Observations of the South coronal hole from EIT and YOHKOH

Details Observations of the South coronal hole from EIT and YOHKOH Observations of the South coronal hole from EIT and YOHKOH

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.0206h&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #02.06; Bulletin of the American Astronomical Society, Vol. 28, p.821

Astronomy and Astrophysics

Astronomy

Scientific paper

The Extreme ultraviolet Imaging Telescope (EIT) on board the SOHO spacecraft is capable of studying solar transition region, chomospheric and coronal plasmas over bandpasses optimized for He II 304 Angstroms (0.08 MK), Fe IX/X 171, 173 Angstroms (0.8 - 1.0 MK), Fe XII 195 Angstroms (1.5 MK), and Fe XV 284 Angstroms (2.0 - 2.5 MK) with 2.5 arcsecond spatial resolution. This telescope in concert with the Yohkoh/SXT instrument allows us to simultaneously observe solar structures at temperatures ranging from less than 0.1MK in the transition region to over 3MK in the solar corona. EIT has had several opportunities to observe the South coronal hole with high spatial and temporal resolution. We compare observations from EIT and SXT with an eye towards correlating temporal variations over the range of wavelengths, activity of polar crown filament systems and relating large-scale morphology of the X-ray corona to the transition region in He II.

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