Light-cylinder dipole power estimate ($P\sim B_{\ast }^2{R}_{\ast }^6{\Omega }^4/({\mu }_0{c}^3)$)

Extrapolate an anchored magnetic dipole field to the light cylinder $R_c=c/\Omega$ and estimate outward power as magnetic energy density times $c{R}_c^2$. The result fixes the displayed scaling but not the geometric coefficient. An aligned vacuum dipole does not radiate, while a current-carrying plasma magnetosphere can have nonzero aligned spin-down. Corotation at the light cylinder is a notional limiting construction, not a material surface moving rigidly at light speed.