|
|
| - What Physics determines the time |
|
| scales of radio bursts ? |
|
|
|
|
|
|
|
|
| Characteristic
speeds in solar corona: |
||||||
| - Electromagnetic waves, speed of light : c=300,000 km/s |
||||||
| - Electron beam speeds: v_B/c=0.1-0.3 |
||||||
| - Alfven waves, Alfven speed: v_A=500-5000 km/s |
||||||
| - Magnetoacoustic waves: c_s < v_MA < v_A |
||||||
| - Shock waves, supersonic speeds: v_sh ~ 300 km/s |
||||||
| - Pressure-driven waves, sound speed: c_s ~ 150 km/s |
||||||
|
|
|
|
| Characteristic spatial scales in solar corona: |
|||
| - Acceleration cells and regions: L_acc ~ 100-1000 km |
|||
| -
Flare loops: L_loop ~ 5000-50,000 km |
|||
| - Metric extent of solar corona: L_metric ~ R_sun ~ 700,000 km |
|||