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    The disturbance of a millisecond pulsar magnetosphere

    Access Status
    Open access via publisher
    Authors
    Shannon, Ryan
    Lentati, L.
    Kerr, M.
    Bailes, M.
    Bhat, N.
    Coles, W.
    Dai, S.
    Dempsey, J.
    Hobbs, G.
    Keith, M.
    Lasky, P.
    Levin, Y.
    Manchester, R.
    Oslowski, S.
    Ravi, V.
    Reardon, D.
    Rosado, P.
    Spiewak, R.
    Van Straten, W.
    Toomey, L.
    Wang, J.
    Wen, L.
    You, X.
    Zhu, X.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Shannon, R. and Lentati, L. and Kerr, M. and Bailes, M. and Bhat, N. and Coles, W. and Dai, S. et al. 2016. The disturbance of a millisecond pulsar magnetosphere. Astrophysical Journal Letters. 828 (1): L1.
    Source Title
    Astrophysical Journal Letters
    DOI
    10.3847/2041-8205/828/1/L1
    ISSN
    2041-8205
    School
    Curtin Institute of Radio Astronomy (Physics)
    URI
    http://hdl.handle.net/20.500.11937/8923
    Collection
    • Curtin Research Publications
    Abstract

    Pulsar timing has enabled some of the strongest tests of fundamental physics. Central to the technique is the assumption that the detected radio pulses can be used to accurately measure the rotation of the pulsar. Here, we report on a broadband variation in the pulse profile of the millisecond pulsar J1643−1224. A new component of emission suddenly appears in the pulse profile, decays over four months, and results in a permanently modified pulse shape. Profile variations such as these may be the origin of timing noise observed in other millisecond pulsars. The sensitivity of pulsar-timing observations to gravitational radiation can be increased by accounting for this variability.

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