Image Details
Caption: Figure 1.
Evolution of the planetary magnetic field and FAP fraction (Equation (2)) for Earth orbiting the Sun at 1 au, given differences in initial abundances of radioisotopes (40K in the core and mantle; 232Th, 235U, and 238U in the mantle only). The stellar magnetic field was held constant at B* = 5 Gauss.
© 2026. The Author(s). Published by the American Astronomical Society.