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Periodicities in Rotation and Pulse Shape in PSR B1828–11

Published online by Cambridge University Press:  12 April 2016

A. G. Lyne ,
I. H. Stairs  and
S. L. Shemar
A. G. Lyne
Affiliation:
University of Manchester, Jodrell Bank Observatory, Macclesfield, SK11 9DL, UK
I. H. Stairs
Affiliation:
University of Manchester, Jodrell Bank Observatory, Macclesfield, SK11 9DL, UK
S. L. Shemar
Affiliation:
University of Manchester, Jodrell Bank Observatory, Macclesfield, SK11 9DL, UK

Abstract

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We report on the observation of highly-periodic, correlated variations in the rotation and pulse shape of PSR B1828–11. Three harmonically-related periodicities of 100, 500 and 250 days are seen in both the rotation rate and profile shape. The 0.7% modulation in period derivative is apparently related to oscillatory changes in the magnetospheric configuration. The origin of the periodic effects most likely lies in the free precession of the neutron star.

Type
Part 2. Timing, General Relativity and Astrometry
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 93 - 98
Copyright
Copyright © Astronomical Society of the Pacific 2000

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