Corrugation Instability of a Coronal Arcade
نویسندگان
چکیده
منابع مشابه
Fast MHD waves in a solar coronal arcade
Aims. To investigate detailed properties of fast MHD modes of a three-dimensional waveguide for a cylindrical magnetic arcade. Methods. To derive governing equations and dispersion relations for different density profiles and to numerically solve them to obtain discrete eigenvalues for fast modes and the corresponding eigenfunctions. Results. We find that small changes in the density structure ...
متن کاملIntrinsic Instability of Coronal Streamers
Plasma blobs are observed to be weak density enhancements as radially-stretched structures emerging from the cusps of quiescent coronal streamers. In this paper, it is suggested that the formation of blobs is a consequence of an intrinsic instability of coronal streamers occurring at a very localized region around the cusp. The evolutionary process of the instability, as revealed in our calcula...
متن کاملNumerical simulations of impulsively generated MHD waves in a potential coronal arcade
Impulsively generated waves in coronal arcades are simulated numerically by an application of nonlinear ideal magnetohydrodynamic (MHD) equations. The simulations are performed in the (x, z)-plane on a non-uniform Cartesian mesh. In this geometry the magnetic field can be expressed in terms of the vector potential. The governing equations, which are applied in the limit of low plasma-β, are sol...
متن کاملNumerical simulations of kink instability in line-tied coronal Loops
The results from numerical simulations carried out using a new shock-capturing, Lagrangian-remap, 3D MHD code, Lare3d are presented. We study the evolution of the m = 1 kink mode instability in a photospherically line-tied coronal loop that has no net axial current. During the non-linear evolution of the kink instability, large current concentrations develop in the neighbourhood of the infinite...
متن کاملCorrugation of Roads
We present a one dimensional model for the development of cor-rugations in roads subjected to compressive forces from a flux of cars. The cars are modeled as damped harmonic oscillators translating with constant horizontal velocity across the surface, and the road surface is subject to diffusive relaxation. We derive dimensionless coupled equations of motion for the positions of the cars and th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Solar Physics
سال: 2017
ISSN: 0038-0938,1573-093X
DOI: 10.1007/s11207-017-1209-x