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

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dc.citation.doi10.1093/mnras/stx1404en_ZA
dc.citation.epage3394en_ZA
dc.citation.issue3en_ZA
dc.citation.spage3388en_ZA
dc.contributor.authorProkhorov, D.A.
dc.contributor.authorChurazov, E.M.
dc.date.accessioned2017-11-08T09:08:37Z
dc.date.available2017-11-08T09:08:37Z
dc.date.issued2017-09
dc.description.abstractWhile 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.description.librarianEM2017en_ZA
dc.funderRussian Scientific Foundation, grant No. 14-22-00271en_ZA
dc.identifier.citationProkhorov, 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.issn0035-8711 (Print)
dc.identifier.issn1365-2966 (Online)
dc.identifier.urihttp://hdl.handle.net/10539/23388
dc.journal.titleMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETYen_ZA
dc.journal.volume470en_ZA
dc.language.isoenen_ZA
dc.publisherOxford University Press (OUP)en_ZA
dc.rightsThis 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.subjectRadiation mechanisms: non-thermalen_ZA
dc.subjectGamma rays: galaxies: clustersen_ZA
dc.subjectGAMMA-RAY EMISSIONen_ZA
dc.subjectACTIVE GALACTIC NUCLEIen_ZA
dc.subjectGALAXY CLUSTERSen_ZA
dc.subjectPERSEUS CLUSTERen_ZA
dc.subjectCOOLING FLOWSen_ZA
dc.subjectNGC 1275en_ZA
dc.subjectMAGIC TELESCOPESen_ZA
dc.subjectCOSMIC-RAYSen_ZA
dc.subjectXMM-NEWTONen_ZA
dc.subjectFERMIen_ZA
dc.titleConfinement and diffusion time-scales of CR hadrons in AGN-inflated.en_ZA
dc.typeArticleen_ZA
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