Pre-main sequence evolutionary tracks

Magnetic fields are at the heart of the observed stellar activity in late-type stars, and they are presumably generated by a dynamo mechanism at the interface layer (tachocline)...

磁场是晚型星（late-type stars）中观测到的恒星活动的核心所在，据信这类磁场由界面层处的发电机机制（dynamo mechanism）产生，该界面层即差旋层（tachocline）……