Topological changes of the photospheric magnetic field inside active regions: A prelude to flares?

14Citations
Citations of this article
6Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The detection of magnetic field variations as a signature of flaring activity is one of the main goals in solar physics. Past efforts gave apparently no unambiguous observations of systematic changes. In the present study, we discuss recent results from observations that scaling laws of turbulent current helicity inside a given flaring active region change in response to large flares in that active region. Such changes can be related to the evolution of current structures by a simple geometrical argument, which has been tested using high Reynolds number direct numerical simulations of the MHD equations. Interpretation of the observed data within this picture indicates that the change in scaling behavior of the current helicity seems to be associated with a topological reorganization of the footpoint of the magnetic field loops, namely with the dissipation of small scales structures in turbulent media. © 2004 Elsevier Ltd. All rights reserved.

Author supplied keywords

Cite

CITATION STYLE

APA

Sorriso-Valvo, L., Carbone, V., Veltri, P., Abramenko, V. I., Noullez, A., Politano, H., … Yurchyshyn, V. (2004). Topological changes of the photospheric magnetic field inside active regions: A prelude to flares? In Planetary and Space Science (Vol. 52, pp. 937–943). https://doi.org/10.1016/j.pss.2004.02.006

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free