EDP Sciences
Free access
Volume 411, Number 3, December I 2003
Page(s) 615 - 621
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20031560

A&A 411, 615-621 (2003)
DOI: 10.1051/0004-6361:20031560

Research Note

Inter-Network magnetic fields observed during the minimum of the solar cycle

J. Sánchez Almeida

Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
(Received 26 June 2003 / Accepted 29 September 2003)

We analyze a time series of high angular resolution magnetograms of quiet Sun Inter-Network (IN) magnetic fields. These magnetograms have a spatial resolution better than 0 $\farcs$5, a noise of some 20 G, and they have been obtained at the disk center during the minimum of the solar cycle. The IN regions show a typical unsigned flux density of the order of 15 G. Signals occur, preferentially, in the intergranular lanes, and the strongest signals trace a network with a scale similar to the mesogranulation. All these features are consistent with the IN magnetograms by Dominguez Cerdena et al. (2003a,b), obtained during the maximum of the solar cycle. Consequently, the unsigned magnetic flux of the structures that give rise to the IN polarization signals does not seem to undergo large variations during the solar cycle.

Key words: Sun: granulation -- Sun: magnetic fields -- Sun: photosphere

© 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.