1998/05/06 by I. Kamp, Kamp, I., H. Holweger +1
Engineering · Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Space Exploration and Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9805053
5 pages, 3 figures, to appear in: Proc. of the 26th workshop of the European Working Group on CP stars, eds. P. North, A. Schnell and J. Ziznovsky, Contrib. Astr. Obs. Skalnate Pleso Vol. 27, No 3
arxiv created 1998/05/06 · openalex publication_date 1998/05/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 ~30. Similar models are suggested for the group of metal-deficient lambda Bootis stars, but the observational material is still very poor.