A simple analysis of period noise in binary X-ray pulsars

Details A simple analysis of period noise in binary X-ray pulsars A simple analysis of period noise in binary X-ray pulsars

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262..726d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 3, p. 726-734.

Statistics

Computation

15

Accretion Disks, Binary Stars, Pulsars, X Ray Stars, B Stars, Computational Astrophysics, Stellar Magnetic Fields, Supergiant Stars

Scientific paper

A simple method is presented for determining whether the noise in the pulse period history of X-ray pulsars can be described by a random walk process. This is accomplished by calculating the mean difference in angular velocity between different observations as a function of the time interval between these observations. The method is applied to 10 X-ray pulsars for which more than 10 period determinations are available. For Vela X-1, earlier results that the pulse period behavior is very well fitted by a random walk in period is confirmed. In GX 301-2 the pulse period behavior is also consistent with a random walk. Analysis of the pulse period history of three X-ray pulsars with a Be companion shows that a random walk is not consistent with the data.

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