Confinement and diffusion time-scales of CR hadrons in AGN-inflated.

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dc.contributor.author Prokhorov, D.A.
dc.contributor.author Churazov, E.M.
dc.date.accessioned 2017-11-08T09:08:37Z
dc.date.available 2017-11-08T09:08:37Z
dc.date.issued 2017-09
dc.identifier.citation Prokhorov, D.A. and Churazov, E.M. 2017. Confinement and diffusion time-scales of CR hadrons in AGN-inflated. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 470(3), pp.3388-3394. en_ZA
dc.identifier.issn 0035-8711 (Print)
dc.identifier.issn 1365-2966 (Online)
dc.identifier.uri http://hdl.handle.net/10539/23388
dc.description.abstract While rich clusters are powerful sources of X-rays, γ -ray emission from these large cosmic structures has not been detected yet. X-ray radiative energy losses in the central regions of relaxed galaxy clusters are so strong that one needs to consider special sources of energy, likely active galactic nucleus (AGN) feedback, to suppress catastrophic cooling of the gas. We consider a model of AGN feedback that postulates that the AGN supplies the energy to the gas by inflating bubbles of relativistic plasma, whose energy content is dominated by cosmic-ray (CR) hadrons. If most of these hadrons can quickly escape the bubbles, then collisions of CRs with thermal protons in the intracluster medium (ICM) should lead to strong γ -ray emission, unless fast diffusion of CRs removes them from the cluster. Therefore, the lack of detections with modern γ -ray telescopes sets limits on the confinement time of CR hadrons in bubbles and CR diffusive propagation in the ICM. en_ZA
dc.language.iso en en_ZA
dc.publisher Oxford University Press (OUP) en_ZA
dc.rights This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. en_ZA
dc.subject Radiation mechanisms: non-thermal en_ZA
dc.subject Gamma rays: galaxies: clusters en_ZA
dc.subject GAMMA-RAY EMISSION en_ZA
dc.subject ACTIVE GALACTIC NUCLEI en_ZA
dc.subject GALAXY CLUSTERS en_ZA
dc.subject PERSEUS CLUSTER en_ZA
dc.subject COOLING FLOWS en_ZA
dc.subject NGC 1275 en_ZA
dc.subject MAGIC TELESCOPES en_ZA
dc.subject COSMIC-RAYS en_ZA
dc.subject XMM-NEWTON en_ZA
dc.subject FERMI en_ZA
dc.title Confinement and diffusion time-scales of CR hadrons in AGN-inflated. en_ZA
dc.type Article en_ZA
dc.journal.volume 470 en_ZA
dc.journal.title MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY en_ZA
dc.description.librarian EM2017 en_ZA
dc.citation.doi 10.1093/mnras/stx1404 en_ZA
dc.citation.epage 3394 en_ZA
dc.citation.issue 3 en_ZA
dc.citation.spage 3388 en_ZA
dc.funder Russian Scientific Foundation, grant No. 14-22-00271 en_ZA


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