Is it justified to assume that 'Everywhere in the sun's photosphere-corona domain the electric conductivity is HIGH?'; or, what drives the solar upper atmosphere?
1993; IOP Publishing; Volume: 411; Linguagem: Inglês
10.1086/172894
ISSN1538-4357
Autores Tópico(s)Solar and Space Plasma Dynamics
Resumoview Abstract Citations (28) References (49) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Is It Justified to Assume that ``Everywhere in the Sun's Photosphere-Corona Domain the Electric Conductivity Is High''?; or, What Drives the Solar Upper Atmosphere? Feldman, Uri Abstract For many years, solar scientists have recognized the extreme complexity of the upper solar atmosphere. However, in order to construct a valid theoretical model they have formulated a set of simplified assumptions governing the makeup of the sun's upper atmosphere. In previous papers a number of assumptions used to construct the models were shown not to be valid. In this Paper I bring evidence to question the validity of the last and most important of the assumptions, the assertion that 'Everywhere in the photosphere-corona domain the electric conductivity is HIGH'. The consequences of the finding are briefly discussed. A laboratory measurement of the electrical conductivity versus temperature in a gas with photospheric composition would resolve this important issue and seem to be feasible. Publication: The Astrophysical Journal Pub Date: July 1993 DOI: 10.1086/172894 Bibcode: 1993ApJ...411..896F Keywords: Electrical Resistivity; Magnetohydrodynamics; Photosphere; Solar Atmosphere; Solar Corona; Upper Atmosphere; Ion Charge; Metal Ions; Solar Eclipses; Solar Spectra; Visible Spectrum; Solar Physics; MAGNETOHYDRODYNAMICS: MHD; SUN: ATMOSPHERE; SUN: CORONA full text sources ADS |
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