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Very high energy ga...
Very high energy gamma-ray observations of the galaxy clusters Abell 496 and Abell 85 with HESS
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Aharonian, F. (author)
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Akhperjanian, A. G. (author)
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Anton, G. (author)
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show more...
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de Almeida, U. Barres (author)
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Bazer-Bachi, A. R. (author)
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Becherini, Yvonne (author)
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Behera, B. (author)
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Bernloehr, K. (author)
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Boisson, C. (author)
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Bochow, A. (author)
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Borrel, V. (author)
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Braun, I. (author)
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Brion, E. (author)
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Brucker, J. (author)
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Brun, P. (author)
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Buehler, R. (author)
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Bulik, T. (author)
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Buesching, I. (author)
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Boutelier, T. (author)
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Chadwick, P. M. (author)
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Charbonnier, A. (author)
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Chaves, R. C. G. (author)
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Cheesebrough, A. (author)
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Chounet, L. -M (author)
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Clapson, A. C. (author)
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Coignet, G. (author)
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Dalton, M. (author)
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Daniel, M. K. (author)
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Degrange, B. (author)
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Deil, C. (author)
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Dickinson, H. J. (author)
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Djannati-Atai, A. (author)
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Domainko, W. (author)
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Drury, L. O 'C. (author)
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Dubois, F. (author)
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Dubus, G. (author)
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Dyks, J. (author)
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Dyrda, M. (author)
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Egberts, K. (author)
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Emmanoulopoulos, D. (author)
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Espigat, P. (author)
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Farnier, C. (author)
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Feinstein, F. (author)
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Fiasson, A. (author)
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Foerster, A. (author)
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Fontaine, G. (author)
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Fuessling, M. (author)
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Gabici, S. (author)
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Gallant, Y. A. (author)
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Gerard, L. (author)
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Giebels, B. (author)
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Glicenstein, J. F. (author)
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Glueck, B. (author)
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Goret, P. (author)
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Hauser, D. (author)
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Hauser, M. (author)
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Heinz, S. (author)
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Heinzelmann, G. (author)
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Henri, G. (author)
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Hermann, G. (author)
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Hinton, J. A. (author)
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Hoffmann, A. (author)
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Hofmann, W. (author)
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Holleran, M. (author)
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Hoppe, S. (author)
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Horns, D. (author)
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Jacholkowska, A. (author)
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de Jager, O. C. (author)
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Jung, I. (author)
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Katarzynski, K. (author)
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Katz, U. (author)
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Kaufmann, S. (author)
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Kendziorra, E. (author)
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Kerschhaggl, M. (author)
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Khangulyan, D. (author)
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Khelifi, B. (author)
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Keogh, D. (author)
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Komin, Nu. (author)
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Kosack, K. (author)
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Lamanna, G. (author)
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Lenain, J. -P (author)
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Lohse, T. (author)
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Marandon, V. (author)
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Martin, J. M. (author)
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Martineau-Huynh, O. (author)
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Marcowith, A. (author)
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Maurin, D. (author)
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McComb, T. J. L. (author)
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Medina, M. C. (author)
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Moderski, R. (author)
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Moulin, E. (author)
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Naumann-Godo, M. (author)
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de Naurois, M. (author)
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Nedbal, D. (author)
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Nekrassov, D. (author)
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Niemiec, J. (author)
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Nolan, S. J. (author)
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Ohm, S. (author)
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Olive, J. -F (author)
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Wilhelmi, E. de Ona (author)
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Orford, K. J. (author)
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Ostrowski, M. (author)
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Panter, M. (author)
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Arribas, M. Paz (author)
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Pedaletti, G. (author)
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Pelletier, G. (author)
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Petrucci, P. -O (author)
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Pita, S. (author)
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Puehlhofer, G. (author)
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- Punch, M. (author)
- Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France
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Quirrenbach, A. (author)
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Raubenheimer, B. C. (author)
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Raue, M. (author)
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Rayner, S. M. (author)
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Renaud, M. (author)
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Rieger, F. (author)
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Ripken, J. (author)
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Rob, L. (author)
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Rosier-Lees, S. (author)
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Rowell, G. (author)
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Rudak, B. (author)
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Rulten, C. B. (author)
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Ruppel, J. (author)
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Sahakian, V. (author)
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Santangelo, A. (author)
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Schlickeiser, R. (author)
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Schoeck, F. M. (author)
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Schroeder, R. (author)
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Schwanke, U. (author)
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Schwarzburg, S. (author)
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Schwemmer, S. (author)
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Shalchi, A. (author)
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Skilton, J. L. (author)
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Sol, H. (author)
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Spangler, D. (author)
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Stawarz, L. (author)
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Steenkamp, R. (author)
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Stegmann, C. (author)
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Superina, G. (author)
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Szostek, A. (author)
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Tam, P. H. (author)
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Tavernet, J. -P (author)
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Terrier, R. (author)
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Tibolla, O. (author)
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van Eldik, C. (author)
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Vasileiadis, G. (author)
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Venter, C. (author)
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Venter, L. (author)
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Vialle, J. P. (author)
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Vincent, P. (author)
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Vivier, M. (author)
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Voelk, H. J. (author)
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Volpe, F. (author)
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Wagner, S. J. (author)
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Ward, M. (author)
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Zdziarski, A. A. (author)
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Zech, A. (author)
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(creator_code:org_t)
- 2008-12-22
- 2009
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 495:1, s. 27-35
- Related links:
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https://www.aanda.or...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- Aims. The nearby galaxy clusters Abell 496 and Abell 85 are studied in the very high-energy (VHE, E > 100 GeV) band to investigate VHE cosmic rays (CRs) in this class of objects which are the largest gravitationally bound systems in the Universe. Methods. HESS, an array of four imaging atmospheric cherenkov telescopes (IACT), was used to observe the targets in the range of VHE gamma rays. Results. No significant gamma-ray signal is found at the respective position of the two clusters with several different source size assumptions for each target. In particular, emission regions corresponding to the high-density core, to the extension of the entire X-ray emission in these clusters, and to the very extended region where the accretion shock is expected are investigated. Upper limits are derived for the gamma-ray flux at energies E > 570 GeV for Abell 496 and E > 460 GeV for Abell 85. Conclusions. From the non-detection in VHE gamma rays, upper limits on the total energy of hadronic CRs in the clusters are calculated. If the cosmic-ray energy density follows the large-scale gas density profile, the limit on the fraction of energy in these non-thermal particles with respect to the total thermal energy of the intra-cluster medium (ICM) is 51% for Abell 496 and only 8% for Abell 85 due to its higher mass and higher gas density. These upper limits are compared with theoretical estimates. They predict about similar to 10% of the thermal energy of the ICM in non-thermal particles. The observations presented here can constrain these predictions especially for the case of the Abell 85 cluster.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: clusters: individual: Abell 496
- galaxies: clusters: individual: Abell 85
- gamma rays: observations
- Astropartikelfysik
- Astroparticle Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Aharonian, F.
