Search results for "Stars: luminosity function"

showing 2 items of 2 documents

The Gaia-ESO Survey: membership and initial mass function of the. Velorum cluster

2016

Understanding the properties of young open clusters, such as the Initial Mass Function (IMF), star formation history and dynamic evolution, is crucial to obtain reliable theoretical predictions of the mechanisms involved in the star formation process. We want to obtain a list, as complete as possible, of confirmed members of the young open cluster Gamma Velorum, with the aim of deriving general cluster properties such as the IMF. We used all available spectroscopic membership indicators within the Gaia-ESO public archive together with literature photometry and X-ray data and, for each method, we derived the most complete list of candidate cluster members. Then, we considered photometry, gra…

Initial mass functionStars: luminosity function mass functionStars: formationFOS: Physical sciencesTechniques: spectroscopicOpen clusters and associations: individual: γVelorum; Stars: formation; Stars: luminosity function mass function; Stars: pre-main sequence; Techniques: radial velocities; Techniques: spectroscopic; Astronomy and Astrophysics; Space and Planetary ScienceAstrophysicsStars: luminosity function01 natural sciencesstars: pre-main sequence / open clusters and associations: individual: γVelorum / stars: formation / stars: luminosity functionPhotometry (optics)stars: pre-main sequence / open clusters and associations: individual: γVelorum / stars: formation / stars: luminosity function mass function / techniques: radial velocities / techniques: spectroscopic0103 physical sciences010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Open clusters and associations: individual: γVelorumQCQBPhysics010308 nuclear & particles physicsStar formationTechniques: radial velocitieAstronomy and Astrophysicsmass function / techniques: radial velocities / techniques: spectroscopicAstronomy and AstrophysicAstrophysics - Astrophysics of GalaxiesAstrophysics - Solar and Stellar AstrophysicsYoung populationmass functionSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Techniques: radial velocitiesopen clusters and associations: individual: gamma VelorumStars: pre-main sequenceOpen cluster
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Optical spectroscopy of X-ray sources in the Taurus molecular cloud: discovery of ten new pre-main sequence stars

2008

We have analyzed optical spectra of 25 X-ray sources identified as potential new members of the Taurus molecular cloud (TMC), in order to confirm their membership in this SFR. Fifty-seven candidates were previously selected among the X-ray sources in the XEST survey, having a 2MASS counterpart compatible with a PMS star based on color-magnitude and color-color diagrams. We obtained high-resolution optical spectra for 7 of these candidates with the SARG spectrograph at the TNG telescope, which were used to search for Li absorption and to measure the Ha line and the radial and rotational velocities; 18 low-resolution optical spectra obtained with DOLORES for other candidate members were used …

Physicstechniques: spectroscopic stars: luminosity function mass function stars: pre-main sequence Galaxy: open clusters and associations: individual: Taurus molecular cloudMolecular cloudAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsStellar classificationSurface gravityAstrophysicsSpectral lineStarsSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceAstrophysics::Solar and Stellar AstrophysicsEmission spectrumMain sequenceAstrophysics::Galaxy AstrophysicsLine (formation)
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