For these two young active stars, the microflare hypothesis for coronal heating may then be valid. These stars have solar-like coronae, and they show enhanced coronal and chromospheric activity. The power-law indices cluster around a value of 2, although they may be different for different stellar spectral types. A trend for a flattening of the distributions with later spectral types is suggested in our data. We have further explored whether flares are correlated with some physical properties of stars, such as activity indicators and rotation parameters.
Flares can therefore provide a significant amount of energy to heat the coronae of active stars.
The definite answer to which mechanism is responsible for the coronal heating is not yet available. Data groups correspond to different fitting methods. 2 Hudson, H. S., Sol.