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- Title
A SPECTRAL ATLAS OF λ BOOTIS STARS.
- Authors
Paunzen, E.; Heiter, U.
- Abstract
Since the discovery of λ Bootis stars, a permanent confusion about their classification can be found in literature. This group of non-magnetic, Population I, metal-poor A to F-type stars, has often been used as some sort of trash can for "exotic" and spectroscopically dubious objects. Some attempts have been made to establish a homogeneous group of stars which share the same common properties. Unfortunately, the flood of "new" information (e.g. UV and IR data) led again to a whole zoo of objects classified as λ Bootis stars, which, however, are apparent non-members. To overcome this unsatisfying situation, a spectral atlas of well established λ Bootis stars for the classical optical domain was compiled. It includes intermediate dispersion (40 and 120 Å mm-1) spectra of three λ Bootis, as well as appropriate MK standard stars. Furthermore, "suspicious" objects, such as shell and Field Horizontal Branch stars, have been considered in order to provide to classifiers a homogeneous reference. As a further step, a high resolution (8 Å mm-1) spectrum of one "classical" A λ Bootis star in the same wavelength region (3800 - 4600 Å) is presented. In total, 55 lines can be used for this particular star to derive detailed abundances for nine heavy elements (Mg, Ca, Sc, Ti, Cr, Mn, Fe, Sr and Ba).
- Subjects
STARS; WAVELENGTHS; SPECTRAL geometry; DISPERSION (Chemistry); HEAVY elements; HIGH resolution spectroscopy
- Publication
Serbian Astronomical Journal, 2014, Issue 188, p75
- ISSN
1450-698X
- Publication type
Article
- DOI
10.2298/SAJ1488075P