First Observations of Coronal Hole Structure and Evolution Using Soho-Cds |
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| Authors: | J E Insley V Moore R A Harrison |
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| Institution: | (1) Space and Atmospheric Physics Group, Blackett Laboratory, Imperial College, London, SW7 2BZ, U.K;(2) Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, U.K |
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| Abstract: | We report on initial observations of coronal holestructure and evolution by the Coronal Diagnostic Spectrometer (CDS) instrument
on board the Solar and Heliospheric Observatory (SOHO). The data show that there is coronal activity on time scales of tens
of minutes, manifested as brightenings at chromospheric network cell junctions in extreme ultraviolet (EUV) wavelengths. There
are also significant differences in structure seen in different wavelengths in coronal holes. Finally, we show coronal hole
EUV spectra and compare them to quiet-Sun spectra, also taken by CDS. |
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