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
2016Type
Journal Article
Metadata
Show full item recordCitation
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
ISSN
School
Curtin Institute of Radio Astronomy (Physics)
Collection
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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