Stellar Rotation Effects on the Stellar Wind

We discuss the role of the azimuthal stellar wind flow in the stellar-rotation breaking mechanism. We make use of Parker-Weber-Davis ([1], [2]) MHD stellar wind model. The stellar rotation is shown to cause the slow magnetosonic critical point to occur lower in the corona and hence lead to enhanced stellar wind acceleration. For strong rotators, this process is shown to occur in a narrow shell adjacent to the star. \\ \\ $[1]$ E. N. Parker: Astrophys. J. 128, 664, (1958). \\ \\ $[2]$ E. J. Weber and L. Davis: Astrophys. J. 148, 217, (1967).