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- W2087220134 abstract "Abstract The hydromagnetic structure of a neutron star accreting symmetrically at both magnetic poles is calculated as a function of accreted mass, M a , starting from a polytropic sphere plus central magnetic dipole ( M a =0) and evolving the configuration through a quasistatic sequence of twodimensional, Grad–Shafranov equilibria as M a increases. It is found that the accreted material spreads equatorward under its own weight, compressing the magnetic field into a thin boundary layer and burying it everywhere except in a narrow, equatorial belt. The magnetic dipole moment of the star is given by µ =5.2×10 24 ( B 0 /10 12.5 G) 1.3 ( M a /10 −8 M ʘ yr −1 ) 0.18 ( M a /M ʘ ) −1.3 Gcm 3 , and the fractional difference between its principal moments of inertia is given by Є=2.1×10 −5 ( B 0 /10 12.5 G) 0.27 ( M a /10 −8 M yr −1 ) 0.18 ( M a / M ʘ ) 1.7 , for M a in the range 10 −5 M a /M ʘ 10 −1, where B 0 is the pre-accretion magnetic field strength, and M a is the accretion rate." @default.
- W2087220134 created "2016-06-24" @default.
- W2087220134 creator A5001599778 @default.
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- W2087220134 date "2001-01-01" @default.
- W2087220134 modified "2023-10-14" @default.
- W2087220134 title "Hydromagnetic Structure of a Neutron Star Accreting at Its Polar Caps" @default.
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- W2087220134 doi "https://doi.org/10.1071/as01056" @default.
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