An analytical MHD wind model with latitudinal dependences obtained using separation of the variables

JJG Lima, Eric Ronald Priest, K Tsinganos

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

A new class of analytical 2-D solutions of the full set of the steady magnetohydrodynamic (MHD) equations, describing an axisymmetric helicoidal magnetized out ow originating from a rotating central object, is presented. The solutions are systematically obtained via a nonlinear separation of the variables in the momentum equation. The analysis yields three parameters which measure the anisotropy in the latitudinal distribution of various ow quantities. Topologically, the wind speed is controlled by an X-type critical point that acts to filter out a single wind-type branch and the Alfven singularity. The solutions can be regarded as an extension outside the equatorial plane of the Weber & Davis (1967) model of magnetized winds but with a variable polytropic index.

Original languageEnglish
Pages (from-to)240-249
Number of pages10
JournalAstronomy & Astrophysics
Volume371
Publication statusPublished - May 2001

Keywords

  • magnetohydrodynamics (MHD)
  • plasmas
  • Sun : magnetic fields
  • solar wind
  • stars : winds, outflows
  • ISM : jets and outflows
  • STEADY HYDROMAGNETIC FLOWS
  • OPEN MAGNETIC-FIELDS
  • NONPOLYTROPIC ASTROPHYSICAL OUTFLOWS
  • STELLAR WINDS
  • SOLAR-WIND
  • COLLIMATED WINDS
  • NUMERICAL SIMULATIONS
  • JETS
  • CORONA
  • ATMOSPHERE

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