Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/33270
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dc.contributor.authorDutson, K. L.-
dc.contributor.authorEdge, A. C.-
dc.contributor.authorHinton, James A.-
dc.contributor.authorHogan, M. T.-
dc.contributor.authorGurwell, M. A.-
dc.contributor.authorAlston, W. N.-
dc.date.accessioned2015-10-14T09:40:59Z-
dc.date.available2015-10-14T09:40:59Z-
dc.date.issued2014-06-17-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2014, 442 (3), pp. 2048-2057 (10)en
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966-
dc.identifier.urihttp://mnras.oxfordjournals.org/content/442/3/2048en
dc.identifier.urihttp://hdl.handle.net/2381/33270-
dc.description.abstractEmission from the active nucleus in the core of the brightest cluster galaxy of the Perseus cluster, NGC 1275, has varied dramatically over the past four decades. Prompted by the Fermi detection of flaring in the γ-ray band, we present the recent increased activity of this source in the context of its past radio and γ-ray output. The broad correspondence between the high-frequency radio data and the high-energy (HE) emission is striking. However, on short time-scales this correlation breaks down and the 1.3 mm Submillimeter Array flux is apparently unaffected during Fermi -detected flaring activity. The fact that NGC 1275 is also detected at TeV energies during the periods of HE γ-ray flaring suggests that the short-time-scale variation might be primarily related to changes in the inverse Compton scattering of photons by the electron population in the jet. The longer-time-scale changes suggest a 30–40 year variation in the fuelling of the black hole that affects the power of the inner jet. NCG 1275 is a laboratory for the class of brightest cluster galaxies, and its variability on these time-scales has implications for our understanding of massive galaxies in cooling-core clusters. The case of NGC 1275 highlights the need for wide coverage across the radio band to correctly account for the contribution to emission from a synchrotron self-absorbed core (for example when considering contamination of Sunyaev–Zel'dovich effect observations), and the danger of variability biases in radio surveys of galaxies.en
dc.language.isoenen
dc.publisherOxford University Press (OUP)en
dc.rightsThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.en
dc.subjectScience & Technologyen
dc.subjectPhysical Sciencesen
dc.subjectAstronomy & Astrophysicsen
dc.subjectASTRONOMY & ASTROPHYSICSen
dc.subjectradiation mechanisms: non-thermalen
dc.subjectgalaxies: activeen
dc.subjectgalaxies: clusters: individual: Perseusen
dc.subjectgalaxies: individual: NGC 1275en
dc.subjectgamma rays: galaxiesen
dc.subjectradio continuum: galaxiesen
dc.subjectACTIVE GALACTIC NUCLEIen
dc.subjectLARGE-AREA TELESCOPEen
dc.subjectMILLIMETER CONTINUUM MEASUREMENTSen
dc.subjectH-ALPHA FILAMENTSen
dc.subjectPERSEUS CLUSTERen
dc.subjectRAY-EMISSIONen
dc.subjectSOURCE CATALOGen
dc.subjectCOOLING FLOWSen
dc.subjectFLUX-DENSITYen
dc.subject3C 84en
dc.titleA non-thermal study of the brightest cluster galaxy NGC 1275-the Gamma-Radio connection over four decadesen
dc.typeJournal Articleen
dc.identifier.doi10.1093/mnras/stu975-
dc.description.statusPeer-revieweden
dc.description.versionPublisher Versionen
dc.type.subtypeArticle;Journal-
pubs.organisational-group/Organisationen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERINGen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomyen
dc.dateaccepted2014-05-14-
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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