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GeV GAMMA-RAY FLUX UPPER LIMITS FROM CLUSTERS OF GALAXIES
- Ackermann, M. (author)
- Ajello, M. (author)
- Allafort, A. (author)
- show more...
- Baldini, L. (author)
- Ballet, J. (author)
- Barbiellini, G. (author)
- Bastieri, D. (author)
- Bechtol, K. (author)
- Bellazzini, R. (author)
- Blandford, R. D. (author)
- Blasi, P. (author)
- Bloom, E. D. (author)
- Bonamente, E. (author)
- Borgland, A. W. (author)
- Bouvier, A. (author)
- Brandt, T. J. (author)
- Bregeon, J. (author)
- Brigida, M. (author)
- Bruel, P. (author)
- Buehler, R. (author)
- Buson, S. (author)
- Caliandro, G. A. (author)
- Cameron, R. A. (author)
- Caraveo, P. A. (author)
- Carrigan, S. (author)
- Casandjian, J. M. (author)
- Cavazzuti, E. (author)
- Cecchi, C. (author)
- Celik, Oe (author)
- Charles, E. (author)
- Chekhtman, A. (author)
- Cheung, C. C. (author)
- Chiang, J. (author)
- Ciprini, S. (author)
- Claus, R. (author)
- Cohen-Tanugi, J. (author)
- Colafrancesco, S. (author)
- Cominsky, L. R. (author)
- Dermer, C. D. (author)
- de Palma, F. (author)
- Silva, E. do Couto e (author)
- Drell, P. S. (author)
- Dubois, R. (author)
- Dumora, D. (author)
- Edmonds, Y. (author)
- Farnier, C. (author)
- Favuzzi, C. (author)
- Frailis, M. (author)
- Fukazawa, Y. (author)
- Funk, S. (author)
- Fusco, P. (author)
- Gargano, F. (author)
- Gasparrini, D. (author)
- Gehrels, N. (author)
- Germani, S. (author)
- Giglietto, N. (author)
- Giordano, F. (author)
- Giroletti, M. (author)
- Glanzman, T. (author)
- Godfrey, G. (author)
- Grenier, I. A. (author)
- Grondin, M. -H (author)
- Guiriec, S. (author)
- Hadasch, D. (author)
- Harding, A. K. (author)
- Hayashida, M. (author)
- Hays, E. (author)
- Horan, D. (author)
- Hughes, R. E. (author)
- Jeltema, T. E. (author)
- Johannesson, G. (author)
- Johnson, A. S. (author)
- Johnson, T. J. (author)
- Johnson, W. N. (author)
- Kamae, T. (author)
- Katagiri, H. (author)
- Kataoka, J. (author)
- Kerr, M. (author)
- Knoedlseder, J. (author)
- Kuss, M. (author)
- Lande, J. (author)
- Latronico, L. (author)
- Lee, S. -H (author)
- Lemoine-Goumard, M. (author)
- Longo, F. (author)
- Loparco, F. (author)
- Lott, B. (author)
- Lovellette, M. N. (author)
- Lubrano, P. (author)
- Madejski, G. M. (author)
- Makeev, A. (author)
- Mazziotta, M. N. (author)
- Michelson, P. F. (author)
- Mitthumsiri, W. (author)
- Mizuno, T. (author)
- Moiseev, A. A. (author)
- Monte, C. (author)
- Monzani, M. E. (author)
- Morselli, A. (author)
- Moskalenko, I. V. (author)
- Murgia, S. (author)
- Naumann-Godo, M. (author)
- Nolan, P. L. (author)
- Norris, J. P. (author)
- Nuss, E. (author)
- Ohsugi, T. (author)
- Omodei, N. (author)
- Orlando, E. (author)
- Ormes, J. F. (author)
- Ozaki, M. (author)
- Paneque, D. (author)
- Panetta, J. H. (author)
- Pepe, M. (author)
- Pesce-Rollins, M. (author)
- Petrosian, V. (author)
- Pfrommer, C. (author)
- Piron, F. (author)
- Porter, T. A. (author)
- Profumo, S. (author)
- Raino, S. (author)
- Rando, R. (author)
- Razzano, M. (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Reposeur, T. (author)
- Ritz, S. (author)
- Rodriguez, A. Y. (author)
- Romani, R. W. (author)
