Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-24T17:07:29.150Z Has data issue: false hasContentIssue false
  • English
  • Français

Magnetic field topology from non-force free extrapolation and magnetohydrodynamic simulation of its eventual dynamics

Published online by Cambridge University Press:  27 November 2018

Sushree S. Nayak ,
R. Bhattacharyya ,
A. Prasad Open the ORCID record for A. Prasad [Opens in a new window]  and
Q. Hu
Sushree S. Nayak
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Bari Road, Udaipur-313001, India emails: [email protected], [email protected], [email protected]
R. Bhattacharyya
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Bari Road, Udaipur-313001, India emails: [email protected], [email protected], [email protected]
A. Prasad
Affiliation:
Udaipur Solar Observatory, Physical Research Laboratory, Dewali, Bari Road, Udaipur-313001, India emails: [email protected], [email protected], [email protected]
Q. Hu
Affiliation:
Center for Space Plasma and Aeronomic Research, The University of Alabama in Huntsville, Huntsville, AL 35899, USA email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Magnetic reconnections (MRs) for various magnetic field line (MFL) topologies are believed to be the initiators of solar eruptive events like flares and coronal mass ejections (CMEs). Consequently, important is a thorough understanding and quantification of the MFL topology and their evolution which leads to MRs. Contemporary standard is to extrapolate the coronal MFLs using equilibrium models where the Lorentz force on the coronal plasma is zero everywhere. In tandem, a non-force-free-field (NFFF) extrapolation scheme has evolved and allows for a Lorentz force which is non-zero only at the photosphere but asymptotically vanishes with height. The paper reports magnetohydrodynamic (MHD)- simulations initiated by NFFF extrapolation of the coronal MFLs for a flare producing active region NOAA 11158. Interestingly, quasi-separatrix layers (QSLs) which facilitate MRs are detected in the extrapolated MFLs and, here the paper makes an attempt to asses the role of QSLs in the flare onsets.

Keywords

Sunsolar flaresmagnetic reconnectionMHD-simulation.
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 183 - 184
Copyright
Copyright © International Astronomical Union 2018 

References

Bhattacharyya, R. & Janaki, M. S., 2004, Physics of Plasmas, 11, 5615Google Scholar
Hu, Q., Dasgupta, B., Choudhary, D. P., & Büchner, J., 2008, ApJ, 679, 848–853Google Scholar
Démoulin, P., 2006, Advances in Space Research, 37, 1269Google Scholar
Smolarkiewicz, P. K. & Charbonneau, P., 2013, Journal of Computational Physics, 236, 608Google Scholar