0000000000936850

AUTHOR

F. V. Hessman

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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Inferring statistics of planet populations by means of automated microlensing searches

2008

(abridged) The study of other worlds is key to understanding our own, and not only provides clues to the origin of our civilization, but also looks into its future. Rather than in identifying nearby systems and learning about their individual properties, the main value of the technique of gravitational microlensing is in obtaining the statistics of planetary populations within the Milky Way and beyond. Only the complementarity of different techniques currently employed promises to yield a complete picture of planet formation that has sufficient predictive power to let us understand how habitable worlds like ours evolve, and how abundant such systems are in the Universe. A cooperative three-…

Astrophysics (astro-ph)FOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysicsAstrophysics::Galaxy Astrophysics
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