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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Magic gamma-ray telescope observation of the perseus cluster of galaxies: Implications for cosmic rays, dark matter, and NGC 1275
Astrophysical Journal, Volume 710, No. 1, Year 2010
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Description
The Perseus galaxy cluster was observed by the MAGIC Cherenkov telescope for a total effective time of 24.4hr during 2008 November and December. The resulting upper limits on the γ-ray emission above 100 GeV are in the range of 4.6-7.5 × 10-12 cm-2 s-1 for spectral indices from -1.5 to -2.5, thereby constraining the emission produced by cosmic rays, dark matter annihilations, and the central radio galaxy NGC 1275. Results are compatible with cosmological cluster simulations for the cosmic-ray-induced γ-ray emission, constraining the average cosmic ray-to-thermal pressure to <4% for the cluster core region (<8% for the entire cluster). Using simplified assumptions adopted in earlier work (a power-law spectrum with an index of -2.1, constant cosmic ray-to-thermal pressure for the peripheral cluster regions while accounting for the adiabatic contraction during the cooling flow formation), we would limit the ratio of cosmic ray-to-thermal energy to E CR/E th < 3%. Improving the sensitivity of this observation by a factor of about 7 will enable us to scrutinize the hadronic model for the Perseus radio mini-halo: a non-detection of γ-ray emission at this level implies cosmic ray fluxes that are too small to produce enough electrons through hadronic interactions with the ambient gas protons to explain the observed synchrotron emission. The upper limit also translates into a level of γ-ray emission from possible annihilations of the cluster dark matter (the dominant mass component) that is consistent with boost factors of 104 for the typically expected dark matter annihilation-induced emission. Finally, the upper limits obtained for the γ-ray emission of the central radio galaxy NGC 1275 are consistent with the recent detection by the Fermi-LAT satellite. Due to the extremely large Doppler factors required for the jet, a one-zone synchrotron self-Compton model is implausible in this case. We reproduce the observed spectral energy density by using the structured jet (spine-layer) model which has previously been adopted to explain the high-energy emission of radio galaxies. © 2010. The American Astronomical Society.
Authors & Co-Authors
Aleksíc, Jelena
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Antonelli, Lucio Angelo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Antoranz, Pedro
Spain, Madrid
Universidad Complutense de Madrid
Backes, Michael
Germany, Dortmund
Technische Universität Dortmund
Baixeras, Cármen
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Balestra, Silvia
Spain, Madrid
Universidad Complutense de Madrid
Barrio, Juan Abel
Spain, Madrid
Universidad Complutense de Madrid
Bastieri, D.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Bednarek, Włodzimierz
Poland, Lodz
University of Lodz
Berdyugin, Andrei V.
Finland, Turku
Turun Yliopisto
Berger, Karsten
Finland, Turku
Turun Yliopisto
Bernardini, Elisa
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Biland, Adrian
Switzerland, Zurich
Eth Zürich
Bock, Rudolf K.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Bonnoli, Giacomo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Bordas, Pol
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Bosch-Ramón, Valentí
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Bose, Debanjan
Spain, Madrid
Universidad Complutense de Madrid
Braun, Isabel
Switzerland, Zurich
Eth Zürich
Bretz, Thomas
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Britzger, Daniel
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Carosi, Alessandro
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Colin, Pierre
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Commichau, Sebastian C.
Switzerland, Zurich
Eth Zürich
Contreras, José Luis
Spain, Madrid
Universidad Complutense de Madrid
Cortina, J.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Covino, Stefano
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Dazzi, Francesco
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
De Angelis, Alessandro D.
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
De Los Reyes, Raquel R.
Spain, Madrid
Universidad Complutense de Madrid
Germany, Heidelberg
Max-planck-institut Für Kernphysik
De Lotto, Barbara
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Doert, Marlene
Germany, Dortmund
Technische Universität Dortmund
Domínguez, A. D.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Prester, Dijana Dominis
Croatia, Split
University of Split
Dorner, Daniela
Switzerland, Zurich
Eth Zürich
Doro, Michele
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Elsässer, Dominik
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Errando, Manel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Ferenc, Daniela
Croatia, Split
University of Split
Fonseca, M. V.
Spain, Madrid
Universidad Complutense de Madrid
Font, Ll L.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Galante, Nicola
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Garczarczyk, Markus
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Gaug, Markus
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Godinović, Nikola
Croatia, Split
University of Split
Hadasch, Daniela
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Herrero Davó, Artemio Alonso
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Hildebrand, Dorothée
Switzerland, Zurich
Eth Zürich
Hose, Juergen
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hrupec, Dario
Croatia, Split
University of Split
Hsu, C. C.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Jogler, Tobias
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Klepser, Stefan
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Kranich, Daniel
Switzerland, Zurich
Eth Zürich
Laille, Alvin
United States, Davis
University of California, Davis
Lindfors, Elina J.
Finland, Turku
Turun Yliopisto
Lombardi, Saverio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Longo, Francesco
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
López-Moya, Marcos
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Lorenz, Eckhart
Switzerland, Zurich
Eth Zürich
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Majumdar, Pratik
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Maneva, Galina M.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Mankuzhiyil, Nijil
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Mannheim, Karl
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Maraschi, Laura
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Mariotti, M.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Martínez, Manel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Mazin, Daniel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Meucci, Mario
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Mirzoyan, Razmik G.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Miyamoto, Hiroko
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Moldón, Javier
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Moles, Mariano
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Moralejo, Abelardo
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Nieto, Daniel
Spain, Madrid
Universidad Complutense de Madrid
Nilsson, Kari
Finland, Turku
Turun Yliopisto
Oya, Igor
Spain, Madrid
Universidad Complutense de Madrid
Paiano, Simona
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Paoletti, Riccardo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Paredes, Josep Maria
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Pasanen, Mikko
Finland, Turku
Turun Yliopisto
Pascoli, Donatella
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Pauss, Felicitas
Switzerland, Zurich
Eth Zürich
Pegna, Raffaello G.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Pérez-Torres, M. A.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Persic, Massimo
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Osservatorio Astronomico Di Trieste
Peruzzo, Luigi
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Prada, Francisco
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Prandini, Elisa
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Puljak, Ivica
Croatia, Split
University of Split
Rhode, Wolfgang
Germany, Dortmund
Technische Universität Dortmund
Ribó, Marc
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Rico, Javier R.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Saggion, Antonio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Sánchez-Conde, Miguel A. A.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Scalzotto, Villi
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Schweizer, Thomas
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shayduk, Maxim
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shore, Steven N.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Sillanp̈äa, Aimo K.
Finland, Turku
Turun Yliopisto
Sitarek, Julian
Poland, Lodz
University of Lodz
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Sobczyńska, Dorota
Poland, Lodz
University of Lodz
Spanier, Felix
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Spiro, Susanna
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Stamerra, Antonio
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Takalo, Leo O.
Finland, Turku
Turun Yliopisto
Tavecchio, Fabrizio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Terzić, Tomislav
Croatia, Split
University of Split
Teshima, Masahiro
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Torres, Diego F.
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Zabalza, Víctor
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Zanin, Roberta
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Pfrommer, Christoph
Canada, Toronto
University of Toronto
Inoue, Susumu
Japan, Kyoto
Kyoto University
Statistics
Citations: 127
Authors: 114
Affiliations: 30
Identifiers
Doi:
10.1088/0004-637X/710/1/634
ISSN:
0004637X
Research Areas
Environmental