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    Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9

    74854.pdf (1.420Mb)
    Access Status
    Open access
    Authors
    Bonafede, A.
    Intema, Hubertus
    Brüggen, M.
    Girardi, M.
    Nonino, M.
    Kantharia, N.
    Van Weeren, R.
    Röttgering, H.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bonafede, A. and Intema, H. and Brüggen, M. and Girardi, M. and Nonino, M. and Kantharia, N. and Van Weeren, R. et al. 2014. Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9. Astrophysical Journal. 785 (1): Article ID 1.
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/785/1/1
    ISSN
    0004-637X
    Remarks

    This is an author-created, un-copy edited version of an article accepted for publication in Astrophysical Journal. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/0004-637X/785/1/1.

    URI
    http://hdl.handle.net/20.500.11937/74569
    Collection
    • Curtin Research Publications
    Abstract

    Radio relics are diffuse radio sources observed in galaxy clusters, probably produced by shock acceleration during cluster-cluster mergers. Their large size, of the order of 1 Mpc, indicates that the emitting electrons need to be (re)accelerated locally. The usually invoked diffusive shock acceleration models have been challenged by recent observations and theory. We report the discovery of complex radio emission in the Galaxy cluster PLCKG287.0+32.9, which hosts two relics, a radio halo, and several radio filamentary emission. Optical observations suggest that the cluster is elongated, likely along an intergalactic filament, and displays a significant amount of substructure. The peculiar features of this radio relic are that (1) it appears to be connected to the lobes of a radio galaxy and (2) the radio spectrum steepens on either side of the radio relic. We discuss the origins of these features in the context of particle re-acceleration. © 2014. The American Astronomical Society. All rights reserved..

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