Particle Emission-dependent Timing Noise of Pulsars?

Details Particle Emission-dependent Timing Noise of Pulsars? Particle Emission-dependent Timing Noise of Pulsars?

2010-09-17

arxiv.org/abs/1009.3330v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 2 figures. (Accepted by Chin. Phys. Lett.)

Scientific paper

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 paper. As proposed by Xu & 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 can't 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 accord with the observed timing behaviors on the timescale of years.

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