Simultaneous Hα and X-ray observations of prominence eruption and disappearance Original Research Article

Prominence eruptions or disappearances observed with an Hα limb filtergraph can be classified into 3 categories, the eruptive prominence, the quasi-eruptive prominence, and the disappearing prominence. We investigated their mechanism by comparing the results of simultaneous observations by Yohkoh SXT and Hα. We found that soft X-ray features change in both eruptive prominences and quasieruptive prominences, whereas no significant change takes place in disappearing prominences.