Skip to Main content Skip to Navigation
Journal articles

A search for a dark matter annihilation signal towards the Canis Major overdensity with H.E.S.S

F. Aharonian A.G. Akhperjanian U. Barres de Almeida A.R. Bazer-Bachi 1 B. Behera M. Beilicke W. Benbow K. Bernlöhr C. Boisson 2 V. Borrel 1 I. Braun E. Brion 3 J. Brucker R. Bühler T. Bulik I. Büsching T. Boutelier 4 S. Carrigan P.M. Chadwick R. Chaves L.-M. Chounet 5 G. Coignet 6 R. Cornils L. Costamante M. Dalton B. Degrange 5 H.J. Dickinson A. Djannati-Ataï 7 W. Domainko L.O'C. Drury F. Dubois 6 G. Dubus 4 J. Dyks K. Egberts D. Emmanoulopoulos P. Espigat 8 C. Farnier 9 F. Feinstein 9 A. Fiasson 3, 9 A. Förster G. Fontaine 5 M. Füßling S. Gabici Y.A. Gallant 9 L. Gérard 8 B. Giebels 5 J.F. Glicenstein 3 B. Glück P. Goret 3 C. Hadjichristidis D. Hauser M. Hauser G. Heinzelmann G. Henri 4 G. Hermann J.A. Hinton A. Hoffmann W. Hofmann M. Holleran S. Hoppe D. Horns A. Jacholkowska 9 O.C. de Jager I. Jung K. Katarzy'Nski E. Kendziorra M. Kerschhaggl D. Khangulyan B. Khélifi 5 D. Keogh Nu. Komin 9 K. Kosack G. Lamanna 6 I.J. Latham J.-P. Lenain 2 T. Lohse J.M. Martin 2 O. Martineau-Huynh 10 A. Marcowith 9 C. Masterson D. Maurin 10 T.J.L. Mccomb R. Moderski Emmanuel Moulin 3 M. Naumann-Godo 5 M. de Naurois 10 D. Nedbal D. Nekrassov S.J. Nolan S. Ohm J.-P. Olive 1 E. de Oña Wilhelmi 8 K.J. Orford J.L. Osborne M. Ostrowski M. Panter G. Pedaletti G. Pelletier 4 P.-O. Petrucci 4 S. Pita 8 G. Pühlhofer M. Punch 8 A. Quirrenbach B.C. Raubenheimer M. Raue S.M. Rayner M. Renaud F. Rieger J. Ripken L. Rob S. Rosier-Lees 6 G. Rowell B. Rudak J. Ruppel V. Sahakian A. Santangelo R. Schlickeiser F.M. Scöck R. Schröder U. Schwanke S. Schwarzburg S. Schwemmer A. Shalchi H. Sol 2 D. Spangler L. Stawarz R. Steenkamp C. Stegmann G. Superina 5 P.H. Tam J.-P. Tavernet 10 R. Terrier 8 V. Marandon 8 C. van Eldik G. Vasileiadis 9 C. Venter J.P. Vialle 6 P. Vincent 10 M. Vivier 3 H.J. Völk F. Volpe 5 S.J. Wagner M. Ward A.A. Zdziarski A. Zech 2
Abstract : A search for a dark matter (DM) annihilation signal into $\gamma$-rays toward the direction of the Canis Major (CMa) overdensity is presented. The nature of CMa is still controversial and one scenario represents it as a dwarf galaxy, making it an interesting candidate for DM annihilation searches. A total of 9.6 hours of high quality data were collected with the H.E.S.S. array of Imaging Atmospheric Cherenkov Telescopes (IACTs) and no evidence for a very high energy $\gamma$-ray signal is found. Upper limits on the CMa dwarf galaxy mass of the order of 10$^{9}$ M$_{\odot}$ are derived at the 95% C.L. assuming neutralino masses in the range 500 GeV - 10 TeV and relatively large annihilation cross-sections. Constraints on the velocity-weighted annihilation cross section $<\sigma v>$, are calculated for specific WIMP scenarios, using a NFW model for the DM halo profile and taking advantage of numerical simulations of hierarchical structure formation. 95% C.L. exclusion limits of the order of 5 $\times$ 10$^{-24}$ cm$^{3}$ s$^{-1}$ are reached in the 500 GeV - 10 TeV DM particle mass interval, assuming a total halo mass of 3 $\times$ 10$^{8}$ M$_{\odot}$.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00324687
Contributor : Simone Lantz <>
Submitted on : Thursday, September 25, 2008 - 4:32:01 PM
Last modification on : Tuesday, November 17, 2020 - 2:36:03 PM

Links full text

Identifiers

Citation

F. Aharonian, A.G. Akhperjanian, U. Barres de Almeida, A.R. Bazer-Bachi, B. Behera, et al.. A search for a dark matter annihilation signal towards the Canis Major overdensity with H.E.S.S. The Astrophysical Journal, American Astronomical Society, 2009, 691, pp.175-181. ⟨10.1088/0004-637X/691/1/175⟩. ⟨in2p3-00324687⟩

Share

Metrics

Record views

818