Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..311f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 311-325.
Astronomy and Astrophysics
Astronomy
32
Peculiar Stars, Spectrum Analysis, Stellar Spectra, Ultraviolet Spectra, Abundance, Astronomical Catalogs, Iue, Line Spectra, Metallicity, Sky Surveys (Astronomy)
Scientific paper
The spectra of all the stars previously classified as Lambda Bootis stars and observed by the IUE satellite at low resolution, in the short wavelength range, are analyzed. The usefulness of this spectral range for classifying the Lambda Boo stars is shown; the UV criteria used to distinguish the Lambda Boo stars from other metal-deficient stars are selected and applied. The origin of the Lambda Boo phenomenon is not yet clear (Baschek and Slettebak, 1988) and a careful selection of the candidates is the first step for a clear definition of the theoretical problem. From the present study, it turns out that only seven out of the 19 candidates can be assigned to the Lambda Boo group, while for the other stars the previous classification must be considered eroneous. The peculiarities of the other metal-deficient, but not Lambda Boo, stars are discussed.
Boehm Celine
Faraggiana Rosanna
Gerbaldi Michèle
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