SOHO EIT Observations of Coronal Holes

Details SOHO EIT Observations of Coronal Holes SOHO EIT Observations of Coronal Holes

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.446..509n&link_type=abstract

8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona. Proceedings of the Conference hel

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present a study of coronal holes (not including the polar holes) using observations from SOHO EIT during 1996 and 1997. EIT obtains daily full disk observations of the Sun at spectral emission lines from FeIX,X (171 A), FeXII (195 A), FeXV (284 A), and HeII (304 A). Previous studies (mainly He I 10830 A and ground based magnetograms) have demonstrated the role that bipolar magnetic regions play in their evolution as well as rotation rates for recurrent coronal holes. We further the correlation between coronal holes and bipolar fields by presenting definitive symbiotic relationships between coronal holes and active regions. Comparisons of EUV observations and magnetograms plus potential field extrapolations are shown.

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