Search for dark matter annihilation signals from unidentified Fermi-LAT objects with H.E.S.S.

Cosmological N-body simulations show that Milky Way-sized galaxies harbor a population of unmerged dark matter (DM) subhalos. These subhalos could shine in gamma-rays and eventually be detected in gamma-ray surveys as unidentified sources. We performed a thorough selection among unidentified Fermi-L...

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Hauptverfasser: Abdalla, Hassan (VerfasserIn) , Aharonian, F. (VerfasserIn) , Ait Benkhali, F. (VerfasserIn) , Anguner, E. O. (VerfasserIn) , Arcaro, C. (VerfasserIn) , Armand, C. (VerfasserIn) , Armstrong, T. (VerfasserIn) , Ashkar, H. (VerfasserIn) , Backes, M. (VerfasserIn) , Baghmanyan, V. (VerfasserIn) , Barbosa-Martins, V. (VerfasserIn) , Barnacka, A. (VerfasserIn) , Barnard, M. (VerfasserIn) , Becherini, Y. (VerfasserIn) , Berge, D. (VerfasserIn) , Bernlöhr, Konrad (VerfasserIn) , Donath, Axel (VerfasserIn) , Hinton, James Anthony (VerfasserIn) , Hofmann, Wilfried (VerfasserIn) , Jankowsky, Felix (VerfasserIn) , Marx, Ramin (VerfasserIn) , Puhlhoefer, G. (VerfasserIn) , Quirrenbach, Andreas (VerfasserIn) , Rieger, Frank M. (VerfasserIn) , Völk, Heinrich J. (VerfasserIn) , Wagner, Stefan (VerfasserIn) , Wierzcholska, Alicja (VerfasserIn)
Körperschaft: H.E.S.S. Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2021 August 30
In: The astrophysical journal
Year: 2021, Jahrgang: 918, Heft: 1, Pages: 1-14
ISSN:1538-4357
DOI:10.3847/1538-4357/abff59
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-4357/abff59
Verlag, lizenzpflichtig, Volltext: https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=DynamicDOIArticle&SrcApp=WOS&KeyAID=10.3847%2F1538-4357%2Fabff59&DestApp=DOI&SrcAppSID=F5XLi9Bxi6yzg6FJWGI&SrcJTitle=ASTROPHYSICAL+JOURNAL&DestDOIRegistrantName=American+Astronomical+Society
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Verfasserangaben:H. Abdalla, F. Aharonian, F. Ait Benkhali, E.O. Anguner, C. Arcaro, C. Armand, T. Armstrong, H. Ashkar, M. Backes, V. Baghmanyan, V. Barbosa-Martins, A. Barnacka, M. Barnard, Y. Becherini, D. Berge, K. Bernloehr, B. Bi, M. Bottcher, C. Boisson, J. Bolmont, M. de Bony de Lavergne, M. Breuhaus, R. Brose, F. Brun, T. Bulik, T. Bylund, F. Cangemi, S. Caroff, S. Casanova, P. Chambery, J. Catalano, T. Chand, A. Chen, G. Cotter, M. Curylo, H. Dalgleish, J. Damascene Mbarubucyeye, I. D. Davids, J. Davies, J. Devin, A. Djannati-Atai, A. Dmytriiev, A. Donath, V. Doroshenko, L. Dreyer, L. du Plessis, C. Duffy, K. Egberts, S. Einecke, G. Emery, J.-P. Ernenwein, K. Feijen, S. Fegan, A. Fiasson, G. Fichet de Clairfontaine, G. Fontaine, S. Funk, M. Fuessling, S. Gabici, Y. A. Gallant, S. Ghafourizade, G. Giavitto, L. Giunti, D. Glawion, J. F. Glicenstein, M.-H. Grondin, S. Hattingh, M. Haupt, G. Hermann, J. A. Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, M. Horbe, D. Horns, Z. Huang, D. Huber, M. Jamrozy, D. Jankowsky, F. Jankowsky, V. Joshi, I. Jung-Richardt, E. Kasai, K. Katarzynski, U. Katz, D. Khangulyan, B. Khelifi, S. Klepser, W. Kluzniak, Nu Komin, R. Konno, K. Kosack, D. Kostunin, M. Kreter, G. Kukec Mezek, A. Kundu, G. Lamanna, S. Le Stum, A. Lemiere, M. Lemoine-Goumard, J.-P. Lenain, F. Leuschner, C. Levy, A. Luashvili, T. Lohse, I. Lypova, J. Mackey, J. Majumdar, D. Malyshev, D. Malyshev, V. Marandon, P. Marchegiani, A. Marcowith, A. Mares, G. Marti-Devesa, R. Marx, G. Maurin, P.J. Meintjes, M. Meyer, A. Mitchell, R. Moderski, L. Mohrmann, A. Montanari, C. Moore, P. Morris, E. Moulin, J. Muller, T. Murach, K. Nakashima, A. Nayerhoda, M. de Naurois, H. Ndiyavala, J. Niemiec, A. Noel, L. Oberholzer, P. O'Brien, S. Ohm, L. Olivera-Nieto, E. de Ona Wilhelmi, M. Ostrowski, M. Panter, S. Panny, R.D. Parsons, G. Peron, S. Pita, V. Poireau, D.A. Prokhorov, H. Prokoph, G. Puhlhoefer, M. Punch, A. Quirrenbach, P. Reichherzer, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, C. Romoli, G. Rowell, B. Rudak, H. Rueda Ricarte, E. Ruiz-Velasco, V. Sahakian, S. Sailer, H. Salzmann, D. A. Sanchez, A. Santangelo, M. Sasaki, J. Schaefer, F. Schussler, H. M. Schutte, U. Schwanke, M. Senniappan, A. S. Seyffert, J.N.S. Shapopi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Spackman, H. Sol, A. Specovius, S. Spencer, M. Spir-Jacob, L. Stawarz, L. Sun, R. Steenkamp, C. Stegmann, S. Steinmassl, C. Steppa, T. Takahashi, T. Tanaka, T. Tavernier, A.M. Taylor, R. Terrier, C. Thorpe-Morgan, J.H.E. Thiersen, M. Tluczykont, L. Tomankova, M. Tsirou, M. Tsuji, R. Tuffs, Y. Uchiyama, D. J. van der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, A. Viana, J. Vink, H.J. Voelk, S.J. Wagner, F. Werner, R. White, A. Wierzcholska, Yu Wun Wong, H. Yassin, A. Yusafzai, M. Zacharias, R. Zanin, D. Zargaryan, A.A. Zdziarski, A. Zech, S.J. Zhu, A. Zmija, J. Zorn, S. Zouari, and N. Zywucka (H.E.S.S. Collaboration)

