Other
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.251..555m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 251, Aug. 15, 1991, p. 555-563. Research supported by R
Other
16
Accretion Disks, Magnetic Stars, Neutron Stars, Stellar Rotation, Flywheels, Stellar Mass Accretion, X Ray Sources
Scientific paper
The behavior of a rapidly spinning, magnetized neutron star embedded in plasma accreting spherically at a supercritical rate is investigated. Friction between the magnetosphere and the surrounding plasma is a source of power. In addition, when the magnetic field is asymmetric with respect to the rotation axis of the star, the rotating magnetosphere acts as a propeller, transfering kinetic energy to the material outside the magnetosphere. These processes are qualified and the values of the Alfven radius and of the density of the surrounding plasma are calculated. It is found that, if the neutron star rotates rapidly and has a strong magnetic field, such objects manifest themselves as nonthermal X-ray sources. Otherwise, the material outside the magnetosphere shrouds them in such high optical depth that any outgoing radiation is thermalized. Some observational implications are briefly discussed.
Fabian Andrea C.
Mineshige Shin
Rees Martin J.
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