Mathematics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.348..205k&link_type=abstract
In ESA, Proceedings of the First SOHO Workshop: Coronal Streamers, Coronal Loops, and Coronal and Solar Wind Composition p 205-2
Mathematics
2
Coronal Loops, Density Distribution, Hydrodynamic Equations, Mathematical Models, Solar Magnetic Field, Space Plasmas, Stellar Models, Velocity Distribution, Photosphere, Plasma Density, Rayleigh Equations, Solar Atmosphere, Solar Gravitation, Solar Prominences, Taylor Instability
Scientific paper
A problem of the gravitational fall of dense plasma blob in the semicircular coronal magnetic loop is studied using a one dimensional hydrodynamic code. Considering the thermal conduction and radiative losses are fully compensated by a appropriate heating, it is shown that the falling dense plasma blob compresses the underlying coronal plasma and thus, the blob is decelerated and reflected. This process together with a decompression in the opposite side of coronal loop leads to the oscillation movement of dense plasma blob and eventually to the stop of this blob in some equilibrium position, in which the blob is supported by the pressure of an underlying plasma. This process is very sensitive to the deviation from full compensation of heating, radiative and thermal conduction losses. Nevertheless, it seems that the pressure with the appropriate heating can support the dense and cold plasma, for example in solar prominences, where their magnetic field is stabilizing the Rayleigh-Taylor instability of heavy gas above the lighter one.
Karlicky Marian
Simnett George M.
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