0000000000320514

AUTHOR

J. F. Gameiro

showing 2 related works from this author

Gaia -ESO Survey: Analysis of pre-main sequence stellar spectra

2015

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 strategi…

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 analysi
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The Gaia-ESO Survey: Chromospheric emission, accretion properties, and rotation in gamma Velorum and Chamaeleon

2015

Aims: One of the goals of the Gaia-ESO Survey (GES), which is conducted with FLAMES at the VLT, is the census and the characterization of the low-mass members of very young clusters and associations. We conduct a comparative study of the main properties of the sources belonging to γ Velorum (γ Vel) and Chamaeleon I (Cha I) young associations, focusing on their rotation, chromospheric radiative losses, and accretion. Methods: We used the fundamental parameters (effective temperature, surface gravity, lithium abundance, and radial velocity) delivered by the GES consortium in the first internal data release to select the members of γ Vel and Cha I among the UVES and GIRAFFE spectroscopic obser…

Astrofísicastars: chromospheresAstrophysics::High Energy Astrophysical PhenomenaAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsRotationStars: chromosphereOpen clusters and associations: individual:γVelorumstars: low-massStars: low-maAstrophysics::Solar and Stellar AstrophysicsOpen clusters and associations: individual: Chamaeleon Iopen clusters and associations: individual: γ VelorumQCAstrophysics::Galaxy AstrophysicsQBLine (formation)PhysicsAccretion (meteorology)stars: chromospheres ; stars: low-mass; open clusters and associations: individual: γ VelorumDiagramStars: rotationSpectral densityAstronomy and AstrophysicsAstronomy and AstrophysicStarsDistribution (mathematics)Astrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceChamaeleonStars: pre-main sequenceAstrophysics::Earth and Planetary AstrophysicsOpen clusters and associations: individual: Chamaeleon I; Open clusters and associations: individual:γVelorum; Stars: chromospheres; Stars: low-mass; Stars: pre-main sequence; Stars: rotation
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