Other
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...278..326e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 278, March 1, 1984, p. 326-344. Research supported by the Alfred P. Sloan F
Other
42
Cosmic Plasma, Magnetic Field Reconnection, Neutron Stars, Plasma Diffusion, Polar Cusps, Stellar Magnetospheres, Stellar Mass Accretion, Binary Stars, Lines Of Force, Magnetic Field Reconnection, Stellar Atmospheres, Stellar Magnetic Fields, X Ray Sources
Scientific paper
A variety of entry modes were investigated to determine whether most of the accreting plasma enters the magnetosphere as a result of hydromagnetic instability or via other means. It is shown that diffusion is never important under the conditions of interest, nor is the loss-cone entry through the polar cusps when the plasma is collisionless. Although the loss-cone entry rate can be significantly increased if the plasma in the cusps cools and becomes collisional, this cannot stabilize the magnetosphere. The descent of the cusps cannot be the dominant entry process if the star has a persistent luminosity greater than about 10 to the 36th erg/s and a substantial fraction of the magnetosphere is illuminated. This, however, can be a significant entry process for much lower luminosities or strongly anisotropic illumination. The possibility that plasma entry via reconnection can stabilize the magnetosphere is also unlikely.
Elsner Ronald F.
Lamb Frederick K.
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