The equilibrium of coronal flux tubes under toroidal forces (Q1190594)

In this paper we use a different approach considering the coronal loop as a part of a circular torus and studying the position of its top when the loop is in equilibrium under toroidal forces. Toroidal forces were considered by \textit{V. D. Shafranov} [Rev. Plasma Phys. 2, 103 ff. (1966)] for toroidal pinches and the equilibrium can be studied for different values of the toroidal current intensity and external magnetic field. The results show that it is possible to have a coronal flux tube in equilibrium without considering gravity and external magnetic field. Furthermore, the total twist of the flux tube and its variation with the toroidal intensity have been studied.