The Coronal Structure of Active Regions
Abstract
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 pressure PM= 2NMkTM, the width of the pressure distribution σP, and the width of the temperature distribution σT = α1/2σP. The maximum temperature TM ranges from 2.2 to 2.8 × 106K, and the maximum density NM from 2 to 9 × 109cm−3. The range of σP is from 2 to 4 × 109 cm and that of α from 2 to 7.
- Publication:
-
Solar Physics
- Pub Date:
- September 1975
- DOI:
- 10.1007/BF00156847
- Bibcode:
- 1975SoPh...44...69L
- Keywords:
-
- Atmospheric Models;
- Atmospheric Pressure;
- Atmospheric Temperature;
- Solar Activity Effects;
- Solar Corona;
- Solar X-Rays;
- Astronomical Models;
- Normal Density Functions;
- Photography;
- Radiant Flux Density;
- Radiography;
- X Ray Astronomy;
- Solar Physics;
- Temperature Distribution;
- Active Region;
- Pressure Distribution;
- Maximum Pressure;
- Maximum Density