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The timing noise of PSR 0823+26, 1706-16, 1749-28, 2021+51 and the anomalous braking indices
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Date
1999-06-11
Author
Baykal, Altan
Alpar, MA
Boynton, PE
Deeter, JE
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We have investigated the stability of the pulse frequency second derivatives (ii) of PSR 0823+26, 1706-16, 1749-28 and 2021+51 that show significant quadratic trends in their pulse-frequency histories in order to determine whether the observed second derivatives are secular or if they arise as part: of noise processes. We have used time-of-arrival (TOA) data extending to more than three decades, which are the longest time-spans ever taken into account in pulse-timing analyses. We investigated the stability of the pulse-frequency second derivative in the framework of low-resolution noise power spectra estimated from the residuals of pulse frequency and TOA data. We have found that the v; terms of these sources arise from the red torque noise in the fluctuations of pulse-frequency derivatives, which may originate from the external torques from the magnetosphere of the pulsar.
Subject Keywords
Stars : neutron
,
Pulsars : general
,
Pulsars : individual : PSR 0823+26
,
Pulsars : individual : PSR 1706-16
,
Pulsars : individual : PSR 1749-28
,
Pulsars : individual : PSR 2021+51
URI
https://hdl.handle.net/11511/47237
Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
DOI
https://doi.org/10.1046/j.1365-8711.1999.02505.x
Collections
Department of Physics, Article