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264 1 |c 2021 August 30 
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500 |a Gesehen am 26.01.2022 
520 |a Cosmological N-body simulations show that Milky Way-sized galaxies harbor a population of unmerged dark matter (DM) subhalos. These subhalos could shine in gamma-rays and eventually be detected in gamma-ray surveys as unidentified sources. We performed a thorough selection among unidentified Fermi-Large Area Telescope Objects (UFOs) to identify them as possible tera-electron-volt-scale DM subhalo candidates. We search for very-high-energy (E greater than or similar to 100 GeV) gamma-ray emissions using H.E.S.S. observations toward four selected UFOs. Since no significant very-high-energy gamma-ray emission is detected in any data set of the four observed UFOs or in the combined UFO data set, strong constraints are derived on the product of the velocity-weighted annihilation cross section sigma v by the J factor for the DM models. The 95% confidence level observed upper limits derived from combined H.E.S.S. observations reach sigma vJ values of 3.7 x 10(-5) and 8.1 x 10(-6) GeV(2 )cm(-2 )s(-1) in the W (+) W (-) and tau (+) tau (-) channels, respectively, for a 1 TeV DM mass. Focusing on thermal weakly interacting massive particles, the H.E.S.S. constraints restrict the J factors to lie in the range 6.1 x 10(19)-2.0 x 10(21) GeV(2 )cm(-5) and the masses to lie between 0.2 and 6 TeV in the W (+) W (-) channel. For the tau (+) tau (-) channel, the J factors lie in the range 7.0 x 10(19)-7.1 x 10(20) GeV(2 )cm(-5) and the masses lie between 0.2 and 0.5 TeV. Assuming model-dependent predictions from cosmological N-body simulations on the J-factor distribution for Milky Way-sized galaxies, the DM models with masses >0.3 TeV for the UFO emissions can be ruled out at high confidence level. 
650 4 |a baryonic physics 
650 4 |a clumpy 
650 4 |a galaxy 
650 4 |a gamma-ray 
650 4 |a impact 
650 4 |a mass function 
650 4 |a project 
650 4 |a subhaloes 
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SRT |a HESSCOLLABSEARCHFORD2021