From the distribution of rotation period and convection parameter of m type stars , stellar chromospheric activity of m type stars depart from the anticipation of a . dynamo theory obviously 從m型主序星的自轉周期的和恒星內(nèi)部對流區(qū)隨色指數(shù)的分布來看, m型主序星的色球活動行為與發(fā)電機理論的預期有明顯的差異。
In geophysics, dynamo theory proposes a mechanism by which a celestial body such as the Earth or a star generates a magnetic field. The theory describes the process through which a rotating, convecting, and electrically conducting fluid can maintain a magnetic field over astronomical time scales.