Published September 1, 2016
| Submitted + Published
Journal Article
Open
The disturbance of a millisecond pulsar magnetosphere
- Creators
- Shannon, R. M.
- Lentati, L. T.
- Kerr, M.
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Bailes, M.
- Bhat, N. D. R.
- Coles, W. A.
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Dai, S.
- Dempsey, J.
- Hobbs, G.
- Keith, M. J.
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Lasky, P. D.
- Levin, Y.
- Manchester, R. N.
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Osłowski, S.
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Ravi, V.
- Reardon, D. J.
- Rosado, P. A.
- Spiewak, R.
- van Straten, W.
- Toomey, L.
- Wang, J.-B.
- Wen, L.
- You, X.-P.
- Zhu, X.-J.
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.
Additional Information
© 2016 American Astronomical Society. Received 2016 July 5; revised 2016 August 4; accepted 2016 August 5; published 2016 August 22. The Parkes radio telescope is part of the Australia Telescope, which is funded by the Commonwealth of Australia for operation as a National Facility managed by the Commonwealth Science and Industrial Research Organization (CSIRO). The Parkes Pulsar Timing Array Project project was initiated with support from an Australian Research Council (ARC) Federation Fellowship (FF0348478) to R.N.M. and from the CSIRO under that fellowship program. The PPTA project has also received support from the ARC through Discovery Project grants DP0985272 and DP140102578. N.D.R.B. acknowledge support form a Curtin University research fellowship. G.H. and Y.L. are recipients of ARC Future Fellowships (respectively, FT120100595 and FT110100384). S.O. is supported by the Alexander von Humboldt Foundation. R.M.S. acknowledges travel support from the CSIRO through a John Philip award for excellence in early career research.Attached Files
Published - apjl_828_1_L1.pdf
Submitted - 1608.02163v1.pdf
Files
1608.02163v1.pdf
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Additional details
- Eprint ID
- 69892
- Resolver ID
- CaltechAUTHORS:20160824-093851438
- Commonwealth of Australia
- FF0348478
- Australian Research Council
- Commonwealth Scientific and Research Organization (CSIRO)
- DP0985272
- Australian Research Council
- DP140102578
- Australian Research Council
- Curtin University
- FT120100595
- Australian Research Council
- FT110100384
- Australian Research Council
- Alexander von Humboldt Foundation
- Created
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2016-08-24Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field