New Results of Spectral Observations of CP Stars in the Li I 6708 Å Spectral Region with the 6-m BTA Telescope

N. Polosukhina, A. Shavrina, N. Drake, D. Kudryavtsev, M. Smirnova

Research output

Abstract

The lithium problem in Ap-CP stars has for a long time been a subject of debates. Individual characteristics of CP stars, such as a high abundance of rare-earth elements, the presence of magnetic fields, complex structures of the surface distribution of chemical elements, rapid oscillations of some CP stars, make the detection of lithium lines, and determination of lithium abundance a challenging task. The lithium problem in Ap-CP stars was discussed during the meeting in Slovakia in 1996. The results of the Li study, carried out in CrAO (Polosukhina, 1973 - 1976), the works of Faraggiana & Hack (1963), Wallerstein & Hack (1964), Faraggiana et al. (1992 - 1996) formed the basis of the international project, called Lithium in the Cool CP Stars with Magnetic Fields. The main goal of the project was, using systematical observations of Ap-CP stars with phase rotation in the spectral regions of the resonance doublet Li I 6708 A and subordinate 6104 A lithium lines with different telescopes, to create a database, w
Original languageEnglish
Title of host publicationMagnetic Stars. Proceedings of the International Conference
Pages374-381
Publication statusPublished - 2011

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Polosukhina, N., Shavrina, A., Drake, N., Kudryavtsev, D., & Smirnova, M. (2011). New Results of Spectral Observations of CP Stars in the Li I 6708 Å Spectral Region with the 6-m BTA Telescope. In Magnetic Stars. Proceedings of the International Conference (pp. 374-381)