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J/A+A/595/A18       Lithium abundances in AMBRE stars        (Guiglion+, 2016)

The AMBRE Project: Constraining the lithium evolution in the Milky Way. Guiglion G., de Laverny P., Recio-Blanco A., Worley C. C., De Pascale M., Masseron T., Prantzos N., Mikolaitis S. <Astron. Astrophys. 595, A18 (2016)> =2016A&A...595A..18G (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way; Stars, F-type ; Stars, G-type ; Stars, K-type ; Abundances ; Spectroscopy Keywords: galaxy: abundance - galaxy: stellar content - Galaxy: formation - stars: abundance Abstract: The goal of this paper is to investigate the lithium stellar content of Milky Way stars in order to put constraints on the lithium chemical enrichment in our Galaxy, in particular in both the thin and thick discs. We show that the interstellar lithium abundance increases with metallicity by 1dex from [M/H]=-1dex to +0.0dex. Moreover, we find that this lithium ISM abundance decreases by about 0.5dex at super-solar metallicity. Based on a chemical separation, we also observed that the stellar lithium content in the thick disc increases rather slightly with metallicity while the thin disc shows a steeper increase. The lithium abundance distribution of alpha-rich metal-rich stars has a peak at A(Li)∼3 dex. We conclude that the thick disc stars suffered of a low lithium chemical enrichment, showing lithium abundances rather close to the Spite plateau while the thin disc stars clearly show an increasing lithium chemical enrichment with the metallicity, probably thanks to the contribution of low-mass stars. Description: Thanks to high resolution spectra from the ESO FEROS, UVES and HARPS archive and high quality atmospheric parameters, we have been able to build a massive and homogeneous catalogue of lithium abundances for 7272 stars derived with an automatic method coupling a synthetic spectra grid and a Gauss-Newton algorithm. These lithium abundances have been validated with literature values, including those of the Gaia benchmark stars. We provide the star identifier, the spectrograph name, the LTE lithium abundance and its error, and the NLTE correction. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file lithium.dat 47 7272 Star identifier, spectrograph, LTE lithium abundance, error and NLTE correction
See also: J/A+A/564/A133 : Gaia FGK benchmark stars: metallicity (Jofre+, 2014) J/A+A/566/A98 : The Gaia Benchmark Stars - Library (Blanco-Cuaresma+, 2014) J/A+A/582/A81 : Gaia FGK benchmark stars: abundances (Jofre+, 2015) J/A+A/592/A70 : Gaia FGK stars: low-metallicities candidates (Hawkins+, 2016) Byte-by-byte Description of file: lithium.dat
Bytes Format Units Label Explanations
1- 25 A25 --- Name Star identifier 27 A1 --- Spectro [HUF] Spectrograph (1) 29 A1 --- l_ALi Limit flag on ALi 30- 34 F5.2 --- ALi LTE lithium abundance 36- 39 F4.2 --- e_ALi ? rms uncertainty on ALi 42- 47 F6.3 --- NLTE ? NTLE correction
Note (1): Spectrograph code as follows: H = HARPS U = UVES F = FEROS
Acknowledgements: Guillaume Guiglion, guillaume.guiglion(at)oca.eu
(End) Guillaume Guiglion [OCA, France], Patricia Vannier [CDS] 09-Aug-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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