Open AccessHurst parameter analysis of radio pulsar timing residuals
Author(s) -
Na X. S.,
Wang N.,
Yuan J. P.,
Liu Z. Y.,
Esamdin A.,
Pan J.,
Xu R. X.
Publication year - 2011
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2010.18104.x
Subject(s) - hurst exponent , pulsar , physics , residual , rescaled range , radio telescope , astrophysics , series (stratigraphy) , noise (video) , observatory , white noise , static timing analysis , detrended fluctuation analysis , astronomy , statistics , algorithm , mathematics , geometry , paleontology , artificial intelligence , scaling , computer science , image (mathematics) , biology , embedded system
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.