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Session 37 - First Results from the Solar and Heliospheric Observatory (SOHO).
Display session, Tuesday, June 11
Tripp Commons,

[37.18] There's No Such Thing as the Quiet Sun: EUV Movies from SOHO\/

J. B. Gurman (LASP, NASA/GSFC), J. P. Delaboudinière, G. Artzner, A. Gabriel (IAS, U. Paris-Sud), A. Maucherat (LAS), J. M. Defise, C. Jamar, P. Rochus (CSL), F. Clette, P. Cugnon (ORB), R. Howard, D. Michels, J. D. Moses, K. Dere (NRL), O. C. St. Cyr (CPI), R. Catura, S. Freeland, J. Lemen, R. Stern (LMPARL), W. Neupert (NOAA-SEC), E. Einfalt (Hughes STX), J. Newmark (ARC)

We present unique time series of high-resolution solar images from the normal-incidence Extreme ultraviolet Imaging Telescope (EIT) on board the SOHO\/ spacecraft. With a pixel scale of 2.6 arc sec and a detector dynamic range of > 10^4, the EIT can be used to study the dynamics of chromospheric and coronal features in multilayer bandpasses optimized for He II 304 Å\ (0.08 MK), Fe IX/X 171, 173 Å\ (0.8 - 1.0 MK), Fe XII 195 Å\ (1.5 MK), and Fe XV 284 Å\ (2.0 - 2.5 MK). Among the most striking features of the digital movies we will display are: the dynamic nature of small-scale loop features in the polar coronal holes, the constant activity of the polar crown filament systems, the locations of the bases of polar plumes, the presence of dark (scattering) filament material in the coronal emission line images, and the evolution of a unique, linear, dark feature in a young active region. The latter feature is suggestive of the ``coronal void'' observed in the electron scattering corona by Macqueen et al.\/ (1983).

Program listing for Tuesday