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Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S

A. Abramowski Fabio Acero 1 F. Aharonian A. G. Akhperjanian G. Anton S. Balenderan Agnès Balzer A. Barnacka Y. Becherini 2, 3 J. Becker Tjus K. Bernlöhr E. Birsin J. Biteau 2 A. Bochow C. Boisson 4 J. Bolmont 5 P. Bordas J. Brucker F. Brun 2 P. Brun T. Bulik S. Carrigan S. Casanova M. Cerruti 4 P. M. Chadwick R. C. G. Chaves A. Cheesebrough S. Colafrancesco G. Cologna J. Conrad C. Couturier M. Dalton M. K. Daniel I. D. Davids B. Degrange 2 C. Deil P. Dewilt H. J. Dickinson A. Djannati-Ataï 6 W. Domainko L. O'C. Drury G. Dubus K. Dutson J. Dyks M. Dyrda K. Egberts P. Eger P. Espigat 3 L. Fallon C. Farnier S. Fegan F. Feinstein 1 M. V. Fernandes D. Fernandez A. Fiasson 7 G. Fontaine 2 A. Förster M. Füßling M. Gajdus Y. A. Gallant 1 T. Garrigoux H. Gast B. Giebels 2 J. F. Glicenstein B. Glück D. Göring M. -H. Grondin S. Häffner J. D. Hague J. Hahn D. Hampf J. Harris S. Heinz G. Heinzelmann G. Henri G. Hermann A. Hillert J. A. Hinton W. Hofmann P. Hofverberg M. Holler D. Horns A. Jacholkowska 5 C. Jahn M. Jamrozy I. Jung M. A. Kastendieck K. Katarzyński U. Katz S. Kaufmann B. Khélifi 2 S. Klepser D. Klochkov W. Kluźniak T. Kneiske Nu. Komin 7 K. Kosack R. Kossakowski 7 F. Krayzel 7 P. P. Krüger H. Laffon 2 G. Lamanna J. Lefaucheur 3 M. Lemoine-Goumard 8 J. -P. Lenain 9, 3 D. Lennarz T. Lohse A. Lopatin C. -C. Lu V. Marandon A. Marcowith 1 J. Masbou 7 G. Maurin 7 N. Maxted M. Mayer T. J. L. Mccomb M. C. Medina J. Méhault 1 U. Menzler R. Moderski M. Mohamed Emmanuel Moulin C. L. Naumann 5 M. Naumann-Godo M. de Naurois 2 D. Nedbal D. Nekrassov N. Nguyen J. Niemiec S. J. Nolan S. Ohm E. de Oña Wilhelmi B. Opitz M. Ostrowski I. Oya M. Panter R. D. Parsons M. Paz Arribas N. W. Pekeur G. Pelletier J. Perez P. -O. Petrucci B. Peyaud S. Pita 3 G. Pühlhofer M. Punch 3 A. Quirrenbach M. Raue A. Reimer O. Reimer M. Renaud 1 R. de Los Reyes F. Rieger J. Ripken L. Rob S. Rosier-Lees 7 G. Rowell B. Rudak C. B. Rulten V. Sahakian D. A. Sanchez A. Santangelo R. Schlickeiser A. Schulz U. Schwanke S. Schwarzburg S. Schwemmer F. Sheidaei 3 J. L. Skilton H. Sol 4 G. Spengler Ł. Stawarz R. Steenkamp C. Stegmann F. Stinzing K. Stycz I. Sushch A. Szostek J. -P. Tavernet 5 R. Terrier 3 M. Tluczykont C. Trichard 7 K. Valerius C. van Eldik G. Vasileiadis 1 C. Venter A. Viana P. Vincent 5 H. J. Völk F. Volpe S. Vorobiov M. Vorster S. J. Wagner M. Ward R. White A. Wierzcholska D. Wouters M. Zacharias A. Zajczyk A. A. Zdziarski A. Zech 4 H. -S. Zechlin
1 LUPM - Laboratoire Univers et Particules de Montpellier
2 LLR - Laboratoire Leprince-Ringuet
3 APC (UMR_7164) - AstroParticule et Cosmologie
4 LUTH (UMR_8102) - Laboratoire Univers et Théories
5 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
6 APC - AHE - APC - Astrophysique des Hautes Energies
APC (UMR_7164) - AstroParticule et Cosmologie, Dipartimento di Astronomia, Universita degli Studi di Bologna
7 LAPP - Laboratoire d'Annecy de Physique des Particules
8 GLAST
CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
9 LPNHE (UMR_7585) - Laboratoire de Physique Nucléaire et de Hautes Énergies
Abstract : Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_\gamma > 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 \gamma-ray sources that in most cases produce continuous spectra which span over several orders of magnitude in energy. Using data collected with the H.E.S.S. \gamma-ray instrument, upper limits on line-like 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 \gamma-ray line emission, flux limits of (2x10^-7 - 2x10^-5) m^-2 s^-1 sr^-1 and (1x10^-8 - 2x10^-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 < \sigma v >(\chi\chi -> \gamma\gamma) reach ~10^-27 cm^3 s^-1, based on the Einasto parametrization of the Galactic DM halo density profile.
Keywords : Gamma-ray Dark matter 95.85.Pw 95.35.+d
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Journal articles
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http://hal.in2p3.fr/in2p3-00780746
Contributor : Claudine Bombar <>
Submitted on : Thursday, January 24, 2013 - 5:10:13 PM
Last modification on : Thursday, January 7, 2021 - 5:56:02 PM

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IN2P3 | CEA | OBSPM | UPMC | UNIV-SAVOIE | CENBG | LAPP | LLR | LPNHE | APC | CNRS | X-LLR | X | LUPM | MIPS | IRFU-APC | DSM-IRFU | UNIV-MONTPELLIER | CEA-DRF | X-DEP-PHYS | SORBONNE-UNIVERSITE | UNIV-PARIS7 | USPC | LUPM_EMA | SU-SCIENCES | UNIV-PARIS | LUTH | ENS-PARIS | INSU | UP-SCIENCES | PSL | UGA | SU-TI

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A. Abramowski, Fabio Acero, F. Aharonian, A. G. Akhperjanian, G. Anton, et al.. Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S. Physical Review Letters, American Physical Society, 2013, 110, pp.041301. ⟨10.1103/PhysRevLett.110.041301⟩. ⟨in2p3-00780746⟩

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