Kinematic characteristics of the surge on March 19, 1989

摘要: The H-alpha filtergrams, off-band images and spectra of a surge accompanying active objects were obtained at Yunnan Observatory on March 19,1989. Magnetograms the corresponding super-active region also Huairou-Beijing Observatory. morphology evolution other are considered based filtergrams. analysis spectral profiles allows us to derive two-dimensional kinematic behaviours velocity fields objects. A two-cloud model Beckers's one-cloud applied discussed. results show that is present not only as an ascending movement with average V about 70 kms(-1), but rotational motion angular omega 1.5 x 10(-3) arc.s(-1). Both motions decrease height above solar limb. An expansion 25 kms(-1) detected. helical in can be explained successfully by theory plasma double pole diffusion caused sharp density gradient between surrounding corona.