CM DRACONIS: DERIVING CORONAL STRUCTURING FROM ECLIPSES

CM Draconis is the least massive, fully eclipsing doubleline spectroscopic binary system known, with component masses of about 0.2 solar masses. The two almost identical components eclipse each other every 15.2 hours. Eclipse studies of such systems are pivotal for our understanding of coronal structuring. Wepropose to monitor two (one primary, one secondary) eclipses. We request twotimes 3.8 hours of exposure time each centered at one of the eclipses. Lightcurve inversion techniques will then be sensitive to coronal structures out toabout 3 stellar radii from each component. This investigation will provide newinsight into extent, structure, and density of active stellar coronae. Resultswill be compared with the earliertype, much more active YY Gem system. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]