SIMBAD references

2003A&A...405..753I - Astronomy and Astrophysics, volume 405, 753-762 (2003/7-2)

New measurement of the 6Li/7Li isotopic ratio in the extra-solar planet host star HD 82943 and line blending in the Li 6708 Å region.


Abstract (from CDS):

The presence of possible blends in the spectral region of the Li resonance line at 6708 Å in solar-type metal-rich stars is investigated using high resolution and high signal-to-noise spectroscopic observations. Our analysis does not confirm the identification of a weak absorption feature at 6708.025Å with the low excitation TiI line proposed by Reddy et al. (2002MNRAS.335.1005R). Our spectrum synthesis suggests that the unidentified absorption is most probably produced by a high excitation SiI line originally proposed by Mueller et al. (1975SoPh...41...53M). Reanalysis of the 6Li/7Li isotopic ratio in HD82943 was performed by taking the SiI line into account and using new VLT/UVES spectra of HD82943 with a signal-to-noise ratio close to 1000. We confirm the presence of 6Li in the star's atmosphere while the updated value for the isotopic ratio is f(6Li)=0.05±0.02.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: chemically peculiar - line: identification - line: profiles

Simbad objects: 20

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