Shock wave transit through the transition region and related radio fluctuations
Abstract
The effects of the passage of a shock wave through the solar transition region on the brightness temperature of the region at decimetric wavelengths are evaluated. A simplified method is used to solve the partial differential equations describing the fluid motion behind the shock front, resulting in models of the temperature and density perturbations caused by the passage of the shock. Shock-perturbed brightness temperatures are then calculated for wavelengths of 60, 80 and 100 cm at various times after shock passage, and a measured temperature fluctuation amounting to 1% is obtained. Results are noted to be in agreement with observed fluctuations, thus supporting the wave hypothesis for the origin of the phenomenon for times less than the radiative and conductive cooling times.
- Publication:
-
Radio Physics of the Sun
- Pub Date:
- 1980
- DOI:
- 10.1017/S0074180900036639
- Bibcode:
- 1980IAUS...86...57P
- Keywords:
-
- Brightness Temperature;
- Decimeter Waves;
- Shock Wave Propagation;
- Solar Oscillations;
- Solar Radio Emission;
- Centimeter Waves;
- Partial Differential Equations;
- Time Dependence;
- Solar Physics