Coronal holes as seen in soft X-rays by Yohkoh

Details Coronal holes as seen in soft X-rays by Yohkoh Coronal holes as seen in soft X-rays by Yohkoh

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.508..341h&link_type=abstract

In: Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switze

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2

Coronal Holes, Solar Wind, X-Rays

Scientific paper

This paper reviews literature on the 10-plus years of Yohkoh soft X-ray observations of coronal holes (CHs), which span almost half a Hale cycle. They thus extend and generalize the results of Skylab, providing better sampling and duration. These modern X-ray data confirm the tendency towards rigid rotation of equatorward extensions of polar holes, but show no clear sign of the mechanism of magnetic reconnection that makes this possible. Coronal-hole boundary evolution does not seem to depend upon transient magnetic activity such as X-ray bright points or large-scale arcade events associated with transient coronal holes. The morphology of the coronal holes as seen in X-rays differs from that seen in He I λ10830: X-rays generally do not do so well with the polar holes or other holes near the limb, because of foreground confusion, but they show narrow features better.

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