| Literature DB >> 25166149 |
A Abramowski1, F Acero2, F Aharonian3, A G Akhperjanian4, G Anton5, S Balenderan6, A Balzer7, A Barnacka8, Y Becherini9, J Becker Tjus10, K Bernlöhr11, E Birsin12, J Biteau13, A Bochow14, C Boisson15, J Bolmont16, P Bordas17, J Brucker5, F Brun13, P Brun18, T Bulik19, S Carrigan14, S Casanova20, M Cerruti15, P M Chadwick6, R C G Chaves21, A Cheesebrough6, S Colafrancesco22, G Cologna23, J Conrad24, C Couturier16, M Dalton25, M K Daniel6, I D Davids26, B Degrange13, C Deil14, P deWilt27, H J Dickinson24, A Djannati-Ataï28, W Domainko14, L O'C Drury29, G Dubus30, K Dutson31, J Dyks32, M Dyrda33, K Egberts34, P Eger5, P Espigat28, L Fallon29, C Farnier24, S Fegan13, F Feinstein2, M V Fernandes1, D Fernandez2, A Fiasson35, G Fontaine13, A Förster14, M Füßling12, M Gajdus12, Y A Gallant2, T Garrigoux16, H Gast14, B Giebels13, J F Glicenstein18, B Glück5, D Göring5, M-H Grondin36, S Häffner5, J D Hague14, J Hahn14, D Hampf1, J Harris6, S Heinz5, G Heinzelmann1, G Henri30, G Hermann14, A Hillert14, J A Hinton31, W Hofmann14, P Hofverberg14, M Holler37, D Horns1, A Jacholkowska16, C Jahn5, M Jamrozy38, I Jung5, M A Kastendieck1, K Katarzyński39, U Katz5, S Kaufmann23, B Khélifi13, S Klepser40, D Klochkov17, W Kluźniak32, T Kneiske1, Nu Komin35, K Kosack18, R Kossakowski35, F Krayzel35, P P Krüger20, H Laffon13, G Lamanna35, J Lefaucheur28, M Lemoine-Goumard41, J-P Lenain28, D Lennarz14, T Lohse12, A Lopatin5, C-C Lu14, V Marandon14, A Marcowith2, J Masbou35, G Maurin35, N Maxted27, M Mayer37, T J L McComb6, M C Medina18, J Méhault42, U Menzler10, R Moderski32, M Mohamed23, E Moulin18, C L Naumann16, M Naumann-Godo18, M de Naurois13, D Nedbal43, D Nekrassov14, N Nguyen1, J Niemiec33, S J Nolan6, S Ohm44, E de Oña Wilhelmi14, B Opitz1, M Ostrowski38, I Oya12, M Panter14, R D Parsons14, M Paz Arribas12, N W Pekeur45, G Pelletier30, J Perez34, P-O Petrucci30, B Peyaud18, S Pita28, G Pühlhofer17, M Punch28, A Quirrenbach23, M Raue1, A Reimer34, O Reimer34, M Renaud2, R de Los Reyes14, F Rieger14, J Ripken24, L Rob43, S Rosier-Lees35, G Rowell27, B Rudak32, C B Rulten6, V Sahakian4, D A Sanchez14, A Santangelo17, R Schlickeiser10, A Schulz40, U Schwanke12, S Schwarzburg17, S Schwemmer23, F Sheidaei46, J L Skilton14, H Sol15, G Spengler12, L Stawarz38, R Steenkamp26, C Stegmann7, F Stinzing5, K Stycz40, I Sushch12, A Szostek38, J-P Tavernet16, R Terrier28, M Tluczykont1, C Trichard35, K Valerius5, C van Eldik47, G Vasileiadis2, C Venter45, A Viana18, P Vincent16, H J Völk14, F Volpe14, S Vorobiov2, M Vorster45, S J Wagner23, M Ward6, R White31, A Wierzcholska38, D Wouters18, M Zacharias10, A Zajczyk48, A A Zdziarski32, A Zech15, H-S Zechlin1.
Abstract
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.Entities:
Year: 2013 PMID： 25166149 DOI： 10.1103/PhysRevLett.110.041301
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161