Coordinated Optical and UV Observations of the Short Period RS CVn System DH Leo
Abstract
We propose to observe the short-period RS CVn system DH Leo with IUE to investigate the presence of "prominence-like" material surrounding the secondary component. Observations will be made with the SWP camera in low dispersion outside and during primary conjunction. If the chromospheric lines in the SWP region arise from the same plasma as H-alpha we should see decreased emission at conjunction. The behavior of the hotter lines (N V, Si IV, C IV) should allow us to constrain somewhat the location of the occulting material. The IUE observations will be accompanied by ground based spectroscopic and photometric observations to better define the state of the surface activity at that time.
- Publication:
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IUE Proposal
- Pub Date:
- 1987
- Bibcode:
- 1987iue..prop.2837R