- Roth, M. (author)
- Sadrozinski, H. F. -W (author)
- Sander, A. (author)
- Parkinson, P. M. Saz (author)
- Scargle, J. D. (author)
- Sgro, C. (author)
- Siskind, E. J. (author)
- Smith, P. D. (author)
- Spandre, G. (author)
- Spinelli, P. (author)
- Starck, J. -L (author)
- Stawarz, L. (author)
- Strickman, M. S. (author)
- Strong, A. W. (author)
- Suson, D. J. (author)
- Tajima, H. (author)
- Takahashi, H. (author)
- Takahashi, T. (author)
- Tanaka, T. (author)
- Thayer, J. B. (author)
- Thayer, J. G. (author)
- Tibaldo, L. (author)
- Tibolla, O. (author)
- Torres, D. F. (author)
- Tosti, G. (author)
- Tramacere, A. (author)
- Uchiyama, Y. (author)
- Usher, T. L. (author)
- Vandenbroucke, J. (author)
- Vasileiou, V. (author)
- Vilchez, N. (author)
- Vitale, V. (author)
- Waite, A. P. (author)
- Wang, P. (author)
- Winer, B. L. (author)
- Wood, K. S. (author)
- Ziegler, M. (author)
- show less...
- (creator_code:org_t)
- 2010
- 2010
- English.
- In: ASTROPHYS J LETT. - 2041-8205. ; 717:1, s. l71-L78
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The detection of diffuse radio emission associated with clusters of galaxies indicates populations of relativistic leptons infusing the intracluster medium (ICM). Those electrons and positrons are either injected into and accelerated directly in the ICM, or produced as secondary pairs by cosmic-ray ions scattering on ambient protons. Radiation mechanisms involving the energetic leptons together with the decay of neutral pions produced by hadronic interactions have the potential to produce abundant GeV photons. Here, we report on the search for GeV emission from clusters of galaxies using data collected by the Large Area Telescope on the Fermi Gamma-ray Space Telescope from 2008 August to 2010 February. Thirty-three galaxy clusters have been selected according to their proximity and high mass, X-ray flux and temperature, and indications of non-thermal activity for this study. We report upper limits on the photon flux in the range 0.2-100 GeV toward a sample of observed clusters (typical values (1-5) x 10(-9) photon cm(-2) s(-1)) considering both point-like and spatially resolved models for the high-energy emission and discuss how these results constrain the characteristics of energetic leptons and hadrons, and magnetic fields in the ICM. The volume-averaged relativistic-hadron-to-thermal energy density ratio is found to be <5%-10% in several clusters.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- cosmic rays
- galaxies: clusters: general
- gamma rays: galaxies: clusters
- radiation mechanisms: non-thermal
- NATURAL SCIENCES
- NATURVETENSKAP
- Astronomy and astrophysics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- ASTROPHYS J LETT (Search for host publication in LIBRIS)
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- By the author/editor
- Ackermann, M.
- Ajello, M.
- Allafort, A.
- Baldini, L.
- Ballet, J.
- Barbiellini, G.
- show more...
- Bastieri, D.
- Bechtol, K.
- Bellazzini, R.
- Blandford, R. D.
- Blasi, P.
- Bloom, E. D.
- Bonamente, E.
- Borgland, A. W.
- Bouvier, A.
- Brandt, T. J.
- Bregeon, J.
- Brigida, M.
- Bruel, P.
- Buehler, R.
- Buson, S.
- Caliandro, G. A.
