CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): KAMP,I.; HOLWEGER, H.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 408-412.
- Date: 04/1998
- Title: Dust and gas around lambda Bootis stars
- Keyword(s): STARS: CIRCUMSTELLAR MATTER, STARS: CHEMICALLY PECULIAR,
STARS: INDIVIDUAL: BETA PICTORIS
- Pages: 408 -- 412
Abstract:
High-resolution spectra of lambda Bootis stars reveal the presence of
circumstellar gas for example in the Ca K line. The example of the normal
A star beta Pictoris shows, that the narrow stable absorption component
in Ca K can be reproduced using appropriate disk models and a calcium
underabundance in the circumstellar gas of a factor of appr. 30. Similar
models are suggested for the group of metal-deficient lambda Bootis
stars, but the observational material is still very poor.
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