Solar prominences embedded in flux ropes: morphological features and dynamics from 3D MHD simulations

J. Terradas, R. Soler, M. Luna, R. Oliver, J. L. Ballester, Andrew Nicholas Wright

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The temporal evolution of a solar prominence inserted in a three-dimensional magnetic flux rope is investigated numerically. Using the model of Titov & Démoulin under the regime of weak twist, the cold and dense prominence counteracts gravity by modifying the initially force-free magnetic configuration. In some cases a quasi-stationary situation is achieved after the relaxation phase, characterized by the excitation of standing vertical oscillations. These oscillations show a strong attenuation with time produced by the mechanism of continuum damping due to the inhomogeneous transition between the prominence and solar corona. The characteristic period of the vertical oscillations does not depend strongly on the twist of the flux rope. Nonlinearity is responsible for triggering the Kelvin-Helmholtz instability associated with the vertical oscillations and that eventually produces horizontal structures. Contrary to other configurations in which the longitudinal axis of the prominence is permeated by a perpendicular magnetic field, like in unsheared arcades, the orientation of the prominence along the flux rope axis prevents the development of Rayleigh-Taylor instabilities and therefore the appearance of vertical structuring along this axis.
Original languageEnglish
Pages (from-to)1-14
Number of pages14
JournalAstrophysical Journal
Volume820
Issue number2
DOIs
Publication statusPublished - 30 Mar 2016

Keywords

  • Magnetic fields
  • Plasmas
  • Sun: corona

Fingerprint

Dive into the research topics of 'Solar prominences embedded in flux ropes: morphological features and dynamics from 3D MHD simulations'. Together they form a unique fingerprint.

Cite this