Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...200..281g&link_type=abstract
Astrophysical Journal, vol. 200, Sept. 1, 1975, pt. 1, p. 281-297.
Astronomy and Astrophysics
Astrophysics
31
Neutron Stars, Pulsars, Spin Reduction, Stellar Rotation, Superfluidity, Crab Nebula, Magnetohydrodynamic Stability, Time Dependence, Turbulence Effects
Scientific paper
The steady-state hydrodynamic response of a neutron star's superfluid interior to the decelerating torque responsible for pulsar slow-down is analyzed. General theoretical ideas are reviewed, including the two-component theory of neutron stars, hydrodynamic instabilities and period jumps in pulsars, and superfluid turbulence. In the analysis, the neutron superfluid is treated as a barotropic inviscid compressible fluid subjected to a time-dependent azimuthally symmetric body force. The results indicate that at relatively high temperatures (such as expected in the Crab pulsar), the superfluid should rotate everywhere as a rigid body at essentially the same rate as the crust. However, the interiors of all but the lightest long-period pulsars should undergo differential rotation at a rate significantly faster than that of their crusts. Pulsar temperatures are estimated on the basis of frictional heating, and possibilities are considered for optical detection of long-period pulsars.
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