Are Coronal Loops Self-organized Critical Systems?

Details Are Coronal Loops Self-organized Critical Systems? Are Coronal Loops Self-organized Critical Systems?

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp14a..06l&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SP14A-06

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7509 Corona, 7524 Magnetic Fields, 7554 X Rays, Gamma Rays, And Neutrinos

Scientific paper

In Lopez-Fuentes et al. 2004 we studied a set of loops observed by GOES/SXI and found that loop evolution can be separated in three phases (rise, main and decay). We found that the time scales of all three phases are long compared to a cooling time. In this work we explore whether this evolution is consistent with the development of a self-organized critical (SOC) system. We compare the observed soft X-ray light curves with light curves predicted by a simple SOC model, and we examine how the rise and decay times are related to the properties of the system driver. The physical picture we have in mind is the shuffling of elemental flux tubes by photospheric motions, as first advocated by Parker. Work funded by NASA and ONR. Lopez Fuentes, M.C., Mandrini, C.H., & Klimchuk, J.A., 2004, American Astronomical Society Meeting Abstracts, 204, 5602L

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