Abstract
This chapter discusses the application of Yohkoh /Soft X-ray Telescope (SXT) in measuring the net current and coronal mass ejection (CME) productivity of active regions. In the study described in the chapter, Yohkoh /SXT images were used for two purposes: (1) to check for the cusped coronal arcades of long-duration eruptive flares, a proxy for CMEs, and (2) to assist in determining an active-region's net electric current, a measure of the region's global non-potentiality. The net electric current is calculated from Ampere's law, integrating the transverse magnetic field around a contour encompassing either the leading or the trailing polarity of the active region. The X-ray images show coronal structures that reveal the sense of shear, thus indicating the proper resolution of the ambiguity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
