Physics – Plasma Physics
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dpp.f3m01c&link_type=abstract
American Physical Society, Division of Plasma Physics Meeting, November 16-20, 1998 New Orleans, LA, abstract #F3M.01
Physics
Plasma Physics
Scientific paper
Quiescent prominences are long-lived condensations suspended by magnetic fields in the solar corona. The prominence plasma is typically 2 orders of magnitude cooler and denser than the surrounding coronal plasma. These condensations are traditionally observed in H_α, seen as long dark filaments in absorption against the solar disk and as gossamer curtains in emission at the solar limb. This talk will discuss the inferred hydromagnetic structure of quiescent prominences to make the suggestion that they form in a much larger scale magnetic field containing a horizontal flux rope of helical magnetic fields. Such an interpretation naturally relates the prominence to the observed large-scale evolution of the corona and explains why prominences are found at all times in the course of an eleven-year solar cycle. Whereas prominences have previously been an object of specialized interest in solar physics, a clear role can now be seen for the prominence in the global hydromagnetic process that takes the corona from its activity minimum configuration to the one at activity maximum when the solar magnetic field reverses polarity.
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