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Ambipolar filamentation of turbulent magnetic fields: a numerical simulation

Franqueira, M. and Tagger, M. and Gómez de Castro, Ana Inés (2000) Ambipolar filamentation of turbulent magnetic fields: a numerical simulation. Astronomy & Astrophysics, 357 (3). pp. 1143-1150. ISSN 0004-6361

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Abstract

We present the results of a 2-D, two fluid (ions and neutrals) simulation of the ambipolar filamentation process, in which a magnetized, weakly ionized plasma is stirred by turbulence in the ambipolar frequency range. The higher turbulent velocity of the neutrals in the most ionized regions gives rise to a non-linear force driving them out of these regions, so that the initial ionization inhomogeneities are strongly amplified. This effect, the ambipolar filamentation, causes the ions and the magnetic flux to condense and separate from the neutrals, resulting in a filamentary structure.

Item Type:Article
Uncontrolled Keywords:Damped alfven waves; molecular clouds; star formation; magnetohydrodynamics; spicules; drivers; Magnetohydrodynamics (MHD); turbulence; methods : numerical; Sun : magnetic fields; ISM : magnetic fields
Subjects:Sciences > Mathematics > Astronomy
ID Code:16439
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