent, P.
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Vink, J.
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Voisin, F.
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Völk, H. J.
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Vuillaume, T.
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Wadiasingh, Z.
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Wagner, S. J.
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Brun, P.
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Wagner, P.
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Wagner, R. M.
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White, R.
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Wierzcholska, A.
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Willmann, P.
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Wörnlein, A.
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Wouters, D.
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Yang, R.
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Zaborov, D.
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Zacharias, M.
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Bryan, M.
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Zanin, R.
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Zdziarski, A. A.
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Zech, A.
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Zefi, F.
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Ziegler, A.
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Zorn, J.
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Żywucka, N.
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H. E. S. S. Collaboration
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Büchele, M.
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Bulik, T.
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Capasso, M.
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Caroff, S.
•
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Carr, J.
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Casanova, S.
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Cerruti, M.
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Chakraborty, N.
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Chaves, R. C. G.
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Chen, A.
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Chevalier, J.
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Colafrancesco, S.
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Condon, B.
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Conrad, J.
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Davids, I. D.
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Decock, J.
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Deil, C.
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Devin, J.
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deWilt, P.
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Dirson, L.
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Djannati-Ataï, A.
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Domainko, W.
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Donath, A.
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Drury, L. O'C.
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Dutson, K.
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Dyks, J.
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Edwards, T.
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Egberts, K.
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Eger, P.
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Emery, G.
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Ernenwein, J. -P.
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Eschbach, S.
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Farnier, C.
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Fegan, S.
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Fernandes, M. V.
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Fiasson, A.
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Fontaine, G.
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Förster, A.
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Funk, S.
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Füßling, M.
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Gabici, S.
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Gallant, Y. A.
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Garrigoux, T.
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Gaté, F.
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Giavitto, G.
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Giebels, B.
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Glawion, D.
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Glicenstein, J. F.
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Gottschall, D.
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Grondin, M. -H.
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Hahn, J.
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Haupt, M.
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Hawkes, J.
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Heinzelmann, G.
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Henri, G.
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Hermann, G.
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Hinton, J. A.
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Hofmann, W.
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Hoischen, C.
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Holch, T. L.
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Holler, M.
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Horns, D.
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Ivascenko, A.
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Iwasaki, H.
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Jacholkowska, A.
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Jamrozy, M.
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Janiak, M.
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Jankowsky, D.
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Jankowsky, F.
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Jingo, M.
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Jouvin, L.
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Jung-Richardt, I.
•
Kastendieck, M. A.
Abstract
Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. We report on a search for a monoenergetic spectral line from self-annihilations of DM particles in the energy range from 300 GeV to 70 TeV using a two-dimensional maximum likelihood method taking advantage of both the spectral and spatial features of the signal versus background. The analysis makes use of Galactic center observations accumulated over ten years (2004-2014) with the H.E.S.S. array of ground-based Cherenkov telescopes. No significant γ -ray excess above the background is found. We derive upper limits on the annihilation cross section ⟨σ v ⟩ for monoenergetic DM lines at the level of 4 ×10-28 cm3 s-1 at 1 TeV, assuming an Einasto DM profile for the Milky Way halo. For a DM mass of 1 TeV, they improve over the previous ones by a factor of 6. The present constraints are the strongest obtained so far for DM particles in the mass range 300 GeV-70 TeV. Ground-based γ -ray observations have reached sufficient sensitivity to explore relevant velocity-averaged cross sections for DM annihilation into two γ -ray photons at the level expected from the thermal relic density for TeV DM particles.
Volume
120
Issue
20
Start page
201101
Issn Identifier
0031-9007
Ads BibCode
2018PhRvL.120t1101A
Rights
open.access
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