The Ambipolar Filamentation in the Warm Ionized Medium |
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Authors: | M Franqueira M Tagger AI Gómez de Castro |
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Institution: | 1. Sec. Dept. Astronomía y Geodesia, Fac. CC. Matemáticas, Universidad Complutense de Madrid, Spain 2. Service d'Astrophysique, DSM/DAPNIA, C.E.A, Saclay
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Abstract: | We present the 2-D, two fluid (ions + neutrals) numerical simulations that we are carrying out in order to study the ambipolar filamentation process, in which a magnetized, partially 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, and causes the ions and the magnetic flux to condense in the most ionized regions, resulting in a filamentary structure where initial ionization inhomogeneities are amplified. This mechanism might help to explain some features observed in magnetized and partially ionized astrophysical plasmas as the interstellar medium. |
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