Three-dimensional Propagation of Magnetohydrodynamic Waves in Solar Coronal Arcades

  title={Three-dimensional Propagation of Magnetohydrodynamic Waves in Solar Coronal Arcades},
  author={S. Rial and I. Arregui and Jaume Terradas and Ram{\'o}n Oliver and Jos{\'e} Luis Ballester},
  journal={The Astrophysical Journal},
We numerically investigate the excitation and temporal evolution of oscillations in a two-dimensional coronal arcade by including the three-dimensional propagation of perturbations. The time evolution of impulsively generated perturbations is studied by solving the linear, ideal magnetohydrodynamic (MHD) equations in the zero-β approximation. As we neglect gas pressure, the slow mode is absent and therefore only coupled fast MHD and Alfven modes remain. Two types of numerical experiments are… Expand
Wave Leakage and Resonant Absorption in a Loop Embedded in a Coronal Arcade
We investigate the temporal evolution of impulsively generated perturbations in a potential coronal arcade with an embedded loop. For the initial configuration we consider a coronal loop, representedExpand
Numerical simulations of impulsively generated Alfv\'en waves in solar magnetic arcades
We perform numerical simulations of impulsively generated Alfv\'en waves in an isolated solar arcade, which is gravitationally stratified and magnetically confined. We study numerically theExpand
Apparent cross-field superslow propagation of magnetohydrodynamic waves in solar plasmas
In this paper we show that the phase mixing of continuum Alfv\'{e}n waves and/or continuum slow waves in magnetic structures of the solar atmosphere as, e.g., coronal arcades, can create the illusionExpand
Coronal Heating by MHD Waves
The heating of the solar chromosphere and corona to the observed high temperatures, imply the presence of ongoing heating that balances the strong radiative and thermal conduction losses expected inExpand
On Excited Frequencies for Alfvén Waves in a Coronal Arcade
The normal modes of oscillation for a magnetic arcade are used to analytically solve an initial value problem and estimate the power spectra of wave frequencies generated by a reconnection event inExpand
Temporal evolution of MHD waves in solar coronal arcades
espanolEn esta tesis estudiaremos las oscilaciones verticales de una arcada potencial en la aproximacion beta=0 de un plasma, cuando diferentes perfiles de densidad son considerados. Por un lado nosExpand
A Novel Approach to Resonant Absorption of the Fast MHD Eigenmodes of a Coronal Arcade
The arched eld lines forming coronal arcades are often observed to undulate as magne- tohydrodynamic (MHD) waves propagate both across and along the magnetic eld. These waves are most likely aExpand


Magnetohydrodynamic waves in a sheared potential coronal arcade
We study the effects of magnetic field shear (B y ¬= 0) and longitudinal propagation of perturbations (k y ¬= 0) on the linear and adiabatic magnetohydrodynamic (MHD) normal modes of oscillation of aExpand
On the Properties of Low-β Magnetohydrodynamic Waves in Curved Coronal Fields
The solar corona is a complex magnetic environment where several kinds of waves can propagate. In this work, the properties of fast, Alfven, and slow magnetohydrodynamic waves in a simple curvedExpand
Magnetohydrodynamic Waves in Sheared Coronal Arcades
The magnetohydrodynamic (MHD) normal modes of oscillation of sheared coronal arcades including longitudinal wave propagation are studied. Solutions have been computed to ascertain the effects of theExpand
Transverse oscillations in solar coronal loops induced by propagating Alfvénic pulses
The propagation and the evolution of Alfvenic pulses in the solar coronal arcades is investigated by means of MHD numerical simulations. Significant transverse oscillations in coronal loops,Expand
Numerical simulations of impulsively generated vertical oscillations in a solar coronal arcade loop
Aims. The main aims of the paper are to carry out numerical simulations of the vertical oscillations in a coronal loop in order to determine their dependence on various parameters and to compare themExpand
The solar corona is structured by the magnetic field, which has the shape of loops and arcades. These structures remain stable from days to weeks, and there is some evidence, such as sporadic orExpand
Fast magnetoacoustic waves in curved coronal loops - II. Tunneling modes
Aims. Fast magnetoacoustic waves in curved coronal loops are investigated and the role of lateral leakage in wave damping, which includes the mechanism of wave tunneling, is explored. Methods. AExpand
Fast magnetoacoustic waves in curved coronal loops. I. Trapped and leaky modes
A study of vertically polarised fast magnetoacoustic waves in a curved coronal loop is presented. The loop is modeled as a semi-circular magnetic slab in the zero plasma-β limit. The governingExpand
Coupling of Fast and Alfvén modes in realistic magnetospheric geometries
In this paper we extend the analysis presented by Wright (1992) to describe not only the growth of resonant Alfvn waves but also the damping of the fast cavity mode which loses energy to the AlfvinExpand
Seismology of curved coronal loops with vertically polarised transverse oscillations
Aims. Using a model of vertically polarised fast magnetoacoustic waves in curved coronal loops, the method of coronal seismology is applied to observations of transverse loop oscillations. Methods.Expand