Abstract
view Abstract Citations (13) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Force-free Magnetic Fields: Generating Functions and Footpoint Displacements Wolfson, Richard ; Verma, Ritu Abstract This paper presents analytic and numerical calculations that explore equilibrium sequences of bipolar force-free magnetic fields in relation to displacments of their magnetic footpoints. It is shown that the appearance of magnetic islands - sometimes interpreted as marking the loss of equilibrium in models of the solar atmosphere - is likely associated only with physically unrealistic footpoint displacements such as infinite separation or 'tearing' of the model photosphere. The work suggests that the loss of equilibrium in bipolar configurations, sometimes proposed as a mechanism for eruptive solar events, probably requires either fully three-dimensional field configurations or nonzero plasma pressure. The results apply only to fields that are strictly bipolar, and do not rule out equilibrium loss in more complex structures such as quadrupolar fields. Publication: The Astrophysical Journal Pub Date: July 1991 DOI: 10.1086/170186 Bibcode: 1991ApJ...375..254W Keywords: Bipolarity; Coronal Loops; Force-Free Magnetic Fields; Magnetohydrodynamics; Photosphere; Analytic Functions; Displacement; Equilibrium; Numerical Analysis; Plasma Physics; HYDROMAGNETICS full text sources ADS |
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.