Besides raw material availability, what external factor might influence the efficiency of heavy metal condensation into a core?

Answer

The magnetic field generated by the parent star

It has been suggested that the physical environment during the protoplanetary disk stage, such as the magnetic field generated by the parent star, could affect how efficiently heavy metals condense and settle into a core structure.

Besides raw material availability, what external factor might influence the efficiency of heavy metal condensation into a core?
astronomyplanetsPlanetary Scienceironcores