Periodicities in Rotation and Pulse Shape in PSR B1828–11

Periodicities in Rotation and Pulse Shape in PSR B1828–11

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 relat...

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Veröffentlicht in:International Astronomical Union Colloquium 2000, Vol.177, p.93-98
Hauptverfasser: Lyne, A. G., Stairs, I. H., Shemar, S. L.
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0252-9211
DOI:10.1017/S0252921100059133