- Cameron, R. A.
- Caraveo, P. A.
- Carrigan, S.
- Casandjian, J. M ...
- Cavazzuti, E.
- Cecchi, C.
- Celik, Oe
- Charles, E.
- Chekhtman, A.
- Cheung, C. C.
- Chiang, J.
- Ciprini, S.
- Claus, R.
- Cohen-Tanugi, J.
- Colafrancesco, S ...
- Cominsky, L. R.
- Conrad, Jan
- Dermer, C. D.
- de Palma, F.
- Silva, E. do Cou ...
- Drell, P. S.
- Dubois, R.
- Dumora, D.
- Edmonds, Y.
- Farnier, C.
- Favuzzi, C.
- Frailis, M.
- Fukazawa, Y.
- Funk, S.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Gehrels, N.
- Germani, S.
- Giglietto, N.
- Giordano, F.
- Giroletti, M.
- Glanzman, T.
- Godfrey, G.
- Grenier, I. A.
- Grondin, M. -H
- Guiriec, S.
- Hadasch, D.
- Harding, A. K.
- Hayashida, M.
- Hays, E.
- Horan, D.
- Hughes, R. E.
- Jeltema, T. E.
- Johannesson, G.
- Johnson, A. S.
- Johnson, T. J.
- Johnson, W. N.
- Kamae, T.
- Katagiri, H.
- Kataoka, J.
- Kerr, M.
- Knoedlseder, J.
- Kuss, M.
- Lande, J.
- Latronico, L.
- Lee, S. -H
- Lemoine-Goumard, ...
- Longo, F.
- Loparco, F.
- Lott, B.
- Lovellette, M. N ...
- Lubrano, P.
- Madejski, G. M.
- Makeev, A.
- Mazziotta, M. N.
- Michelson, P. F.
- Mitthumsiri, W.
- Mizuno, T.
- Moiseev, A. A.
- Monte, C.
- Monzani, M. E.
- Morselli, A.
- Moskalenko, I. V ...
- Murgia, S.
- Naumann-Godo, M.
- Nolan, P. L.
- Norris, J. P.
- Nuss, E.
- Ohsugi, T.
- Omodei, N.
- Orlando, E.
- Ormes, J. F.
- Ozaki, M.
- Paneque, D.
- Panetta, J. H.
- Pepe, M.
- Pesce-Rollins, M ...
- Petrosian, V.
- Pfrommer, C.
- Piron, F.
- Porter, T. A.
- Profumo, S.
- Raino, S.
- Rando, R.
- Razzano, M.
- Reimer, A.
- Reimer, O.
- Reposeur, T.
- Ripken, Joachim
- Ritz, S.
- Rodriguez, A. Y.
- Romani, R. W.
- Roth, M.
- Sadrozinski, H. ...
- Sander, A.
- Parkinson, P. M. ...
- Scargle, J. D.
- Sgro, C.
- Siskind, E. J.
- Smith, P. D.
- Spandre, G.
- Spinelli, P.
- Starck, J. -L
- Stawarz, L.
- Strickman, M. S.
- Strong, A. W.
- Suson, D. J.
- Tajima, H.
- Takahashi, H.
- Takahashi, T.
- Tanaka, T.
- Thayer, J. B.
- Thayer, J. G.
- Tibaldo, L.
- Tibolla, O.
- Torres, D. F.
- Tosti, G.
- Tramacere, A.
- Uchiyama, Y.
- Usher, T. L.
- Vandenbroucke, J ...
- Vasileiou, V.
- Vilchez, N.
- Vitale, V.
- Waite, A. P.
- Wang, P.
- Winer, B. L.
- Wood, K. S.
- Yang, Zhaoyu
- Ylinen, Tomi
- Ziegler, M.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
- Articles in the publication
- ASTROPHYS J LETT
- By the university
- Stockholm University
- Royal Institute of Technology
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