gamma-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes
Colin P, Eisenacher D, Hildebrand D, Lombardi S, Lindorfs E, Paneque D, Partini S, Prada F, Sitarek J, Zandanel F, Dauser T, Kadler M, Krauß F, Kataoka J, Pfrommer C, Pinzke A, Takahashi Y, Wilbert S, Wilms J (2012)
Publication Status: Published
Publication Type: Conference contribution
Publication year: 2012
Journal
Book Volume: 1505
Pages Range: 578-581
DOI: 10.1063/1.4772326
Abstract
The Perseus cluster of galaxies is a nearby cool-core cluster with an intra-cluster medium (ICM) characterized by very high central densities. The observation of the Perseus cluster with the MAGIC telescopes, during 85 h from 2009 to 2011, resulted in the discovery of 2 point-like sources at very high energy (>100GeV, VHE) coinciding with the central radio galaxy NGC1275 and the radio galaxy IC 310. The gamma-ray properties of these 2 sources are presented, taking into account contemporaneous Fermi-LAT as well as multi-wavelength data. Flux variability and spectral energy distribution shapes indicate that the VHE gamma-rays do not originate from large-scale interaction of the radio galaxies with ICM but more likely from the active nuclei of these two galaxies. They could be both misaligned version of BL Lac objects, the most common TeV AGN. Our results provide vital clues to understand emission mechanisms of such misaligned objects, and how they may be related to the beamed emission seen in BL Lacs. No evidence of large-scale VHE gamma-ray emission from hadronic cosmic ray (CR) interactions with the ICM has been found. The flux upper limit above 1 TeV reaches the signal expected by some theoretical models, constraining the cluster CR physics. In the framework of the hadronic model of the radiomini-halos, this limit implies a minimal magnetic field ranging from 4-9 mu G for the central cluster region.
Authors with CRIS profile
Thomas Dauser
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Felicia Krauß
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Jörn Wilms
Professur für Astronomie und Astrophysik
Involved external institutions
University of Turku / Turun yliopisto
Finland (FI)
École Polytechnique Fédérale de Lausanne (EPFL)
Switzerland (CH)
Julius-Maximilians-Universität Würzburg
Germany (DE)
Max-Planck-Institut für Physik (Werner-Heisenberg-Institut, MPP) / Max Planck Institute for Physics
Germany (DE)
Waseda University / 早稲田大学
Japan (JP)
University of California
United States (USA) (US)
Heidelberg Institute for Theoretical Studies GmbH (HITS)
Germany (DE)
Institut de Fisica d'Altes Energies (IFAE) / The Institute for High Energy Physics
Spain (ES)
Institute of Astrophysics of Andalusia / Instituto de Astrofísica de Andalucía (IAA-CSIC)
Spain (ES)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
Finland (FI)
École Polytechnique Fédérale de Lausanne (EPFL)
Switzerland (CH)
Julius-Maximilians-Universität Würzburg
Germany (DE)
Max-Planck-Institut für Physik (Werner-Heisenberg-Institut, MPP) / Max Planck Institute for Physics
Germany (DE)
Waseda University / 早稲田大学
Japan (JP)
University of California
United States (USA) (US)
Heidelberg Institute for Theoretical Studies GmbH (HITS)
Germany (DE)
Institut de Fisica d'Altes Energies (IFAE) / The Institute for High Energy Physics
Spain (ES)
Institute of Astrophysics of Andalusia / Instituto de Astrofísica de Andalucía (IAA-CSIC)
Spain (ES)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
How to cite
APA:
Colin, P., Eisenacher, D., Hildebrand, D., Lombardi, S., Lindorfs, E., Paneque, D.,... Wilms, J. (2012). gamma-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes. (pp. 578-581).
MLA:
Colin, P., et al. "gamma-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes." 2012. 578-581.
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