مشخصات پژوهش

عنوان	The effect of twisted magnetic field on the phase mixing of the kink magnetohydrodynamic waves in coronal loops
نوع پژوهش	مقاله ارائه شده کنفرانسی
کلیدواژه‌ها	corona, magnetic fields, oscillations
چکیده	There are observational evidences for the existence of twisted magnetic field in the solar corona. This inspires us to investigate the effect of a twisted magnetic field on the evolution of magnetohydrodynamic (MHD) kink waves in coronal loops. To this aim, we solve the incompressible linearized MHD equations in a magnetically twisted non-uniform coronal flux tube in the limit of long wavelengths. Our results show that a twisted magnetic field can enhance or diminish the rate of phase-mixing of the Alfven continuum modes and the decay rate of the global kink oscillation. Also our results confirm that in the presence of a twisted magnetic field, the quasi-mode frequency of the kink waves is asymmetric with respect to the propagation direction. Even a small amount of twist can have an important impact on the process of energy cascade to small scales.
پژوهشگران	کیومرث کرمی (نفر دوم)، زانیار ابراهیمی (نفر اول)، رابرتو سولر (نفر سوم)