EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 471/2 Article
Free access article

Issue A&A
Volume 471, Number 2, August IV 2007
Page(s) 409 - 417
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361:20077109



A&A 471, 409-417 (2007)
DOI: 10.1051/0004-6361:20077109

Excitation of MHD waves in magnetized anisotropic cosmologies

A. Kuiroukidis1, 2, K. Kleidis1, 3, D. B. Papadopoulos1, and L. Vlahos1

1  Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
    e-mail: kleidis@astro.auth.gr
2  Department of Informatics, Technological Education Institute of Serres, 64124 Serres, Greece
3  Department of Civil Engineering, Technological Education Institute of Serres, 64124 Serres, Greece

(Received 16 January 2007 / Accepted 16 April 2007 )

Abstract
The excitation of cosmological perturbations in an anisotropic cosmological model and in the presence of a homogeneous magnetic field was studied, using the resistive magnetohydrodynamic (MHD) equations. We have shown that fast-magnetosonic modes, propagating normal to the magnetic field, grow exponentially and saturate at high values, due to the resistivity. We also demonstrate that Jeans-like instabilities can be enhanced inside a resistive fluid and that the formation of condensations influence the growing magnetosonic waves.


Key words: magnetic fields -- magnetohydrodynamics (MHD) -- instabilities -- waves -- cosmology: early Universe -- relativity



© ESO 2007


What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.