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Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations with the Fermi Large Area Telescope

  • (The Fermi-LAT Collaboration)
  • Clemson University
  • Stanford Linear Accelerator Center
  • Stockholm University
  • Oskar Klein Centre
  • University of Pisa
  • INFN Sezione di Trieste
  • University of Trieste
  • INFN
  • University of Padova
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • INFN Sezione di Bari
  • INFN Sezione di Torino
  • University of Turin
  • Laboratoire Univers et Particules de Montpellier
  • c/o DESY
  • Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
  • Politecnico di Bari
  • INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
  • INFN Sezione di Perugia
  • University of Perugia
  • George Mason University
  • Science and Research Directorate
  • INAF Istituto di Radioastronomia
  • University of Bologna
  • and Physics University of Udine
  • Università Telematica Pegaso
  • Hiroshima University
  • Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
  • NASA Goddard Space Flight Center
  • University of Iceland
  • ISAS/JAXA
  • KTH Royal Institute of Technology
  • University of Sheffield
  • Sezione di Roma
  • Long Beach VA and University of California
  • University of Denver
  • Max-Planck-Institut für Physik
  • University of Innsbruck
  • NYCB Real-Time Computing Inc.
  • Pompeu Fabra University (UPF)
  • University of Maryland
  • Department of Physics
  • Naval Research Laboratory
  • University of Nova Gorica

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area Telescope data, we find no evidence for ALPs and exclude couplings above 5×10-12 GeV-1 for ALP masses 0.5ma5 neV at 95% confidence. The limits are competitive with the sensitivity of planned laboratory experiments, and, together with other bounds, strongly constrain the possibility that ALPs can reduce the γ-ray opacity of the Universe.

langue originaleAnglais
Numéro d'article161101
journalPhysical Review Letters
Volume116
Numéro de publication16
Les DOIs
étatPublié - 20 avr. 2016

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