The ultraviolet (IUE) spectra of the lambda Bootis stars.
Heck, A.; Jaschek, M.; Jaschek, C.; Wehrse, R.; Scholz, M.; Baschek, B.; Koeppen, J.
Germany, Netherlands, France
Abstract
Ultraviolet spectra of several λ Boo stars and λ Boo candidates have been obtained with the IUE satellite in low- and in high-resolution. It is possible to discriminate the λ Boo stars from the normal A stars on low resolution spectra by their strong absorption features at λλ1600, 1657(C I), 1931(C I), and 3040 Å. The λ1600 feature, about 80 Å wide and not resolved into lines in the high-resolution mode, and the λ3040 feature remain unidentified. The well-developed spectrum of neutral carbon in λ Boo suggests that C (and possibly also N) may not share the underabundances of the heavier elements.