Coronal density and temperature structure from coordinated observations associated with the total solar eclipse of 1988 March 18
1992; IOP Publishing; Volume: 388; Linguagem: Inglês
10.1086/171180
ISSN1538-4357
AutoresM. Guhathakurta, G. J. Rottman, Richard R. Fisher, F. Q. Orrall, R. C. Altróck,
Tópico(s)Ionosphere and magnetosphere dynamics
Resumoview Abstract Citations (54) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Coronal Density and Temperature Structure from Coordinated Observations Associated with the Total Solar Eclipse of 1988 March 18 Guhathakurta, M. ; Rottman, G. J. ; Fisher, R. R. ; Orrall, F. Q. ; Altrock, R. C. Abstract This paper explores and compares diagnostics for temperature and density within large-scale structures of the inner corona based on cospatial and cotemporal spectrophotometric observations made at the time of the total solar eclipse of 1988 March 17/18. In the analysis a determination of plasma temperature T can be derived unambiguously from the intensity ratios Fe XIV/XUV or Fe XIV/Fe X since all the emission lines come from the ionized state of Fe and the ratios are only weakly dependent on density. These temperatures and the densities found in well-defined large-scale coronal structures are discussed. The emission-line temperature is found to be high (local maxima) in the coronal structures with enhanced white-light emission and associated with new cycle high-latitude magnetic fields separated from the old cycle polar field of opposite polarity. Also the average of the ratio of scale-height temperature/temperature over the entire range of position angle is roughly unity although the ratio is higher than unity (1.3-1.6) in the three most prominent streamers. Publication: The Astrophysical Journal Pub Date: April 1992 DOI: 10.1086/171180 Bibcode: 1992ApJ...388..633G Keywords: Solar Corona; Solar Eclipses; Solar Spectra; Solar X-Rays; Temperature Profiles; X Ray Imagery; Electron Density (Concentration); Plasma Temperature; Rocket Sounding; Solar Electrons; Solar Physics; ECLIPSES; SUN: CORONA full text sources ADS |
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