Dynamics of magnetized vortex tubes in the solar chromosphere

I. N. Kitiashvili, A. G. Kosovichev, N. N. Mansour, A. A. Wray

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We use three-dimensional radiative MHD simulations to investigate the formation and dynamics of small-scale (less than 0.5 Mm in diameter) vortex tubes spontaneously generated by turbulent convection in quiet-Sun regions with an initially weak (10 G) mean magnetic field. The results show that the vortex tubes penetrate into the chromosphere and substantially affect the structure and dynamics of the solar atmosphere. The vortex tubes are mostly concentrated in intergranular lanes and are characterized by strong (near sonic) downflows and swirling motions that capture and twist magnetic field lines, forming magnetic flux tubes that expand with height and attain magnetic field strengths ranging from 200 G in the chromosphere to more than 1 kG in the photosphere. We investigate in detail the physical properties of these vortex tubes, including thermodynamic properties, flow dynamics, and kinetic and current helicities, and conclude that magnetized vortex tubes provide an important path for energy and momentum transfer from the convection zone into the chromosphere.

Original languageEnglish (US)
Article numberL21
JournalAstrophysical Journal Letters
Volume751
Issue number1
DOIs
StatePublished - May 20 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: chromosphere
  • Sun: magnetic topology
  • Sun: photosphere
  • Sun: surface magnetism

Fingerprint

Dive into the research topics of 'Dynamics of magnetized vortex tubes in the solar chromosphere'. Together they form a unique fingerprint.

Cite this