Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2483...15f&link_type=abstract
In NASA-Goddard Space Flight Center, Theoretical Problems in High Resolution Solar Physics, 2 p 15-35 (SEE N88-11609 02-92)
Physics
2
Chromosphere, Coronal Loops, Flow Distribution, Photosphere, Spicules, Energy Transfer, Mass Transfer, Solar Atmosphere, Solar Physics, Stokes Flow
Scientific paper
A wide range of observations has shown that active region phenomena in the photospheric, chromospheric and coronal temperature regimes are dynamical in nature. At the photosphere, recent observations of full line profiles place an upper limit of about + or - 20/msec on any downflows at supergranule cell edges. Observations of the full Stokes 5 profiles in the network show no evidence for downflows in magnetic flux tubes. In the area of chromospheric dynamics, several models were put forward recently to reproduce the observed behavior of spicules. However, it is pointed out that these adiabatic models do not include the powerful radiative dissipation which tend to damp out the large amplitude disturbances that produce the spicular acceleration in the models. In the corona, loop flows along field lines clearly transport mass and energy at rates important for the dynamics of these structures. However, advances in understanding the heating and mass balance of the loop structures seem to require new kinds of observations. Some results are presented using a remote sensing diagnostic of the intensity and orientation of macroscopic plasma electric fields predicted by models of reconnective heating and also wave heating.
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