Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2009-10-08
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
7 pages, 3 figures, 2 tables, Submitted to MNRAS
Scientific paper
We present an analysis of timing residual (noise) of 54 pulsars obtained from 25-m radio telescope at Urumqi Observatory with a time span of 5~8 years, dealing with statistics of the Hurst parameter. The majority of these pulsars were selected to have timing noise that look like white noise rather than smooth curves. The results are compared with artificial series of different constant pairwise covariances. Despite the noise like appearance, many timing residual series showed Hurst parameters significantly deviated from that of independent series. We concluded that Hurst parameter may be capable of detecting dependence in timing residual and of distinguishing chaotic behavior from random processes.
Liu Zheng-You
Na X. S.
Pan Jicai
Wang Ning
Xu Ren Xin
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