Spin and Magnetic Evolution of Millisecond Pulsars in X-Ray Binaries

Details Spin and Magnetic Evolution of Millisecond Pulsars in X-Ray Binaries Spin and Magnetic Evolution of Millisecond Pulsars in X-Ray Binaries

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20920801c&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #208.01; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

Accretion-powered and nuclear-powered millisecond pulsars are old neutron stars which have been spun up to rapid rotation by magnetic accretion torque. They are among the most rapidly rotating stars known, with surface velocities of order 0.1c. However, the spin frequency distribution of these systems, as observed by the Rossi X-Ray Timing Explorer (RXTE), cuts off sharply above 700 Hz, well below the presumed centrifugal break-up limit. The radio millisecond pulsar population appears to exhibit a similar cutoff. A variety of braking mechanisms might contribute to this cutoff, including magnetic accretion torques, magnetic dipole radiation, and gravitational radiation from the rapidly rotating neutron star. I will briefly describe the ongoing effort to understand the millisecond pulsar spin distribution.

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