Abstract
Element abundances have been determined for a solar active region observed to have a highly nonphotospheric Ne/Mg abundance ratio associated with an open magnetic field. This active region is an example of a class of relatively inconspicuous features with open magnetic fields which contrast with brighter, more compact emission regions with less anomalous abundance ratios. The study is based on images of the active region in Ne VI, VII, Mg VI-VIII, Na VIII, Si VIII, and Ca VIII, IX photographed in the 300-600 A range by the NRL spectroheliograph on Skylab. Element abundances relative to magnesium were determined by combining plots of the ion differential emission measures
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.