Parker Spirals
If the sun didn’t rotate, then the frozen-in magnetic field would be carried out radially with the solar wind (v = 440 km/s on average). Instead, the sun’s rotation (ω = 2.87 x 10-6 rad/s) drags the magnetic field configuration into a Parker Spiral. The angle between the radial flow and the spiral can be found with simple trigonometry. where the radial component of the magnetic field at some distance from the sun’s center can be found through the conservation…