EDP Sciences Journals List
Advanced Search
Subscriber Authentication Point
Home All issues Volume 398/ 3 Article

Free access article

Issue A&A
Volume 398, Number 3, February II 2003
Page(s) 801 - 807
Section Cosmology
DOI http://dx.doi.org/10.1051/0004-6361:20021691



A&A 398, 801-807 (2003)
DOI: 10.1051/0004-6361:20021691

A force-free field with constant alpha in an oblate cylinder: A generalization of the Lundquist solution

M. Vandas1 and E. P. Romashets2

1  Astronomical Institute, Academy of Sciences, Bocní II 1401, 141 31 Praha 4, Czech Republic
    e-mail: vandas@ig.cas.cz
2  Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moscow Region, 142190, Russia
    e-mail: romash@izmiran.rssi.ru

(Received 10 September 2002 / Accepted 30 October 2002 )

Abstract
A force-free magnetic field with constant alpha for a circular cylindrical flux rope (Lundquist solution) is widely used to describe the magnetic field configuration in interplanetary flux ropes. Observations as well as MHD simulations indicate that interplanetary flux ropes are not circular but have an oblate shape. Here we present an analytical solution for a force-free magnetic field with constant alpha in an elliptic flux rope which may be regarded as a direct generalization of the Lundquist solution. An alternative simpler solution for a force-free magnetic field with constant alpha in an oblate flux rope is discussed.


Key words: magnetic fields -- Sun: coronal mass ejections (CMEs)

Offprint request: M. Vandas, vandas@ig.cas.cz




© ESO 2003

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.