Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes

MAGIC Collaboration

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The Perseus cluster of galaxies is a nearby cool-core cluster with an intra-clustermedium (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 (>100 GeV, VHE) coinciding with the central radio galaxy NGC1275 and the radio galaxy IC310. The γ-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 γ-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 γ-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 hadronicmodel of the radiomini-halos, this limit implies aminimal magnetic field ranging from 4-9μG for the central cluster region.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages578-581
Number of pages4
Volume1505
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event5th International Meeting on High Energy Gamma-Ray Astronomy - Heidelberg
Duration: 2012 Jul 92012 Jul 13

Other

Other5th International Meeting on High Energy Gamma-Ray Astronomy
CityHeidelberg
Period12/7/912/7/13

Fingerprint

rays
telescopes
galaxies
radio galaxies
cosmic rays
spectral energy distribution
point sources
halos
interactions
physics
nuclei
magnetic fields
wavelengths
energy

Keywords

  • γ-ray astronomy
  • Cosmic rays
  • Galaxy Cluster
  • IC 310
  • NGC 1275
  • Radio galaxy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

MAGIC Collaboration (2012). Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes. In AIP Conference Proceedings (Vol. 1505, pp. 578-581) https://doi.org/10.1063/1.4772326

Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes. / MAGIC Collaboration.

AIP Conference Proceedings. Vol. 1505 2012. p. 578-581.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

MAGIC Collaboration 2012, Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes. in AIP Conference Proceedings. vol. 1505, pp. 578-581, 5th International Meeting on High Energy Gamma-Ray Astronomy, Heidelberg, 12/7/9. https://doi.org/10.1063/1.4772326
MAGIC Collaboration. Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes. In AIP Conference Proceedings. Vol. 1505. 2012. p. 578-581 https://doi.org/10.1063/1.4772326
MAGIC Collaboration. / Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes. AIP Conference Proceedings. Vol. 1505 2012. pp. 578-581
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title = "Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes",
abstract = "The Perseus cluster of galaxies is a nearby cool-core cluster with an intra-clustermedium (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 (>100 GeV, VHE) coinciding with the central radio galaxy NGC1275 and the radio galaxy IC310. The γ-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 γ-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 γ-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 hadronicmodel of the radiomini-halos, this limit implies aminimal magnetic field ranging from 4-9μG for the central cluster region.",
keywords = "γ-ray astronomy, Cosmic rays, Galaxy Cluster, IC 310, NGC 1275, Radio galaxy",
author = "{MAGIC Collaboration} and P. Colin and D. Eisenacher and D. Hildebrand and S. Lombardi and E. Lindfors and D. Paneque and S. Partini and F. Prada and J. Sitarek and F. Zandanel and T. Dauser and M. Kadler and F. Krauss and J. Kataoka and Jun Kataoka and A. Pinzke and Y. Takahashi and S. Wilbert and J. Wilms",
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T1 - Γ-ray emission from the Perseus cluster of galaxies observed with the MAGIC telescopes

AU - MAGIC Collaboration

AU - Colin, P.

AU - Eisenacher, D.

AU - Hildebrand, D.

AU - Lombardi, S.

AU - Lindfors, E.

AU - Paneque, D.

AU - Partini, S.

AU - Prada, F.

AU - Sitarek, J.

AU - Zandanel, F.

AU - Dauser, T.

AU - Kadler, M.

AU - Krauss, F.

AU - Kataoka, J.

AU - Kataoka, Jun

AU - Pinzke, A.

AU - Takahashi, Y.

AU - Wilbert, S.

AU - Wilms, J.

PY - 2012

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N2 - The Perseus cluster of galaxies is a nearby cool-core cluster with an intra-clustermedium (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 (>100 GeV, VHE) coinciding with the central radio galaxy NGC1275 and the radio galaxy IC310. The γ-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 γ-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 γ-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 hadronicmodel of the radiomini-halos, this limit implies aminimal magnetic field ranging from 4-9μG for the central cluster region.

AB - The Perseus cluster of galaxies is a nearby cool-core cluster with an intra-clustermedium (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 (>100 GeV, VHE) coinciding with the central radio galaxy NGC1275 and the radio galaxy IC310. The γ-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 γ-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 γ-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 hadronicmodel of the radiomini-halos, this limit implies aminimal magnetic field ranging from 4-9μG for the central cluster region.

KW - γ-ray astronomy

KW - Cosmic rays

KW - Galaxy Cluster

KW - IC 310

KW - NGC 1275

KW - Radio galaxy

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U2 - 10.1063/1.4772326

DO - 10.1063/1.4772326

M3 - Conference contribution

SN - 9780735411234

VL - 1505

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BT - AIP Conference Proceedings

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