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Theoretical analysis reveals that Cartan torsion effects on neutron star surfaces are orders of magnitude smaller than magnetic forces, indicating they are unobservable.
The relative size of the surface deformations of a neutron star due to (1) rotation, (2) magnetic dipole force, and (3) the gravitational force due to intrinsic spin (Cartan torsion) are estimated. The size of the torsion effect is found to be many orders of magnitude less than the magnetic dipole interactions, and hence unobservable for neutron stars. Subject headings: magnetic stars - neutron stars - relativity - rotation, stellar
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David G. Kerlick (1973) studied this question.
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