High-resolution observations of plasma jets in the solar corona

We present recent observations of coronal jets, made by TRACE and Yohkoh/SX T on 28 May and 19 August 1998. The high spatial resolution of TRACE enable s us to see in detail the process of material ejection; in the line of Fe i x (one million degrees) we see both bright emitting material and dark absor bing/scattering material being ejected, i.e., both hot and cold material, h ighly collimated and apparently ejected along the direction of the overlyin g field lines. Bright ejecta are seen simultaneously in Lyman alpha for one event and Yohkoh/SXT in the other. The jets on the two days are different in that the 19 August jet displays the morphology typical of a one-sided an emone jet while the 28 May jet exhibits a two-sided jet morphology. The 19 August jet shows evidence for rotation and an interesting bifurcation at la rge distances from the energy release site. We study the physical propertie s and energetics of these jetting events, and conclude that existing theore tical models capture the essential physics of the jet phenomena.