EGU2020-19255
https://doi.org/10.5194/egusphere-egu2020-19255
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Relation between the magnetic free energy and relative magnetic helicity in the MHD extreme state of solar corona

Shangbin Yang1, Joerg Buechner2, and Hongqi Zhang1
Shangbin Yang et al.
  • 1National Astronomical Observatories, Chinese Academy of Sciences, Key Laboratory of Solar Activity, Beijing, China (yangshb@nao.cas.cn)
  • 2Center for Astronomy and Astrophysics ,Berlin Institute of Technology

Magnetic helicity is a quantity describing the twist, writhe, and torsion of magnetic field lines and magnetic configurations . The concept of magnetic helicity has successfully been applied to characterize solar coronal processes. A conjecture about one approximation relation between free magnetic free energy and relative magnetic helicity in the MHD extreme state of solar corona has been proposed by using the concept of magnetic helicity conservation and Lie-Poisson mechanical structure of MHD. We use constant α force-free filed extrapolation to check out this relation. We also apply this relation to analyze the results from the simulations and observations. Such relation may be helpful to predict the solar activity like the solar flares and CMEs

How to cite: Yang, S., Buechner, J., and Zhang, H.: Relation between the magnetic free energy and relative magnetic helicity in the MHD extreme state of solar corona, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-19255, https://doi.org/10.5194/egusphere-egu2020-19255, 2020