6533b7d8fe1ef96bd126a539
RESEARCH PRODUCT
Gaia -ESO Survey: Analysis of pre-main sequence stellar spectra
Antonio FrascaG. G. SaccoIgnacio NegueruelaHugo M. TaberneroAndreas KornMartin AsplundC. BabusiauxLoredana PrisinzanoFrancesco DamianiNigel HamblyM. T. CostadoG. CarraroGerry GilmoreGiuseppina MicelaEmilio J. AlfaroPiercarlo BonifacioAnnette M. N. FergusonA. HourihaneMaria BergemannN. A. WaltonE. BrugalettaManuel MeyerJohn D. LewisH. W. RixMichael G. IrwinVardan AdibekyanR. BlommeP. FrancoisR. D. JeffriesA. C. LanzafameSergey E. KoposovLorenzo SpinaJames BinneyThomas MasseronL. MorbidelliD. MontesK. BiazzoS. G. SousaAntonella VallenariRodolfo SmiljanicJ. M. AlcaláThomas BensbyC. Allende PrietoSergio MessinaLuca SbordoneAmelia BayoA. BragagliaSimone ZaggiaC. C. WorleyJanet E. DrewEttore FlaccomioS. Van EckPaula JofreLaura MagriniBengt EdvardssonGianni MarconiJ. I. González HernándezMichiel CottaarRosaria BonitoLorenzo MonacoUlrike HeiterJ. F. GameiroCarmela LardoSofia FeltzingE. FranciosiniT. PrustiR. J. JacksonVanessa HillSofia RandichKarin LindCh. MartayanE. Delgado MenaA. Klutschsubject
Accuracy and precisionPopulationFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysicsstars: pre-main sequenceSurveysfundamental parameters [Stars]Astronomical spectroscopysurveysAngular diameterpre-main sequence [Stars]Astrophysics::Solar and Stellar AstrophysicsSurveydata analysis [Methods]educationSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsAstronomía y AstrofísicaPhysicseducation.field_of_studygeneral [Open clusters and associations][SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]Astronomy and AstrophysicsStars: fundamental parameterAstronomy and AstrophysicEffective temperatureopen clusters and associations: generalSurface gravitymethods: data analysisAccretion (astrophysics)StarsAstrophysics - Solar and Stellar AstrophysicsMethods: data analysis; Open clusters and associations: general; Stars: fundamental parameters; Stars: pre-main sequence; Surveys; Astronomy and Astrophysics; Space and Planetary ScienceSpace and Planetary Science[SDU]Sciences of the Universe [physics]open clusters and associations: general; surveys ; methods: data analysisAstrophysics::Earth and Planetary Astrophysicsstars: fundamental parametersMethods: data analysidescription
This paper describes the analysis of UVES and GIRAFFE spectra acquired by the Gaia-ESO Public Spectroscopic Survey in the fields of young clusters whose population includes pre-main sequence (PMS) stars. Both methods that have been extensively used in the past and new ones developed in the contest of the Gaia-ESO survey enterprise are available and used. The internal precision of these quantities is estimated by inter-comparing the results obtained by such different methods, while the accuracy is estimated by comparison with independent external data, like effective temperature and surface gravity derived from angular diameter measurements, on a sample of benchmarks stars. Specific strategies are implemented to deal with fast rotation, accretion signatures, chromospheric activity, and veiling. The analysis carried out on spectra acquired in young clusters' fields during the first 18 months of observations, up to June 2013, is presented in preparation of the first release of advanced data products. Stellar parameters obtained with the higher resolution and larger wavelength coverage from UVES are reproduced with comparable accuracy and precision using the smaller wavelength range and lower resolution of the GIRAFFE setup adopted for young stars, which allows us to provide with confidence stellar parameters for the much larger GIRAFFE sample. Precisions are estimated to be $\approx$ 120 K r.m.s. in Teff, $\approx$0.3 dex r.m.s. in logg, and $\approx$0.15 dex r.m.s. in [Fe/H], for both the UVES and GIRAFFE setups.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-04-01 |