Absolute abundances and distribution of material versus density and temperature in a coronal condensation

✍ Scribed by Françoise Magnant-Crifo

• Publisher: Springer
• Year: 1974
• Tongue: English
• Weight: 499 KB
• Volume: 39
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00154976

✦ Synopsis

Data derived from coronal eclipse spectra in the visible range are analyzed in terms of electron density and temperature in a coronal condensation using the method recently developed by Jefferies, Orrall and Zirker. A mean density and a certain amount of material are associated to each temperature. Abundances relative to Fe are derived for Ni, Cr, Mn, S, Ca. The absolute abundance of Fe is found to be 2 • 10 -5. No absolute calibration is required. It appears that there must exist a non-negligible amount of 'cold' material (Te < 106K) in the corona, which cannot be observed in the visible spectral range.