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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A
Monthly Notices of the Royal Astronomical Society, Volume 472, No. 3, Year 2017
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Description
It is widely believed that the bulk of the Galactic cosmic rays is accelerated in supernova remnants (SNRs). However, no observational evidence of the presence of particles of PeV energies in SNRs has yet been found. The young historical SNR Cassiopeia A (Cas A) appears as one of the best candidates to study acceleration processes. Between 2014 December and 2016 October, we observed Cas A with the MAGIC telescopes, accumulating 158 h of good quality data.We derived the spectrum of the source from 100 GeV to 10 TeV.We also analysed ~8 yr of Fermi-LAT to obtain the spectral shape between 60 MeV and 500 GeV. The spectra measured by the LAT andMAGIC telescopes are compatible within the errors and show a clear turn-off (4.6s) at the highest energies, which can be described with an exponential cut-off at Ec = 3.5(-1.0 +1.6)stat(-0.9 +0.8)sys TeV. The gamma-ray emission from 60 MeV to 10 TeV can be attributed to a population of high-energy protons with a spectral index of ~2.2 and an energy cut-off at ~10 TeV. This result indicates that Cas A is not contributing to the high energy (~PeV) cosmic ray sea in a significant manner at the present moment. A one-zone leptonic model fails to reproduce by itself the multiwavelength spectral energy distribution. Besides, if a non-negligible fraction of the flux seen by MAGIC is produced by leptons, the radiation should be emitted in a region with a low magnetic field (B ≲ 180 μG) like in the reverse shock. © 2017 The Authors.
Authors & Co-Authors
Ahnen, Max L.
Switzerland, Zurich
Eth Zürich
Ansoldi, Stefano
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Japan, Tokushima
Tokushima University
Antonelli, Lucio Angelo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Arcaro, Cornelia H.E.
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Babić, Ana
Croatia, Zagreb
University of Zagreb
Banerjee, Biswajit
India, Kolkata
Saha Institute of Nuclear Physics
Bangale, Priyadarshini
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Barres De Almeida, Ulisses
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Barrio, Juan Abel
Spain, Madrid
Universidad Complutense de Madrid
Becerra González, Josefa
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Bednarek, Włodzimierz
Poland, Lodz
University of Lodz
Bernardini, Elisa
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Germany, Berlin
Humboldt-universität zu Berlin
Berti, Alessio
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Bhattacharyya, Wrijupan
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Biasuzzi, Barbara
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Biland, Adrian
Switzerland, Zurich
Eth Zürich
Blanch, Oscar
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Bonnefoy, Simon
Spain, Madrid
Universidad Complutense de Madrid
Bonnoli, Giacomo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Carosi, Roberto
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Carosi, Alessandro
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Colak, M.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Colin, Pierre
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Colombo, E.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Contreras, José Luis
Spain, Madrid
Universidad Complutense de Madrid
Cortina, J.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Covino, Stefano
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Cumani, P.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
da Vela, Paolo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Dazzi, Francesco
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
De Angelis, Alessandro D.
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
De Lotto, Barbara
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
De Oña Wilhelmi, Emma
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Di Pierro, F.
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Doert, Marlene
Germany, Dortmund
Technische Universität Dortmund
Domínguez, A. D.
Spain, Madrid
Universidad Complutense de Madrid
Dominis-Prester, Dijana
Croatia, Zagreb
University of Zagreb
Dorner, Daniela
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Doro, Michele
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Einecke, Sabrina
Germany, Dortmund
Technische Universität Dortmund
Eisenacher Glawion, D.
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Elsässer, Dominik
Germany, Dortmund
Technische Universität Dortmund
Engelkemeier, M.
Germany, Dortmund
Technische Universität Dortmund
Fallah Ramazani, Vandad
Finland, Turku
Turun Yliopisto
Fernandez-Barral, Alba
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Fidalgo, David Carreto
Spain, Madrid
Universidad Complutense de Madrid
Fonseca, M. V.
Spain, Madrid
Universidad Complutense de Madrid
Font, Ll L.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Fruck, Christian
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Galindo, Daniel
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
García López, Ramón J.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Garczarczyk, Markus
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Gaug, Markus
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Giammaria, P.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Godinović, Nikola
Croatia, Zagreb
University of Zagreb
Góra, Dariusz
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Guberman, D.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Hadasch, Daniela
Japan, Tokushima
Tokushima University
Hahn, A.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hassan, Tarek
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Hayashida, Masaaki
Japan, Tokushima
Tokushima University
Herrera, Juan Carlos Helo
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Hose, Juergen
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hrupec, Dario
Croatia, Zagreb
University of Zagreb
Inada, Tomohiro
Japan, Tokushima
Tokushima University
Ishio, Kazuma
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Konno, Yusuke
Japan, Tokushima
Tokushima University
Kubo, Hidetoshi
Japan, Tokushima
Tokushima University
Kushida, Junko
Japan, Tokushima
Tokushima University
Kuveždić, D.
Croatia, Zagreb
University of Zagreb
Lelas, Damir
Croatia, Zagreb
University of Zagreb
Lindfors, Elina J.
Finland, Turku
Turun Yliopisto
Lombardi, Saverio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Longo, Francesco
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
López-Moya, Marcos
Spain, Madrid
Universidad Complutense de Madrid
Maggio, Camilla
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Majumdar, Pratik
India, Kolkata
Saha Institute of Nuclear Physics
Makariev, M. V.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Maneva, Galina M.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Manganaro, Marina
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Mannheim, Karl
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Maraschi, Laura
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Mariotti, M.
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Martínez, Manel
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Mazin, Daniel
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Japan, Tokushima
Tokushima University
Menzel, Uta
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Minev, Milen S.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Mirzoyan, Razmik G.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Moralejo, Abelardo
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Moreno, Victòria
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Moretti, Elena
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Neustroev, Vitaly V.
Finland, Turku
Turun Yliopisto
Maciołek-Niedźwiecki, Andrzej
Poland, Lodz
University of Lodz
Nievas-Rosillo, M.
Spain, Madrid
Universidad Complutense de Madrid
Nilsson, Kari
Finland, Turku
Turun Yliopisto
Nishijima, Kyoshi
Japan, Tokushima
Tokushima University
Noda, Koji
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Nogués, Leyre
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Paiano, Simona
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Palacio, Joaquim
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Paneque, David
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Paoletti, Riccardo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Paredes, Josep Maria
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Pedaletti, Giovanna
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Persic, Massimo
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Prada Moroni, Pier Giorgio
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Prandini, Elisa
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Puljak, Ivica
Croatia, Zagreb
University of Zagreb
Rhode, Wolfgang
Germany, Dortmund
Technische Universität Dortmund
Ribó, Marc
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Rico, Javier R.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Righi, Chiara
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Schweizer, Thomas
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shore, Steven N.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Sitarek, Julian
Poland, Lodz
University of Lodz
Sobczyńska, Dorota
Poland, Lodz
University of Lodz
Stamerra, Antonio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Takalo, Leo O.
Finland, Turku
Turun Yliopisto
Tavecchio, Fabrizio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Terzić, Tomislav
Croatia, Zagreb
University of Zagreb
Teshima, Masahiro
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Japan, Tokushima
Tokushima University
Treves, Aldo
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Vazquez Acosta, Monica
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Vovk, Ievgen
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Ward, John Ennis
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Statistics
Citations: 64
Authors: 125
Affiliations: 21
Identifiers
Doi:
10.1093/mnras/stx2079
ISSN:
00358711
Research Areas
Cancer
Environmental
Study Design
Cross Sectional Study