Particle Emission-dependent Timing Noise of Pulsars?

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 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.

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

References in corpus (5)

• Switched magnetospheric regulation of pulsar spin-down
• A periodically active pulsar giving insight into magnetospheric physics
• An analysis of the timing irregularities for 366 pulsars
• Assessing the Role of Spin Noise in the Precision Timing of Millisecond Pulsars
• What can the braking indices tell us about pulsars' nature?

Cited by in corpus (5)

• Recent glitches detected in the Crab pulsar
• Fluctuating neutron star magnetosphere: braking indices of eight pulsars, frequency second derivatives of 222 pulsars and 15 magnetars
• Pulsar braking: magnetodipole vs. wind
• Testing Models of Magnetic Field Evolution of Neutron Stars with the Statistical Properties of Their Spin Evolutions
• Modeling the evolution and distribution of the frequency's second derivative and the braking index of pulsar spin