Search Publications

Current ideas about the production of the electroglow of Uranus

Clarke, J. T.

A process known as ``electroglow'' was identified by Broadfoot et al. /1/ shortly after the Voyager Uranus encounter as soft charged particle excitation of atmospheric gas in the presence of sunlight and in excess of the available photoelectron energy. Localized aurora and diffuse H and H₂ band emissions have been observed from Uranus, …

First ultraviolet observations of the transition regions of X-ray bright solar-type stars in the Pleiades

Linsky, J. L.; Caillault, J. -P.; Vilhu, O.

Nearby clusters, such as Ursa Major, the Hyades, and the Pleiades, have been extensively studied in the X-ray regime. The first two clusters have also been studied with the IUE. However, the younger, fainter Pleiades cluster, which contains the youngest, and presumably most active, main sequence stars in the solar vicinity, had not been observed i…