Energy spectrum of X-ray flares associated with sunspot groups of different classes in three solar cycles

Details Energy spectrum of X-ray flares associated with sunspot groups of different classes in three solar cycles Energy spectrum of X-ray flares associated with sunspot groups of different classes in three solar cycles

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ge%26ae..50..905s&link_type=abstract

Geomagnetism and Aeronomy, Volume 50, Issue 7, pp.905-907

Physics

Scientific paper

The integral energies of flares associated with active regions of different classes of sunspot groups were calculated on the basis of direct measurements of X-ray fluxes from flares (1-8Å, GOES) for three solar cycles (1977-2007). The integral energy spectra were constructed, and their indices β were calculated for flares in active regions of each class. It was established that the value of parameter β is different for the active regions of different classes. A positive correlation between this parameter and the 11-year cycle (the Wolf number) was revealed for each class. Parameter β is related to the 22-year magnetic cycle. Our results can be used in the dynamo and flare theories.

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