It is also unclear whether it is possible to generate such large dipole fields using this explanation, due to the slow rotation of the star.
12.
One characteristic of a dipole field is that the strength of the field falls off inversely with the cube of the distance from the magnet's center.
13.
At large distances, however, the magnetic fields of currents flowing in opposite directions cancel out and only a net dipole field survives, slowly diminishing with distance.
14.
In the ( approximately ) dipole field of the Earth, the magnitude of the field is greatest near the magnetic poles, and least near the magnetic Equator.
15.
Recent computer simulations also indicate that the planet's peripheral magnetic fields, which constitute only 10 percent of the total, may get stronger as the dominant dipole field weakens.
16.
In order to maintain the magnetic field against ohmic decay ( which would occur for the dipole field in 20, 000 years ), the outer core must be convecting.
17.
A centered dipole field is not able to reproduce the observations, but an off-center dipole 664 MG at the south pole and 197 MG at the north pole does.
18.
Hale suggested that the sunspot cycle period is 22 years, covering two periods of increased and decreased sunspot numbers, accompanied by polar reversals of the solar magnetic dipole field.
19.
In general, the inferred equivalent internal dipole field is smaller when estimated on the basis of magnetospheric size and shape ( ~ 150 200 nT " R " 3 ).
20.
A more complex model of the point charge array introduces an effective medium by averaging the microscopic charges; for example, the averaging can arrange that only dipole fields play a role.
