Hurst parameter analysis of radio pulsar timing noise

Autor:	Na, X. S., Wang, N., Yuan, J. P., Liu, Z. Y., Pan, J., Xu, R. X.
Rok vydání:	2009
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Solar and Stellar Astrophysics
Druh dokumentu:	Working Paper
Popis:	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. Comment: 7 pages, 3 figures, 2 tables, Submitted to MNRAS
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0910.1453 Zobrazit plný text záznamu View this record from Arxiv