Computer Science
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984iue..prop.1777b&link_type=abstract
IUE Proposal ID #MLGFB
Computer Science
Scientific paper
Sharp shortward-shifted features in two (2) hot white dwarfs and three (3) O subdwarfs indicate mass loss. One O subdwarf, HD 128220 B, shows multiple components (4 in one exposure) appearing both persistent, lasting over a nine month period, and also transient in nature. We have tentatively suggested that -the mechanism responsible for these features is the same one responsible for similar features superimposed upon P Cygni profiles in luminous relatively unevolved O and B stars. The occurrence of these discrete features has not been adequately explained. However, transient features imply mass ejection events. We wish to obtain additional images of the white dwarfs displaying shifted features and monitor the sharp-lined components in HD 128220 B for changes in intensity and velocity. Results of this study will be compared with those of similar studies of the luminous O and B stars. We wish to determine the nature of the mechanism responsible for these features and ascertain if it is a universal process operating in all hot stars regardless of luminousity.
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