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Search: (WFRF:(Almeida J)) pers:(Petrucci P. O) > (2009) > Very high energy ga...

Very high energy gamma-ray observations of the galaxy clusters Abell 496 and Abell 85 with HESS

Aharonian, F. (author)
Akhperjanian, A. G. (author)
Anton, G. (author)
show more...
de Almeida, U. Barres (author)
Bazer-Bachi, A. R. (author)
Becherini, Yvonne (author)
Behera, B. (author)
Bernloehr, K. (author)
Boisson, C. (author)
Bochow, A. (author)
Borrel, V. (author)
Braun, I. (author)
Brion, E. (author)
Brucker, J. (author)
Brun, P. (author)
Buehler, R. (author)
Bulik, T. (author)
Buesching, I. (author)
Boutelier, T. (author)
Chadwick, P. M. (author)
Charbonnier, A. (author)
Chaves, R. C. G. (author)
Cheesebrough, A. (author)
Chounet, L. -M (author)
Clapson, A. C. (author)
Coignet, G. (author)
Dalton, M. (author)
Daniel, M. K. (author)
Degrange, B. (author)
Deil, C. (author)
Dickinson, H. J. (author)
Djannati-Atai, A. (author)
Domainko, W. (author)
Drury, L. O 'C. (author)
Dubois, F. (author)
Dubus, G. (author)
Dyks, J. (author)
Dyrda, M. (author)
Egberts, K. (author)
Emmanoulopoulos, D. (author)
Espigat, P. (author)
Farnier, C. (author)
Feinstein, F. (author)
Fiasson, A. (author)
Foerster, A. (author)
Fontaine, G. (author)
Fuessling, M. (author)
Gabici, S. (author)
Gallant, Y. A. (author)
Gerard, L. (author)
Giebels, B. (author)
Glicenstein, J. F. (author)
Glueck, B. (author)
Goret, P. (author)
Hauser, D. (author)
Hauser, M. (author)
Heinz, S. (author)
Heinzelmann, G. (author)
Henri, G. (author)
Hermann, G. (author)
Hinton, J. A. (author)
Hoffmann, A. (author)
Hofmann, W. (author)
Holleran, M. (author)
Hoppe, S. (author)
Horns, D. (author)
Jacholkowska, A. (author)
de Jager, O. C. (author)
Jung, I. (author)
Katarzynski, K. (author)
Katz, U. (author)
Kaufmann, S. (author)
Kendziorra, E. (author)
Kerschhaggl, M. (author)
Khangulyan, D. (author)
Khelifi, B. (author)
Keogh, D. (author)
Komin, Nu. (author)
Kosack, K. (author)
Lamanna, G. (author)
Lenain, J. -P (author)
Lohse, T. (author)
Marandon, V. (author)
Martin, J. M. (author)
Martineau-Huynh, O. (author)
Marcowith, A. (author)
Maurin, D. (author)
McComb, T. J. L. (author)
Medina, M. C. (author)
Moderski, R. (author)
Moulin, E. (author)
Naumann-Godo, M. (author)
de Naurois, M. (author)
Nedbal, D. (author)
Nekrassov, D. (author)
Niemiec, J. (author)
Nolan, S. J. (author)
Ohm, S. (author)
Olive, J. -F (author)
Wilhelmi, E. de Ona (author)
Orford, K. J. (author)
Ostrowski, M. (author)
Panter, M. (author)
Arribas, M. Paz (author)
Pedaletti, G. (author)
Pelletier, G. (author)
Petrucci, P. -O (author)
Pita, S. (author)
Puehlhofer, G. (author)
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
Quirrenbach, A. (author)
Raubenheimer, B. C. (author)
Raue, M. (author)
Rayner, S. M. (author)
Renaud, M. (author)
Rieger, F. (author)
Ripken, J. (author)
Rob, L. (author)
Rosier-Lees, S. (author)
Rowell, G. (author)
Rudak, B. (author)
Rulten, C. B. (author)
Ruppel, J. (author)
Sahakian, V. (author)
Santangelo, A. (author)
Schlickeiser, R. (author)
Schoeck, F. M. (author)
Schroeder, R. (author)
