Journal Article

Hurst parameter analysis of radio pulsar timing residuals

X. S. Na, N. Wang, J. P. Yuan, Z. Y. Liu, A. Esamdin, J. Pan and R. X. Xu

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 412, issue 4, pages 2678-2684
Published in print April 2011 | ISSN: 0035-8711
Published online April 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.18104.x
Hurst parameter analysis of radio pulsar timing residuals

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We analyse the timing residuals for 50 pulsars observed using the Nanshan 25-m radio telescope at Urumqi Observatory by determining the Hurst parameter for each data set using the rescaled range method. These pulsars have been observed over a time span of 5–8 yr and have been selected to have timing residuals that resemble white noise rather than smooth curves. The results are compared with those for shuffled residual series. Despite the noise-like appearance, some timing residual series showed Hurst parameters that deviated significantly from the shuffled series. We conclude that Hurst parameter analysis is capable of detecting long-term memory in timing residuals.

Keywords: methods: statistical; pulsars: general

Journal Article.  4128 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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