Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..617s&link_type=abstract
Astrophysical Journal, Part 1, vol. 219, Jan. 15, 1978, p. 617-628. Research supported by the Miller Institute for Basic Resear
Astronomy and Astrophysics
Astrophysics
58
Angular Momentum, Magnetic Stars, Neutron Stars, Stellar Mass Accretion, Stellar Rotation, Angular Velocity, Binary Stars, Earth Magnetosphere, Galactic Radiation, Kepler Laws, Rotating Disks, X Ray Sources
Scientific paper
Observed values for the average rate of decrease of the rotational period for seven binary X-ray sources are used to establish limits on the outer radius (Rm) of the magnetospheres of the neutron stars. In all cases this radius is found to be significantly less than the 'corotation radius,' where the Keplerian orbital angular velocity matches the stellar angular velocity. A simple but plausible model for the shape and location of Rm in disk accretion is developed to follow the matter from the disk onto the star. This model permits an estimate of the magnetic dipole moments and radiating areas of the individual neutron stars.
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