Flare-associated shock waves observed in soft X-ray

Noriyuki Narukage and Kazunari Shibata

In H-alpha, a flare-associated chromospheric wave (called a Moreton wave) was discovered in 1960, and after that such waves are sometimes observed. Uchida (1968, 1974) identified the Moreton wave as the intersection of a coronal MHD fast-mode shock and the chromosphere. Recently, the Soft X-ray Telescope (SXT) on board Yohkoh observed coronal wave-like disturbances (X-ray waves). Narukage et al. (2002, 2004) showed two X-ray waves are MHD fast-mode shock, i.e., coronal counterparts of the Moreton waves, and estimated the Alfven Mach number of the X-ray waves. The Solar-B has X-Ray Telescope (XRT) on board and will be launched in 2006. We expect XRT will detect coronal X-ray waves. In preparation for Solar-B, we examine the detectable possibility of waves with XRT and suggest methods for observation.

Correspondence

NARUKAGE Noriyuki (naru@kwasan.kyoto-u.ac.jp)

presentation

oral