Franqueira, M. and Tagger, M. and Gómez de Castro, Ana Inés (2004) The ambipolar filamentation in the warm ionized medium. Astrophysics and space science, 292 . pp. 155-160. ISSN 0004-640X
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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.
| Item Type: | Article |
|---|---|
| Additional Information: | International Workshop on Magnetic Fields and Star Formation, APR 21-25, 2003, Madrid, SPAIN |
| Uncontrolled Keywords: | Turbulent magnetic-fields; waves; magnetohydrodynamics; turbulence; ISM : magnetic fields; numerical methods |
| Subjects: | Sciences > Mathematics > Astronomy |
| ID Code: | 16039 |
| References: | Franqueira, M., Tagger, M. and G´omez de Castro, A. I.: 2000, A&A 357, 1143. Haerendel, G.: 1992, Nat. 360, 241. Haffner, L.M., Reynolds, R.J. and Tufte, S.L.: 1998, ApJ 501, L83. Kulsrud, R. and Pearce, W.: 1969, ApJ 156, 445. McIvor, I.: 1977, MNRAS 178, 85. Mestel, L. and Spitzer, L.: 1956, MNRAS 116, 503. Minter, A.H. and Spangler, S.R.: 1996, ApJ 458, 194. Minter, A.H. and Spangler, S.R.: 1997, ApJ 485, 182. Piddington, J.H.: 1956, MNRAS 116, 314. Reynolds, R.J., Haffner, L.M. Tufte, S. L.: 2000, in: J. Arthur, N. Brickhouse, and J. Franco (eds.), Astrophysical plasmas: Codes, Models and Observations, Rev. Mex. Astron. Astrof. (Serie de conferencias) Vol. 9, p. 249. Tagger, M., Falgarone, E. and Shukurov, A.: 1995, A&A 229, 940. |
| Deposited On: | 20 Jul 2012 13:38 |
| Last Modified: | 20 Jul 2012 13:38 |
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