0000000000523979

AUTHOR

Andrew Gould

showing 3 related works from this author

MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections

2012

Because of the development of large-format, wide-field cameras, microlensing surveys are now able to monitor millions of stars with sufficient cadence to detect planets. These new discoveries will span the full range of significance levels including planetary signals too small to be distinguished from the noise. At present, we do not understand where the threshold is for detecting planets. MOA-2011-BLG-293Lb is the first planet to be published from the new surveys, and it also has substantial followup observations. This planet is robustly detected in survey+followup data (Delta chi^2 ~ 5400). The planet/host mass ratio is q=5.3+/- 0.2*10^{-3}. The best fit projected separation is s=0.548+/-…

PhysicsEarth and Planetary Astrophysics (astro-ph.EP)010308 nuclear & particles physicsAstronomyFOS: Physical sciencesAstronomy and AstrophysicsGravitational microlensing01 natural sciencesTest (assessment)Graduate researchStarsSpace and Planetary SciencePlanet0103 physical sciences010303 astronomy & astrophysicsAstrophysics - Earth and Planetary Astrophysics
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SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems

2011

Building on the legacy of the Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program of four spectroscopic surveys on three scientific themes: dark energy and cosmological parameters, the history and structure of the Milky Way, and the population of giant planets around other stars. In keeping with SDSS tradition, SDSS-III will provide regular public releases of all its data, beginning with SDSS DR8 (which occurred in Jan 2011). This paper presents an overview of the four SDSS-III surveys. BOSS will measure redshifts of 1.5 million massive galaxies and Lya forest spectra of 150,000 quasars, using the BAO feature of large scale structure to obtain percent-level determinations of the…

Astrofísicaplanets and satellites: detection[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]Milky WayFOS: Physical sciencesEspectros astronômicosAstrophysics::Cosmology and Extragalactic AstrophysicsSurveys01 natural sciencesevolution [Galaxy]Movimento estelarsurveysPlanetBulge0103 physical sciencesPhysical Sciences and MathematicsAstrophysics::Solar and Stellar AstrophysicsMatéria escuraobservations [Cosmology]Instrumentation and Methods for Astrophysics (astro-ph.IM)Tecnicas astronomicas010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsMapeamentos astronômicosAglomerados de galaxiasPlanetas extrasolaresPhysicsGalaxy: evolutionCosmologia010308 nuclear & particles physicsGiant planetAstrophysics::Instrumentation and Methods for AstrophysicsFísicaAstronomyAstronomy and AstrophysicsQuasarComposicao estelarPlanetary systemEspectros estelaresRedshiftGalaxy[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]detection [Planets and satellites]Space and Planetary Sciencecosmology: observationsAstrophysics::Earth and Planetary AstrophysicsAstrophysics - Instrumentation and Methods for Astrophysics
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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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