Observations of X-Ray Jets Using Yohkoh Soft X-Ray Telescope

Time series of SXT (Soft X-ray Telescope) images have revealed many jet-like features in the solar corona. Typical size of the "jet" is 5 x 10 3 — 4 x 10 5 km, the typical projected velocity is 30 — 300 km/s, and the kinetic energy estimated to be 10 25 — 10 28 erg. Many of the jets are associated with flare-like bright points or sub-flares. Three typical examples are discussed, including an X-ray jet identified with an Ha surge. It is suggested that magnetic reconnection is one of the possible mechanisms to produce these X-ray jets.