Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO. (arXiv:1812.05100v1 [astro-ph.SR])

Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO. (arXiv:1812.05100v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Caffau_E/0/1/0/all/0/1">E. Caffau</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bonifacio_P/0/1/0/all/0/1">P. Bonifacio</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oliva_E/0/1/0/all/0/1">E. Oliva</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Korotin_S/0/1/0/all/0/1">S. Korotin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Capitanio_L/0/1/0/all/0/1">L. Capitanio</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Andrievsky_S/0/1/0/all/0/1">S. Andrievsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Collet_R/0/1/0/all/0/1">R. Collet</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sbordone_L/0/1/0/all/0/1">L. Sbordone</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Duffau_S/0/1/0/all/0/1">S. Duffau</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sanna_N/0/1/0/all/0/1">N. Sanna</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Origlia_L/0/1/0/all/0/1">L. Origlia</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ryde_N/0/1/0/all/0/1">N. Ryde</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ludwig_H/0/1/0/all/0/1">H.-G. Ludwig</a>

Detailed chemical abundances of Galactic stars are needed in order to improve
our knowledge of the formation and evolution of our galaxy, the Milky Way. We
took advantage of the GIANO archive spectra to select a sample of Galactic disc
stars in order to derive their chemical inventory and to compare the abundances
we derived from these infrared spectra to the chemical pattern derived from
optical spectra. We analysed high-quality spectra of 40 stars observed with
GIANO. We derived the stellar parameters from the photometry and the Gaia
data-release 2 (DR2) parallax; the chemical abundances were derived with the
code MyGIsFOS. For a subsample of stars we compared the chemical pattern
derived from the GIANO spectra with the abundances derived from optical
spectra. We derived P abundances for all 40 stars, increasing the number of
Galactic stars for which phosphorus abundance is known. We could derive
abundances of 14 elements, 8 of which are also derived from optical spectra.
The comparison of the abundances derived from infrared and optical spectra is
very good. The chemical pattern of these stars is the one expected for Galactic
disc stars and is in agreement with the results from the literature. GIANO is
providing the astronomical community with an extremely useful instrument, able
to produce spectra with high resolution and a wide wavelength range in the
infrared.

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