Search for Photon-Linelike Signatures from Dark Matter Annihilations with H.E.S.S.

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ID: 270567
2013
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Abstract
Gamma-ray line signatures can be expected in the very-high-energy (Eγ>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 cm3 s−1, based on the Einasto parametrization of the Galactic DM halo density profile.
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Authors A. Abramowski,F. Acero,F. Aharonian,A. G. Akhperjanian,Gisela Anton,S. Balenderan,A. Balzer,A. Barnacka,Y. Becherini,Julia Tjus,K. Bernlöhr,E. Birsin,J. Biteau,A. Bochow,C. Boisson,Julien Bolmont,Pol Bordas,J. Brucker,F. Brun,P. Brun,T. Bulik,S. Carrigan,S. Casanova,Matteo Cerruti,Paula Chadwick,R. C. G. Chaves,A. Cheesebrough,S. Colafrancesco,G. Cologna,J. Conrad,C. Couturier,M. Dalton,Michael Daniel,I. D. Davids,B. Degrange,C. Deil,P. Dewilt,H. J. Dickinson,A. Djannati-Ataï,W. Domainko,Luke Drury,Guillaume Dubus,K. Dutson,J. Dyks,M. Dyrda,K. Egberts,P. Eger,P. Espigat,L. Fallon,C. Farnier,S J Fegan,F. Feinstein,M. V. Fernandes,Daniel Mendez Fernandez,A. Fiasson,G. Fontaine,A. Förster,M. Füßling,M. Gajdus,Y. A. Gallant,T. Garrigoux,H. Gast,B. Giebels,J. F. Glicenstein,B. Glück,Derek G Goring,M.-H. Grondin,Steven M Haffner,J. D. Hague,J. Hahn,D. Hampf,J. Harris,S. Heinz,G. Heinzelmann,G. Henri,G. Hermann,A. Hillert,James Hinton,W. Hofmann,P. Hofverberg,M. Holler,Dieter Horns,A. Jacholkowska,C. Jahn,Marek Jamrozy,I. Jung,M. A. Kastendieck,Krzysztof Katarzynski,Uli Katz,S. Kaufmann,B. Khélifi,S. Klepser,D. Klochkov,W. Kluźniak,Tanja M. Kneiske,Nukri Komin,K. Kosack,R. Kossakowski,F. Krayzel,Paulus Kruger,H. Laffon,G. Lamanna,J. Lefaucheur,M. Lemoine-Goumard,Jean-Philippe Lenain,Dirk Lennarz,T. Lohse,A. Lopatin,C.-C. Lu,Vincent Marandon,A. Marcowith,J. Masbou,G. Maurin,Nigel Maxted,M. Mayer,T. J. L. McComb,M. C. Medina,J. Méhault,U. Menzler,Rafal Moderski,Mahmoud Mohamed,Emmanuel Moulin,C. L. Naumann,M. Naumann-Godo,M. De Naurois,D. Nedbal,D. Nekrassov,N. Nguyen,Jacek Niemiec,S. J. Nolan,S. Ohm,Emma De Ona Wilhelmi,B. Opitz,M. Ostrowski,Igor Oya,M. Panter,R. D. Parsons,M. Paz Arribas,N. W. Pekeur,G. Pelletier,J. Perez,P.-O. Petrucci,B. Peyaud,S. Pita,G. Pühlhofer,Michael Punch,A. Quirrenbach,M. Raue,Anita Reimer,Olaf Reimer,M. Renaud,R. De Los Reyes,Frank Rieger,J. Ripken,L. Rob,S. Rosier-Lees,Gavin Rowell,B. Rudak,Cameron Rulten,V. Sahakian,D. A. Sanchez,A. Santangelo,R. Schlickeiser,A. Schulz,U. Schwanke,S. Schwarzburg,S. Schwemmer,F. Sheidaei,J. L. Skilton,H. Sol,G. Spengler,Ł. Stawarz,R. Steenkamp,C. Stegmann,F. Stinzing,K. Stycz,Iurii Sushch,A. Szostek,J.