Re-examination of the thermal history of Mercury and the origin of its intrinsic magnetic field

根据太阳星云演化模型估算的水星体积组成，被用于对这颗最内层行星的热历史和发电机作用进行数值和理论分析。地幔组分的粘性可能比之前的估计更大，这减缓了固体内核的生长。缓慢生长的内核释放出轻元素，可能引起外液核对流，产生适度的发电机作用和弱的本征磁场。这些结果为解释目前和未来的水星探测飞行任务所获得的数据提供了基础。

The bulk composition of Mercury estimated from a model for the solar nebula evolution is adopted for the numerical and theoretical analysis of the thermal history and dynamo action of this innermost planet. The mantle components are probably more viscous than the previous estimates, which slows down the growth of solid inner core. The release of light element from the slowly growing inner core possibly induces the convection of outer liquid core with generating a moderate dynamo action and the present weak intrinsic magnetic field. These results provide a basis for the interpretation of data acquired by the current and future Mercury exploration missions.