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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28374
Title: Gaia-ESO Survey: INTRIGOSS—A New Library of High-resolution Synthetic Spectra
Authors: FRANCHINI, Mariagrazia 
MOROSSI, Carlo 
DI MARCANTONIO, Paolo 
Chavez, Miguel
Gilmore, Gerry
RANDICH, Maria Sofia 
FLACCOMIO, Ettore 
Koposov, Sergey E.
Korn, Andreas J.
Bayo, Amelia
Carraro, Giovanni
Casey, Andy
FRANCIOSINI, Elena 
Hourihane, Anna
Jofré, Paula
Lardo, Carmela
Lewis, James
MAGRINI, LAURA 
MORBIDELLI, LORENZO 
SACCO, GIUSEPPE GERMANO 
Worley, Clare
Zwitter, Tomaz
Issue Date: 2018
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 862
Issue: 2
First Page: 146
Abstract: We present a high-resolution synthetic spectral library, INTRIGOSS, designed for studying FGK stars. The library is based on atmosphere models computed with specified individual element abundances via ATLAS12 code. Normalized SPectra (NSPs) and surface Flux SPectra (FSP) in the wavelength range 4830-5400 Å were computed with the SPECTRUM code. INTRIGOSS uses the solar composition of Grevesse et al. and four [α/Fe] abundance ratios, and consists of 15,232 spectra. The synthetic spectra are computed with astrophysical gf-values derived by comparing synthetic predictions with a solar spectrum of very high signal-to-noise ratio and the UVES-U580 spectra of five cool giants. The validity of the NSPs is assessed by using the UVES-U580 spectra of 2212 stars observed in the framework of the Gaia-ESO (European Southern Observatory) survey and characterized by homogeneous and accurate atmospheric parameter values and by detailed chemical compositions. The greater accuracy of NSPs with respect to spectra from the synthetic spectral libraries AMBRE, GES_Grid, PHOENIX, C14, and B17 is demonstrated by evaluating the consistency of the predictions of the different libraries for stars in the UVES-U580 sample. The validity of the FSPs is checked by comparing their prediction with both the observed spectral energy distribution (SED) and spectral indices. The comparison of FSPs with SEDs derived from the libraries ELODIE, INDO-U.S., and MILES indicates that the former reproduce the observed flux distributions within a few per cent and without any systematic trend. The good agreement between observational and synthetic Lick/SDSS (Sloan Digital Sky Survey) indices shows that the predicted blanketing of FSPs well reproduces the observed one, thus confirming the reliability of INTRIGOSS FSPs.
URI: http://hdl.handle.net/20.500.12386/28374
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aaca3c
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aaca3c
Bibcode ADS: 2018ApJ...862..146F
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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