GLEAM-X J162759.5−523504.3 as a white dwarf pulsar

The low frequency radio source GLEAM-X J162759.5−523504.3 emits pulsed coherent polarized emission like that of pulsars. Yet its period 18.18 min (1091 s) is hundreds times longer than those confirmed pulsars, and if it a neutron star mean radiated power exceeds the upper limit on spin-down by more an order magnitude. This may be explained white dwarf pulsar, with moment inertia several orders magnitude greater stars. Lorentz factor emitting charge bunches bounded from below widths temporal substructure their radiation. If curvature radiation, radius estimated frequencies emission; consistent dwarf’s inner magnetosphere but not star’s.