0000000000936892

AUTHOR

N. Rattenbury

showing 2 related works from this author

A giant planet beyond the snow line in microlensing event OGLE-2011-BLG-0251

2013

We present the analysis of the gravitational microlensing event OGLE-2011-BLG-0251. This anomalous event was observed by several survey and follow-up collaborations conducting microlensing observations towards the Galactic Bulge. Based on detailed modelling of the observed light curve, we find that the lens is composed of two masses with a mass ratio q=1.9 x 10^-3. Thanks to our detection of higher-order effects on the light curve due to the Earth's orbital motion and the finite size of source, we are able to measure the mass and distance to the lens unambiguously. We find that the lens is made up of a planet of mass 0.53 +- 0.21,M_Jup orbiting an M dwarf host star with a mass of 0.26 +- 0.…

planets and satellites: detection010504 meteorology & atmospheric sciencesSatellitesbulge [Galaxy]FOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsDiscoveryGravitational microlensing01 natural sciencesGalaxy: bulgeEinstein radiusLensgravitational lensing: weakSettore FIS/05 - Astronomia e AstrofisicaPlanetSnow0103 physical sciencesgravitational lensing; weak; planets and satellites; detection; planetary systems; Galaxy; bulgegravitational lensing: weak; planets and satellites: detection; planetary systems; Galaxy: bulgeBinaryQB Astronomy010303 astronomy & astrophysicsplanetary systemsAstrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesQBPhysicsEarth and Planetary Astrophysics (astro-ph.EP)Giant planetSystemsSearchAstronomy and AstrophysicsRadiusFrequencyPlanetary systemMass ratioMassLight curveStarsAlgorithmdetection [Planets and satellites]Planetary systemsSpace and Planetary ScienceDwarfAstrophysics::Earth and Planetary Astrophysicsweak [Gravitational lensing]Astrophysics - Earth and Planetary AstrophysicsAstronomy and Astrophysics
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Characterizing Lenses and Lensed Stars of High-magnification Single-lens Gravitational Microlensing Events with Lenses Passing over Source Stars

2012

We present the analysis of the light curves of 9 high-magnification single-lens gravitational microlensing events with lenses passing over source stars, including OGLE-2004-BLG-254, MOA-2007-BLG-176, MOA-2007-BLG-233/OGLE-2007-BLG-302, MOA-2009-BLG-174, MOA-2010-BLG-436, MOA-2011-BLG-093, MOA-2011-BLG-274, OGLE-2011-BLG-0990/MOA-2011-BLG-300, and OGLE-2011-BLG-1101/MOA-2011-BLG-325. For all events, we measure the linear limb-darkening coefficients of the surface brightness profile of source stars by measuring the deviation of the light curves near the peak affected by the finite-source effect. For 7 events, we measure the Einstein radii and the lens-source relative proper motions. Among the…

Physics010308 nuclear & particles physicsBrown dwarfFOS: Physical sciencesAstronomy and Astrophysicsgravitational lensing: microAstrophysicsMass ratioLight curveGravitational microlensing01 natural sciencesGalaxy: bulgeGalaxy: bulge gravitational lensing: microEinstein radiuslaw.inventionLens (optics)StarsAstrophysics - Solar and Stellar AstrophysicsSettore FIS/05 - Astronomia e AstrofisicaSpace and Planetary Sciencelaw0103 physical sciencesSurface brightness010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)
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