-P. Tavernet,R. Terrier,M. Tluczykont,C. Trichard,K. Valerius,Christopher van Eldik,G. Vasileiadis,Christo Venter,Aion Viana,P. Vincent,H. J. Völk,F. Volpe,Serguei Vorobiov,M. Vorster,S. J. Wagner,M. Ward,Richard White,Alicja Wierzcholska,D. Wouters,Michael Zacharias,A. Zajczyk,A. A. Zdziarski,A. Zech,Hannes Zechlin;A. Abramowski;F. Acero;F. Aharonian;A. G. Akhperjanian;Gisela Anton;S. Balenderan;A. Balzer;A. Barnacka;Y. Becherini;Julia Tjus;K. Bernlöhr;E. Birsin;J. Biteau;A. Bochow;C. Boisson;Julien Bolmont;Pol Bordas;J. Brucker;F. Brun;P. Brun;T. Bulik;S. Carrigan;S. Casanova;Matteo Cerruti;Paula Chadwick;R. C. G. Chaves;A. Cheesebrough;S. Colafrancesco;G. Cologna;J. Conrad;C. Couturier;M. Dalton;Michael Daniel;I. D. Davids;B. Degrange;C. Deil;P. Dewilt;H. J. Dickinson;A. Djannati-Ataï;W. Domainko;Luke Drury;Guillaume Dubus;K. Dutson;J. Dyks;M. Dyrda;K. Egberts;P. Eger;P. Espigat;L. Fallon;C. Farnier;S J Fegan;F. Feinstein;M. V. Fernandes;Daniel Mendez Fernandez;A. Fiasson;G. Fontaine;A. Förster;M. Füßling;M. Gajdus;Y. A. Gallant;T. Garrigoux;H. Gast;B. Giebels;J. F. Glicenstein;B. Glück;Derek G Goring;M.-H. Grondin;Steven M Haffner;J. D. Hague;J. Hahn;D. Hampf;J. Harris;S. Heinz;G. Heinzelmann;G. Henri;G. Hermann;A. Hillert;James Hinton;W. Hofmann;P. Hofverberg;M. Holler;Dieter Horns;A. Jacholkowska;C. Jahn;Marek Jamrozy;I. Jung;M. A. Kastendieck;Krzysztof Katarzynski;Uli Katz;S. Kaufmann;B. Khélifi;S. Klepser;D. Klochkov;W. Kluźniak;Tanja M. Kneiske;Nukri Komin;K. Kosack;R. Kossakowski;F. Krayzel;Paulus Kruger;H. Laffon;G. Lamanna;J. Lefaucheur;M. Lemoine-Goumard;Jean-Philippe Lenain;Dirk Lennarz;T. Lohse;A. Lopatin;C.-C. Lu;Vincent Marandon;A. Marcowith;J. Masbou;G. Maurin;Nigel Maxted;M. Mayer;T. J. L. McComb;M. C. Medina;J. Méhault;U. Menzler;Rafal Moderski;Mahmoud Mohamed;Emmanuel Moulin;C. L. Naumann;M. Naumann-Godo;M. De Naurois;D. Nedbal;D. Nekrassov;N. Nguyen;Jacek Niemiec;S. J. Nolan;S. Ohm;Emma De Ona Wilhelmi;B. Opitz;M. Ostrowski;Igor Oya;M. Panter;R. D. Parsons;M. Paz Arribas;N. W. Pekeur;G. Pelletier;J. Perez;P.-O. Petrucci;B. Peyaud;S. Pita;G. Pühlhofer;Michael Punch;A. Quirrenbach;M. Raue;Anita Reimer;Olaf Reimer;M. Renaud;R. De Los Reyes;Frank Rieger;J. Ripken;L. Rob;S. Rosier-Lees;Gavin Rowell;B. Rudak;Cameron Rulten;V. Sahakian;D. A. Sanchez;A. Santangelo;R. Schlickeiser;A. Schulz;U. Schwanke;S. Schwarzburg;S. Schwemmer;F. Sheidaei;J. L. Skilton;H. Sol;G. Spengler;Ł. Stawarz;R. Steenkamp;C. Stegmann;F. Stinzing;K. Stycz;Iurii Sushch;A. Szostek;J.-P. Tavernet;R. Terrier;M. Tluczykont;C. Trichard;K. Valerius;Christopher van Eldik;G. Vasileiadis;Christo Venter;Aion Viana;P. Vincent;H. J. Völk;F. Volpe;Serguei Vorobiov;M. Vorster;S. J. Wagner;M. Ward;Richard White;Alicja Wierzcholska;D. Wouters;Michael Zacharias;A. Zajczyk;A. A. Zdziarski;A. Zech;Hannes Zechlin;
Journal physical review letters
Year 2013
DOI
10.1103/physrevlett.110.041301
URL
https://sciprofiles.com/publication/view/8decf0d37dab0bd10cc2c84e590bb8e8
Keywords
particle matter annihilation dark instrument milky extragalactic h.e.s.s

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