0000000001034199

AUTHOR

Lawrence Venuti

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Mapping accretion and its variability in the young open cluster NGC 2264: A study based on u-band photometry

2014

We aim at characterizing the accretion properties of several hundred members of the star-forming cluster NGC 2264 (3 Myr). We performed a deep u,g,r,i mapping and a simultaneous u+r monitoring of the region with CFHT/MegaCam in order to directly probe the accretion process from UV excess measurements. Photometric properties and stellar parameters are determined homogeneously for about 750 monitored young objects, spanning the mass range 0.1-2 Mo. About 40% are classical (accreting) T Tauri stars, based on various diagnostics (H_alpha, UV and IR excesses). The remaining non-accreting members define the (photospheric+chromospheric) reference UV emission level over which flux excess is detecte…

Stellar massAstrophysics::High Energy Astrophysical PhenomenaStars: formationPopulationFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsPhotometry (optics)Accretion rateAccretion accretion diskStars: low-maAstrophysics::Solar and Stellar AstrophysicseducationAstrophysics::Galaxy AstrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Physicseducation.field_of_studyDetection thresholdAstronomy and AstrophysicsAstronomy and AstrophysicUltraviolet: starAccretion (astrophysics)T Tauri starAstrophysics - Solar and Stellar Astrophysicsindividual: NGC 2264; Stars: formation; Stars: low-mass; Stars: pre-main sequence; Ultraviolet: stars; Astronomy and Astrophysics; Space and Planetary Science [Accretion accretion disks; Open clusters and associations]Space and Planetary ScienceOpen clusters and associations: individual: NGC 2264Stars: pre-main sequenceAstrophysics::Earth and Planetary AstrophysicsOpen cluster
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