A four-parameter model which assumes a Gaussian dependence of both temperature and pressure on distance from center is used to fit the compact part of coronal active regions as observed in X-ray photographs from a rocket experiment. The four parameters are the maximum temperature TM, the maximum pre
The results of statistical analysis of the coronal profiles above the solar active regions
โ Scribed by E. I. Tetruashvili
- Publisher
- Springer
- Year
- 1977
- Tongue
- English
- Weight
- 154 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
โฆ Synopsis
In order to establish some regularities or variations in the distribution of widths and intensities of the coronal line profiles A5303 and A6374 depending upon the solar activity, a statistical analysis was made for more than 3000 profiles (the data covering the period 1966-1972).
The following results obtained:
(1) The distribution of coronal line profile widths changes depending upon the solar activity phase.
(2) The character of the relation between the intensities and widths varies with variation of the solar activity phase.
๐ SIMILAR VOLUMES
The temperature and density structure of a 'typical' coronal active region is deduced from X-ray observations of several active regions. Observations of the limb transits of three regions from OSO-5 indicate that the X-ray emission originates between 2 x 104 km and 1.5 โข 105 km. An emission measure-
Daily solar radio flux at six different frequencies in dm, cm and mm wavelength regions has been studied for 182 days from December 1, 1970 to May 30, 1971. It is found that the slowly varying component of the centimeter wave emission correlates well with the physical model of the coronal active reg