Spin-up and recovery in the 1989 glitch of the Crab pulsar

Article Abstract:

The Crab pulsar rotates at a steadily decreasing rate, but in 1989 its rate of rotation suddenly increased, followed by a period of recovery. The spin-up, initial recovery and final decay are described by three exponential curves that correspond to distinct physical processes at work in the star's interior. However, a residual non-decaying increase in the rotation rate remains after the glitch. This is more likely due to radiative momentum loss or the outflow of particles than to a change in the star's shape or vortex pinning in the superfluid core.

Neutron stars, Astronomical rotation

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Birth rate of millisecond pulsars

Article Abstract:

The observation of millisecond pulsar J1012+5307 suggests both that the characteristic age calculation method using spin-down rates is invalid and that the birth rate of these pulsar is much higher than predicted. The age of the white dwarf companion to J1012+5307 was much less than the age determined for the pulsar. Additionally, the characteristics of the pulsar's system indicate a younger age which supports the theory of an initial spin period similar to the current spin rate rather than a supposed initial motion.

White dwarfs, Stellar age

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Discovery of a very bright, nearby binary millisecond pulsar

Article Abstract:

The pulsar PSR J0437-4715 was first recorded on Feb 13, 1992, and confirmed on Jul 11 as possibly the closest pulsar to the Earth during a survey for millisecond pulsars in the southern sky. A possible optical companion has been determined because of no other stars are close to the radio signal. This pulsar can be used to confirm or deny the theory that millisecond pulsars generate gamma rays and contribute to the galactic gamma ray background.

Observations, Gamma ray astronomy

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