Energy Release During Slow Long Duration Flares Observed by RHESSI

Details Energy Release During Slow Long Duration Flares Observed by RHESSI Energy Release During Slow Long Duration Flares Observed by RHESSI

2011-04-05

arxiv.org/abs/1104.0842v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for publication in Solar Physics

Scientific paper

Slow Long Duration Events (SLDEs) are flares characterized by long duration of rising phase. In many such cases impulsive phase is weak with lack of typical short-lasting pulses. Instead of that smooth, long-lasting Hard X-ray (HXR) emission is observed. We analysed hard X-ray emission and morphology of six selected SLDEs. In our analysis we utilized data from RHESSI and GOES satellites. Physical parameters of HXR sources were obtained from imaging spectroscopy and were used for the energy balance analysis. Characteristic time of heating rate decrease, after reaching its maximum value, is very long, which explains long rising phase of these flares.

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