于冕
于冕-
硬态：光度一般较低，以幂律辐射为主，硬光子主要由韧致辐射产生于冕区。
Hard state : the luminosity is very low , the power law radiation is domained and the hard photon is mainly produced with bremsstrahlung in the corona .
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共振磁力线振幅随时间线性增加，增加的斜率正比于Alfvn波速，反比于冕环长度，与驱动频率无关。
It is also found that the wave amplitude at resonant place increases linearly with time and the slope is proportional to Alfven wave speed , inverse proportional to loop length and independent of driven frequency .