Author: E. Bertin

0000000000794380

AUTHOR

E. Bertin

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A brown dwarf orbiting an M-dwarf:MOA 2009-BLG-411L

2012

Context. Caustic crossing is the clearest signature of binary lenses in microlensing. In the present context, this signature is diluted by the large source star but a detailed analysis has allowed the companion signal to be extracted.Aims. MOA 2009-BLG-411 was detected on August 5, 2009 by the MOA-Collaboration. Alerted as a high-magnification event, it was sensitive to planets. Suspected anomalies in the light curve were not confirmed by a real-time model, but further analysis revealed small deviations from a single lens extended source fit.Methods. Thanks to observations by all the collaborations, this event was well monitored. We first decided to characterize the source star properties b…

Brown dwarfContext (language use)Astrophysicsgravitational lensing: microAstrophysics::Cosmology and Extragalactic AstrophysicsGravitational microlensing01 natural sciencesSettore FIS/05 - Astronomia e AstrofisicaPlanet0103 physical sciencesAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysicsstars: individual: MOA 2009-BLG-411L010308 nuclear & particles physicsAstronomyMOA 2009-BLG-411L; gravitational lensing; starsAstronomy and AstrophysicsRadiusLight curveGalaxyGravitational lensbinaries: generalSpace and Planetary ScienceAstrophysics::Earth and Planetary Astrophysicsbinaries: general; gravitational lensing: micro; stars: individual: MOA 2009-BLG-411L

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PEPhysical Sciences and Engineering
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