A&A 475, 639-642 (2007)
A note on the cyclic evolution of the pulsar magnetosphereI. Contopoulos
Research Center for Astronomy, Academy of Athens,
11527 Athens, Greece
(Received 18 June 2007 / Accepted 10 September 2007)
Positive and negative pulsar breaking indices
suggest that some fraction of the pulsar
spindown torque undergoes a cyclic evolution.
The observed strong correlation of
"anomalous" breaking indices with pulsar age
implies that the characteristic periodicity
timescale is in the range
100 to 10 000 years depending on the
fraction of the spindown torque that undergoes
cyclic evolution, 1 to 100% respectively. We argue that the longest variability timescale is consistent with a neutron star magnetic cycle similar to the solar cycle.
stars: pulsars: general --
stars: magnetic fields
© ESO 2007
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