| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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Particle Emission-Dependent Timing Noise of Pulsars |
| LIU Xiong-Wei**, NA Xue-Sen, XU Ren-Xin, QIAO Guo-Jun
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School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871
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| Cite this article: |
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LIU Xiong-Wei, NA Xue-Sen, XU Ren-Xin et al 2011 Chin. Phys. Lett. 28 019701 |
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Abstract Though pulsars spin regularly, the differences between the observed and predicted ToA (time of arrival), known as "timing noise", can still reach a few milliseconds or more. We try to understand the noise in this study. As proposed by Xu and Qiao in 2001, both dipole radiation and particle emission would result in pulsar braking. Accordingly, possible fluctuation of particle current flow is suggested here to contribute significant ToA variation of pulsars. We find that the particle emission fluctuation could lead to timing noise which cannot be eliminated in timing process and that a longer period fluctuation would arouse a stronger noise. The simulated timing noise profile and amplitude are in agreement with the observed timing behaviors on the timescale of years.
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| Keywords:
97.60.Gb
05.40.Ca
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Received: 17 September 2010
Published: 23 December 2010
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