Investigation of Quasi-periodic Oscillations with Periods P > 120 s in hard X-rays of Solar Flares

Details Investigation of Quasi-periodic Oscillations with Periods P > 120 s in hard X-rays of Solar Flares Investigation of Quasi-periodic Oscillations with Periods P > 120 s in hard X-rays of Solar Flares

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...122.100j&link_type=abstract

"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,

Physics

Scientific paper

In our previous paper (Cent. Eur. Astrophys. Bull. 32, 65) we have investigated quasi-periodic oscillations in HXRs of solar flares with periods P = 10-60 s. In the present paper we investigate a few flares with periods P > 120 s. Hard X-ray images of these flares show large triangular structures. We have investigated a hypothesis that they are cusp-like magnetic structures, in which MHD oscillations of magnetic traps are confined. Detailed analysis of the periods and the sizes of the HXR structures has confirmed this hypothesis.

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