On the Effects of Spin Properties on Timing Noise Parameters of Rotation-Powered Pulsars
International Journal of Astrophysics and Space Science
Volume 6, Issue 6, December 2018, Pages: 101-107
Received: Nov. 3, 2018; Accepted: Nov. 22, 2018; Published: Jan. 13, 2019
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Evaristus Uzochukwu Iyida, Department of Physics and Astronomy, Faculty of Physical Sciences, University of Nigeria, Nsukka, Nigeria
Christian Ikechukwu Eze, Department of Physics and Astronomy, Faculty of Physical Sciences, University of Nigeria, Nsukka, Nigeria
Innocent Okwudili Eya, Department of Science Laboratory Technology, Faculty of Physical sciences, University of Nigeria, Nsukka, Nigeria
Augustine Ejikeme Chukwude, Department of Physics and Astronomy, Faculty of Physical Sciences, University of Nigeria, Nsukka, Nigeria
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Detailed investigation of improved timing observations has shown that the spin properties of a large population of rotation-powered pulsars on a varied range of timescales are strongly dominated by random fluctuations. Even though, there is no widely accepted way to characterize timing noise in these pulsars mainly due to the enormous complexity in their structure and true dynamical behavior, the measurements of these pulsar spin properties are essential for extracting important information about their spin down evolution. In this paper, a statistical analysis of a large sample of Jodrell Bank Observatory (JBO) radio pulsars with improved and published data on stability parameters (∆8) and other quantities that are used to parameterize pulsar rotational fluctuations on observation timescales [timing noise activity parameter A, timing noise statistic (σ23) and pulsar clock stability parameter σZ (T)] was compiled for an in-depth characterization of the spin-down evolution of rotation-powered pulsars. The existence of any relationship will go a long way in helping us probe the properties and dynamics of a neutron star. The results of our analysis reveal that radio pulsar spin-down parameters are reasonably coupled to timing noise activity. A simple regression analysis of our data show that timing irregularities in pulsar is more than 75% correlated with the magnitude of pulsar spin-down variables. The implications of the result of the improved measurements of the key parameters characterizing the spin-down of pulsars on long timescales are discussed.
Methods: Statistical, Stars: Neutron, Pulsars: General
To cite this article
Evaristus Uzochukwu Iyida, Christian Ikechukwu Eze, Innocent Okwudili Eya, Augustine Ejikeme Chukwude, On the Effects of Spin Properties on Timing Noise Parameters of Rotation-Powered Pulsars, International Journal of Astrophysics and Space Science. Vol. 6, No. 6, 2018, pp. 101-107. doi: 10.11648/j.ijass.20180606.12
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