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Akhperjanian, A. ...
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Anton, G.
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de Almeida, U. B ...
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Bazer-Bachi, A. ...
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Becherini, Yvonn ...
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show more...
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Behera, B.
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Bernloehr, K.
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Boisson, C.
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Bochow, A.
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Borrel, V.
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Braun, I.
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Brion, E.
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Brucker, J.
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Brun, P.
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Buehler, R.
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Bulik, T.
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Buesching, I.
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Boutelier, T.
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Chadwick, P. M.
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Charbonnier, A.
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Chaves, R. C. G.
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Cheesebrough, A.
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Chounet, L. -M
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Clapson, A. C.
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Coignet, G.
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Dalton, M.
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Daniel, M. K.
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Degrange, B.
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Deil, C.
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Dickinson, H. J.
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Djannati-Atai, A ...
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Domainko, W.
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Drury, L. O 'C.
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Dubois, F.
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Dubus, G.
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Dyks, J.
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Dyrda, M.
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Egberts, K.
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Emmanoulopoulos, ...
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Espigat, P.
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Farnier, C.
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Feinstein, F.
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Fiasson, A.
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Foerster, A.
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Fontaine, G.
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Fuessling, M.
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Gabici, S.
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Gallant, Y. A.
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Gerard, L.
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Giebels, B.
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Glicenstein, J. ...
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Glueck, B.
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Goret, P.
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Hauser, D.
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Hauser, M.
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Heinz, S.
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Heinzelmann, G.
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Henri, G.
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Hermann, G.
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Hinton, J. A.
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Hoffmann, A.
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Hofmann, W.
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Holleran, M.
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Hoppe, S.
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Horns, D.
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Jacholkowska, A.
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de Jager, O. C.
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Jung, I.
-
Katarzynski, K.
-
Katz, U.
-
Kaufmann, S.
-
Kendziorra, E.
-
Kerschhaggl, M.
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Khangulyan, D.
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Khelifi, B.
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Keogh, D.
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Komin, Nu.
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Kosack, K.
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Lamanna, G.
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Lenain, J. -P
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Lohse, T.
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Marandon, V.
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Martin, J. M.
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Martineau-Huynh, ...
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Marcowith, A.
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Maurin, D.
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McComb, T. J. L.
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Medina, M. C.
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Moderski, R.
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Moulin, E.
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Naumann-Godo, M.
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de Naurois, M.
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Nedbal, D.
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Nekrassov, D.
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Niemiec, J.
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Nolan, S. J.
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Ohm, S.
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Olive, J. -F
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Wilhelmi, E. de ...
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Orford, K. J.
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Ostrowski, M.
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Panter, M.
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Arribas, M. Paz
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Pedaletti, G.
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Pelletier, G.
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Petrucci, P. -O
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Pita, S.
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Puehlhofer, G.
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Punch, M.
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Quirrenbach, A.
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Raubenheimer, B. ...
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Raue, M.
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Rayner, S. M.
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Renaud, M.
-
Rieger, F.
-
Ripken, J.
-
Rob, L.
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Rosier-Lees, S.
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Rowell, G.
-
Rudak, B.
-
Rulten, C. B.
-
Ruppel, J.
-
Sahakian, V.
-
Santangelo, A.
-
Schlickeiser, R.
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Schoeck, F. M.
-
Schroeder, R.
-
Schwanke, U.
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Schwarzburg, S.
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Schwemmer, S.
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Shalchi, A.
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Skilton, J. L.
-
Sol, H.
-
Spangler, D.
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Stawarz, L.
-
Steenkamp, R.
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Stegmann, C.
-
Superina, G.
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Szostek, A.
-
Tam, P. H.
-
Tavernet, J. -P
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Terrier, R.
-
Tibolla, O.
-
van Eldik, C.
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Vasileiadis, G.
-
Venter, C.
-
Venter, L.
-
Vialle, J. P.
-
Vincent, P.
-
Vivier, M.
-
Voelk, H. J.
-
Volpe, F.
-
Wagner, S. J.
-
Ward, M.
-
Zdziarski, A. A.
-
Zech, A.
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