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Title: Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with HESS
Authors: Abdalla, H
Aharonian, F
Benkhali, FA
Anguner, EO
Arakawa, M
Arcaro, C
Armand, C
Arrieta, M
Backes, M
Barnard, M
Becherini, Y
Tjus, JB
Berge, D
Bernhard, S
Bernloehr, K
Blackwell, R
Bottcher, M
Boisson, C
Bolmont, J
Bonnefoy, S
Bordas, P
Bregeon, J
Brun, F
Brun, P
Bryan, M
Buechele, M
Bulik, T
Bylund, T
Capasso, M
Caroff, S
Carosi, A
Casanova, S
Cerruti, M
Chakraborty, N
Chandra, S
Chaves, RCG
Chen, A
Colafrancesco, S
Condon, B
Davids, ID
Deil, C
Devin, J
deWilt, P
Dirson, L
Djannati-Atai, A
Dmytriiev, A
Donath, A
Doroshenko, V
Drury, LO
Dyks, J
Egberts, K
Emery, G
Ernenwein, J-P
Eschbach, S
Fegan, S
Fiasson, A
Fontaine, G
Funk, S
Fuessling, M
Gabici, S
Gallant, YA
Gate, F
Giavitto, G
Glawion, D
Glicenstein, JF
Gottschall, D
Grondin, M-H
Hahn, J
Haupt, M
Heinzelmann, G
Henri, G
Hermann, G
Hinton, JA
Hofmann, W
Hoischen, C
Holch, TL
Holler, M
Horns, D
Huber, D
Iwasaki, H
Jacholkowska, A
Jamrozy, M
Jankowsky, D
Jankowsky, F
Jouvin, L
Jung-Richardt, I
Kastendieck, MA
Katarzynski, K
Katsuragawa, M
Katz, U
Kerszberg, D
Khangulyan, D
Khelifi, B
King, J
Klepser, S
Kluzniak, W
Komin, N
Kosack, K
Krakau, S
Kraus, M
Kruger, PP
Lamanna, G
Lau, J
Lefaucheur, J
Lemiere, A
Lemoine-Goumard, M
Lenain, J-P
Leser, E
Lohse, T
Lorentz, M
Lopez-Coto, R
Lypova, I
Malyshev, D
Marandon, V
Marcowith, A
Mariaud, C
Marti-Devesa, G
Marx, R
Maurin, G
Meintjes, PJ
Mitchell, AMW
Moderski, R
Mohamed, M
Mohrmann, L
Moulin, E
Murach, T
Nakashima, S
de Naurois, M
Ndiyavala, H
Niederwanger, F
Niemiec, J
Oakes, L
O'Brien, P
Odaka, H
Ohm, S
Ostrowski, M
Oya, I
Padovani, M
Panter, M
Parsons, RD
Perennes, C
Petrucci, P-O
Peyaud, B
Piel, Q
Pita, S
Poireau, V
Noel, AP
Prokhorov, DA
Prokoph, H
Puehlhofer, G
Punch, M
Quirrenbach, A
Raab, S
Rauth, R
Reimer, A
Reimer, O
Renaud, M
Rieger, F
Rinchiuso, L
Romoli, C
Rowell, G
Rudak, B
Ruiz-Velasco, E
Sahakian, V
Saito, S
Sanchez, DA
Santangelo, A
Sasaki, M
Schlickeiser, R
Schussler, F
Schulz, A
Schwanke, U
Schwemmer, S
Seglar-Arroyo, M
Senniappan, M
Seyffert, AS
Shafi, N
Shilon, I
Shiningayamwe, K
Simoni, R
Sinha, A
Sol, H
Spanier, F
Specovius, A
Spir-Jacob, M
Stawarz, L
Steenkamp, R
Stegmann, C
Steppa, C
Takahashi, T
Tavernet, J-P
Tavernier, T
Taylor, AM
Terrier, R
Tibaldo, L
Tiziani, D
Tluczykont, M
Trichard, C
Tsirou, M
Tsuji, N
Tuffs, R
Uchiyama, Y
van der Walt, DJ
van Eldik, C
van Rensburg, C
van Soelen, B
Vasileiadis, G
Veh, J
Venter, C
Viana, A
Vincent, P
Vink, J
Voisin, F
Voelk, HJ
Vuillaume, T
Wadiasingh, Z
Wagner, SJ
Wagner, RM
White, R
Wierzcholska, A
Yang, R
Zaborov, D
Zacharias, M
Zanin, R
Zdziarski, A
Zech, A
Zefi, F
Ziegler, A
Zorn, J
Zywucka, N
Cirelli, M
Panci, P
Sala, F
Silk, J
Taoso, M
First Published: 23-Nov-2018
Publisher: IOP Publishing
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.
DOI Link: 10.1088/1475-7516/2018/11/037
ISSN: 1475-7516
Embargo on file until: 23-Nov-2019
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2018, IOP Publishing Ltd and Sissa Medialab . Deposited with reference to the publisher’s open access archiving policy. (
Description: The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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