Schwanke, U. (author)
Schwarzburg, S. (author)
Schwemmer, S. (author)
Shalchi, A. (author)
Skilton, J. L. (author)
Sol, H. (author)
Spangler, D. (author)
Stawarz, L. (author)
Steenkamp, R. (author)
Stegmann, C. (author)
Superina, G. (author)
Szostek, A. (author)
Tam, P. H. (author)
Tavernet, J. -P (author)
Terrier, R. (author)
Tibolla, O. (author)
van Eldik, C. (author)
Vasileiadis, G. (author)
Venter, C. (author)
Venter, L. (author)
Vialle, J. P. (author)
Vincent, P. (author)
Vivier, M. (author)
Voelk, H. J. (author)
Volpe, F. (author)
Wagner, S. J. (author)
Ward, M. (author)
Zdziarski, A. A. (author)
Zech, A. (author)
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 (creator_code:org_t)
2008-12-22
2009
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 495:1, s. 27-35
  • Journal article (peer-reviewed)
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
Aharonian, F.
Akhperjanian, A. ...
Anton, G.
de Almeida, U. B ...
Bazer-Bachi, A. ...
Becherini, Yvonn ...
show more...
Behera, B.
Bernloehr, K.
Boisson, C.
Bochow, A.
Borrel, V.
Braun, I.
Brion, E.
Brucker, J.
Brun, P.
Buehler, R.
Bulik, T.
Buesching, I.
Boutelier, T.
Chadwick, P. M.
Charbonnier, A.
Chaves, R. C. G.
Cheesebrough, A.
Chounet, L. -M
Clapson, A. C.
Coignet, G.
Dalton, M.
Daniel, M. K.
Degrange, B.
Deil, C.
Dickinson, H. J.
Djannati-Atai, A ...
Domainko, W.
Drury, L. O 'C.
Dubois, F.
Dubus, G.
Dyks, J.
Dyrda, M.
Egberts, K.
Emmanoulopoulos, ...
Espigat, P.
Farnier, C.
Feinstein, F.
Fiasson, A.
Foerster, A.
Fontaine, G.
Fuessling, M.
Gabici, S.
Gallant, Y. A.
Gerard, L.
Giebels, B.
Glicenstein, J. ...
Glueck, B.
Goret, P.
Hauser, D.
Hauser, M.
Heinz, S.
Heinzelmann, G.
Henri, G.
Hermann, G.
Hinton, J. A.
Hoffmann, A.
Hofmann, W.
Holleran, M.
Hoppe, S.
Horns, D.
Jacholkowska, A.
de Jager, O. C.
Jung, I.
Katarzynski, K.
Katz, U.
Kaufmann, S.
Kendziorra, E.
Kerschhaggl, M.
Khangulyan, D.
Khelifi, B.
Keogh, D.
Komin, Nu.
Kosack, K.
Lamanna, G.
Lenain, J. -P
Lohse, T.
Marandon, V.
Martin, J. M.
Martineau-Huynh, ...
Marcowith, A.
Maurin, D.
McComb, T. J. L.
Medina, M. C.
Moderski, R.
Moulin, E.
Naumann-Godo, M.
de Naurois, M.
Nedbal, D.
Nekrassov, D.
Niemiec, J.
Nolan, S. J.
Ohm, S.
Olive, J. -F
Wilhelmi, E. de ...
Orford, K. J.
Ostrowski, M.
Panter, M.
Arribas, M. Paz
Pedaletti, G.
Pelletier, G.
Petrucci, P. -O
Pita, S.
Puehlhofer, G.
Punch, M.
Quirrenbach, A.
Raubenheimer, B. ...
Raue, M.
Rayner, S. M.
Renaud, M.
Rieger, F.
Ripken, J.
Rob, L.
Rosier-Lees, S.
Rowell, G.
Rudak, B.
Rulten, C. B.
Ruppel, J.
Sahakian, V.
Santangelo, A.
Schlickeiser, R.
Schoeck, F. M.
Schroeder, R.
Schwanke, U.
Schwarzburg, S.
Schwemmer, S.
Shalchi, A.
Skilton, J. L.
Sol, H.
Spangler, D.
Stawarz, L.
Steenkamp, R.
Stegmann, C.
Superina, G.
Szostek, A.
Tam, P. H.
Tavernet, J. -P
Terrier, R.
Tibolla, O.
van Eldik, C.
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.
show less...
About the subject
NATURAL SCIENCES
NATURAL SCIENCES
and Physical Science ...
and Astronomy Astrop ...
Articles in the publication
Astronomy and As ...
By the university
Linnaeus University

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