Go to previous page Go up Go to next page

2.5 Standard flare model

The assumption of a strict causal relation between soft X-ray emission and hard X-ray signatures of energetic electrons has lead to a simple scenario. It postulates that flare energy release consists of accelerating particles. The acceleration process is not part of the model. Energetic particles then precipitate to the chromosphere, where they heat the plasma to the high temperatures observed in soft X-rays. The hot plasma expands along the loop into the corona, a process termed “evaporation”. This simple scenario can explain several phenomena observed in flares:

Henceforth we refer to this scenario as the standard model (Figure 13View Image).

View Image

Figure 13: A schematic drawing of the standard flare scenario assuming energy release at high altitudes.

  Go to previous page Go up Go to next page