Evolution of helically twisted prominence structures of March 11, 1979

Details Evolution of helically twisted prominence structures of March 11, 1979 Evolution of helically twisted prominence structures of March 11, 1979

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..133..339s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 133, June 1991, p. 339-355.

Physics

10

Force-Free Magnetic Fields, Helices, Solar Atmosphere, Solar Prominences, Coronal Loops, H Alpha Line, Magnetic Field Configurations, Solar Activity Effects

Scientific paper

H-alpha line-center observations of the helically twisted structure of a flare-associated erupting prominence of March 11, 1979 are presently investigated in order to understand the role played by twisted force-free magnetic fields, assuming that the helical structures visible in H-alpha outline the field lines in which prominence tubes are embedded. Evidence is adduced for a restructuring of the magnetic field configuration over the active region during the course of prominence eruption. The temporal evolution of the force-free parameter is obtained for two main-prominence tubes intertwined in a ropelike structure.

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