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Numerical Models of Galactic Dynamos

Published online by Cambridge University Press:  30 March 2016

Detlef Elstner
Detlef Elstner*
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

Abstract

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The state of the art for dynamo models in spiral galaxies is reviewed. The comparison of numerical models with special properties of observed magnetic fields yields constraints for the turbulent diffusivity and the α-effect. The derivation of the turbulence parameters from the vertical structure of the interstellar medium gives quite reasonable values for modelling the regular magnetic fields in galaxies with an α2Ω-dynamo. Considering the differences of the turbulence between spiral arms and interarm regions, the observed interarm magnetic fields are recovered in the numerical models due to the special properties of the α2Ω-dynamo.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 12: Highlights of Astronomy. As presented at the XXIVth General Assembly of the IAU, 2000 , 2002 , pp. 729 - 730
Copyright
Copyright © Astronomical Society of Pacific 2002

References

Brandenburg, A., Donner, K.J., Moss, D., Shukurov, A., Sokoloff, D.D. & Tuominen, I. 1993, A&A, 273, 36 Google Scholar
Deinzer, W., Grosser, H. & Schmitt, D. 1990, A&A, 273, 405 Google Scholar
Donner, K.J. & Brandenburg, A. 1990, A&A, 240, 289 Google Scholar
Elstner, D., Meinel, R. & Rüdiger, G. 1990, GApFD, 50, 85 Google Scholar
Elstner, D., Meinel, R. & Beck, R. 1992, A&AS, 94, 587 Google Scholar
Elstner, D., Golla, G., Rüdiger, G. & Wielebinski, R. 1995, A&A, , 297, 77 Google Scholar
Elstner, D., Rüdiger, G. & Schultz, M. 1996, A&A, 306, 740 Google Scholar
Elstner, D., Otmianowska-Mazur, K., von Linden, S. & Urbanik, M. 2000, A&A, 357, 129 Google Scholar
Moss, D., Brandenburg, A., Donner, K.J. & Thomasson, M. 1993, ApJ, 409, 179 Google Scholar
Moss, D., Rautiainen, P. & Salo, H. 1999, MNRAS, 303, 125 Google Scholar
Otmianowska-Mazur, K., von Linden, S., Lesch, H. & Skupniewicz, G. 1997, A&A, 323, 560 Google Scholar
Panesar, J.S., Moore, N. & Nelson, A.H. 1993, in IAU Symp 157, The cosmic dynamo, ed. Krause, F., Rädler, K.H. & Rüdiger, G. (Dordrecht: Kluwer), 345 Google Scholar
Rohde, R., Beck, R. & Elstner, D. 1999, A&A, 350, 423 Google Scholar
Stix, M. 1978, A&A, 68, 459 Google Scholar
White, M.P. 1978, Astronomische Nrichten, 299, 209 Google Scholar
Ziegler, U. 1996, A&A, 313, 448 Google Scholar