See also: Pulsar (homonymy)

A pulsar millisecond , sometimes named pulsar recycled , is a Pulsar of which the period of rotation is about one to ten Milliseconde S.

Origin

The origin of the pulsars milliseconds is not known with certainty. The most common theory supports that they begin their existence like pulsars from longer period and are gradually accelerated (or “recycled”) by Accrétion.

Certain pulsars emitting of the x-rays would be in the course of accretion and of acceleration. It is possible that it are about neutron stars accelerated by transfer of Angular momentum of a star companion which exceeded its Lobe of Rock. The pulsars milliseconds emit in longer wavelengths.

The current theories on the structure and the evolution of neutron stars predict impossibility for a pulsar of having one period of rotation lower than the millisecond. At this speed, the radiation of gravitational waves would slow down rotation.

Observations

At present, approximately 150 pulsars milliseconds were discovered. The first, PSR B1937+21, was discovered in 1982; rotating 641 times in one second, it held the speed records during 23 years, before the discovery of PSR J1748-2446ad: this pulsar carrying out 716 rotations in one second is the pulsar the fastest millisecond known. The majority of the pulsars milliseconds turn approximately to 300 rotations a second.

Many pulsars milliseconds were discovered in globular Amas S, where the very strong stellar density allows the interactions and the transfers of matter necessary to their accelerations. Currently, approximately 80 pulsars milliseconds were discovered in globular clusters, certain clusters which can contain some up to 20.

The pulsar IGR J00291+5934, radiant in x-rays, is regarded as a good candidate with the detection of gravitational waves and the possible measurement of the braking of rotation.

See too

Internal bonds

• Pulsar

External bonds

• '' How Millisecond Pulsars Spin So Fast '' ( Universe Today )
• '' Fast-spinning star could test gravitational waves '' ( New Scientist )

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