Could glitches inducing magnetospheric fluctuations produce low-frequency pulsar timing noise?

Details Could glitches inducing magnetospheric fluctuations produce low-frequency pulsar timing noise? Could glitches inducing magnetospheric fluctuations produce low-frequency pulsar timing noise?

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321..805c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 321, Oct. 15, 1987, p. 805-812.

Statistics

Computation

28

Magnetospheric Instability, Neutron Stars, Pulsar Magnetospheres, Pulsars, Random Walk, Time Dependence, White Noise, Computational Astrophysics, High Frequencies, Low Frequencies, Pair Production, Perturbation Theory, Stellar Rotation

Scientific paper

The mechanism by which the fluctuations in pulsar periods, known as the timing noise, are produced was investigated in the framework of the vortex creep theory. It is argued that the two-component timing-noise power spectra of pulsars with composite spectra (namely, 'blue noise' in high frequencies and 'red noise' in low frequencies) could be caused by two related mechanisms. It is proposed that the low-frequency component could be caused by the sudden change of current braking torque, which is perturbed by the microglitches. The perturbed torque will remain unchanged until the next microglitch; hence, the step-function-like variations in torque will give rise to a random walk in the frequency derivative (or red noise in the noise power spectra of the frequency derivative).

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