Solar activity studies through coronal X-ray observations

Details Solar activity studies through coronal X-ray observations Solar activity studies through coronal X-ray observations

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000rspta.358..641h&link_type=abstract

Royal Society of London Transactions Series A, vol. 358, Issue 1767, p.641-655

Physics

Solar Physics X-Ray Solar Activity Yohkoh Soho Euv

Scientific paper

The solar corona consists of high-temperature plasma that is contained by a wide range of magnetic field structures. The cyclic behaviour of solar activity results in continuing evolution of these structures. This evolution can be well studied by observing the X-ray and extreme ultraviolet (EUV) emission from the hot plasma which delineates the magnetic field in the corona. In this review, the X-ray images obtained from the Yohkoh mission over more than half a solar cycle and the information they provide about coronal evolution will be discussed. A variety of short-term transient brightenings observed by Yohkoh, and at EUV wavelengths by the SOHO mission, will be described and their relevance for coronal heating evaluated. Yohkoh observations have advanced our understanding of solar flares. These important results will be summarized and discussed. Finally, the current view of the nature of coronal mass ejections as deduced by Yohkoh and SOHO is presented.

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