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

Abstract

view Abstract Citations (52) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Could Glitches Inducing Magnetospheric Fluctuations Produce Low-Frequency Pulsar Timing Noise? Cheng, K. S. Abstract 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). Publication: The Astrophysical Journal Pub Date: October 1987 DOI: 10.1086/165673 Bibcode: 1987ApJ...321..805C Keywords: 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; Astrophysics; PULSARS; STARS: NEUTRON full text sources ADS | data products SIMBAD (17)