OGLE-2011-BLG-0265Lb: a Jovian Microlensing Planet Orbiting an M Dwarf

Abstract

We report the discovery of a Jupiter-mass planet orbiting an M-dwarf star that gave rise to the microlensing event OGLE-2011-BLG-0265. Such a system is very rare among known planetary systems and thus the discovery is important for theoretical studies of planetary formation and evolution. High-cadence temporal coverage of the planetary signal combined with extended observations throughout the event allows us to accurately model the observed light curve. The final microlensing solution remains, however, degenerate yielding two possible configurations of the planet and the host star. In the case of the preferred solution, the mass of the planet is $M_{\mathrm{p}}=0.9\pm 0.3M_{\mathrm{J}}$, and the planet is orbiting a star with a mass $M=0.22\pm 0.06M_{\odot }$. The second possible configuration (2$\sigma$ away) consists of a planet with $M_{\mathrm{p}}=0.6\pm 0.3M_{\mathrm{J}}$ and host star with $M=0.14\pm 0.06M_{\odot }$. The system is located in the Galactic disk 3 -- 4 kpc towards the Galactic bulge. In both cases, with an orbit size of 1.5 -- 2.0 AU, the planet is a "cold Jupiter" -- located well beyond the "snow line" of the host star. Currently available data make the secure selection of the correct solution difficult, but there are prospects for lifting the degeneracy with additional follow-up observations in the future, when the lens and source star separate.

arXiv comment10 pages, 2 tables, 5 figures. Accepted in ApJ

References in corpus (50)

• A method for optimal image subtraction
• A super-Earth transiting a nearby low-mass star
• Discovery of a Cool Planet of 5.5 Earth Masses Through Gravitational Microlensing
• Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
• One or more bound planets per Milky Way star from microlensing observations
• Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000
• Unbound or Distant Planetary Mass Population Detected by Gravitational Microlensing
• Towards a deterministic model of planetary formation. III. Mass distribution of short-period planets around stars of various masses
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. V. Evidence for a wide age distribution and a complex MDF
• The angular size of dwarf stars and subgiants - Surface brightness relations calibrated by interferometry
• Core-Accretion Model Predicts Few Jovian-Mass Planets Orbiting Red Dwarfs
• OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens
• Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
• Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008
• Microlens OGLE-2005-BLG-169 Implies Cool Neptune-Like Planets are Common
• Detecting Earth-Mass Planets with Gravitational Microlensing
• A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071
• A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192
• A Planetary Companion to the Nearby M4 Dwarf, Gliese 876
• Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
• The Split Red Clump of the Galactic Bulge from OGLE-III
• A Cold Neptune-Mass Planet OGLE-2007-BLG-368Lb: Cold Neptunes Are Common
• A New Algorithm For Difference Image Analysis
• Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. IV. Two bulge populations
• OGLE-2005-BLG-071Lb, the Most Massive M-Dwarf Planetary Companion?
• Binary microlensing event OGLE-2009-BLG-020 gives a verifiable mass, distance and orbit predictions
• MOA-2009-BLG-387Lb: A massive planet orbiting an M dwarf
• Discovering Galactic Planets by Gravitational Microlensing: Magnification Patterns and Light Curves
• Detection of Rotation in a Binary Microlens: PLANET Photometry of MACHO 97-BLG-41
• Planetary Detection Efficiency of the Magnification 3000 Microlensing Event OGLE-2004-BLG-343
• The TRENDS High-Contrast Imaging Survey. IV. The Occurrence Rate of Giant Planets around M-Dwarfs
• Masses and Orbital Constraints for the OGLE-2006-BLG-109Lb,c Jupiter/Saturn Analog Planetary System
• Rapid Formation of Gas Giant Planets around M Dwarf Stars
• Extended-Source Effect and Chromaticity in Two-Point-Mass Microlensing
• Hexadecapole Approximation in Planetary Microlensing
• RoboNet-II: Follow-up observations of microlensing events with a robotic network of telescopes
• A frozen super-Earth orbiting a star at the bottom of the Main Sequence
• Second-generation microlensing planet surveys: a realistic simulation
• MOA-2011-BLG-322Lb: a "second generation survey" microlensing planet
• Microlensing limits on numbers and orbits of extra-solar planets from the 1998-2000 OGLE events
• The angular sizes of dwarf stars and subgiants - Non-linear surface brightness relations in BVRcIc from interferometry
• MOA-2010-BLG-073L: An M-Dwarf with a Substellar Companion at the Planet/Brown Dwarf Boundary
• A short-period super-Earth orbiting the M2.5 dwarf GJ3634. Detection with Harps velocimetry and transit search with Spitzer photometry
• A Giant Planet beyond the Snow Line in Microlensing Event OGLE-2011-BLG-0251
• Detectability of Orbital Motion in Stellar Binary and Planetary Microlenses
• OGLE-2005-BLG-018: Characterization of Full Physical and Orbital Parameters of a Gravitational Binary Lens
• A Super-Jupiter orbiting a late-type star: A refined analysis of microlensing event OGLE-2012-BLG-0406
• Super-massive planets around late-type stars - the case of OGLE-2012-BLG-0406Lb
• Gravitational Binary-lens Events with Prominent Effects of Lens Orbital Motion
• General Complex Polynomial Root Solver and Its Further Optimization for Binary Microlenses

Cited by in corpus (25)

• The Exoplanet Mass-Ratio Function from the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
• OGLE-IV: Fourth Phase of the Optical Gravitational Lensing Experiment
• The frequency of snowline-region planets from four-years of OGLE-MOA-Wise second-generation microlensing
• OGLE-2017-BLG-1522: A giant planet around a brown dwarf located in the Galactic bulge
• Close stellar conjunctions of alpha Centauri A and B until 2050 - An mK = 7.8 star may enter the Einstein ring of alpha Cen A in 2028
• Is the Galactic bulge devoid of planets?
• Mid-to-Late M Dwarfs Lack Jupiter Analogs
• OGLE-2015-BLG-1482L: the first isolated low-mass microlens in the Galactic bulge
• OGLE-2012-BLG-0950Lb: The First Planet Mass Measurement from Only Microlens Parallax and Lens Flux
• MOA 2011-BLG-028Lb: a Neptune-mass Microlensing Planet in the Galactic Bulge
• OGLE-2017-BLG-0406: $Spitzer$ Microlens Parallax Reveals Saturn-mass Planet orbiting M-dwarf Host in the Inner Galactic Disk
• Using LSST Microlensing to Constrain Dark Compact Objects in Spherical and Disk Configurations
• MOA-bin-29b : A Microlensing Gas Giant Planet Orbiting a Low-mass Host Star
• Microlens mass determination for Gaia's predicted photometric events
• OGLE-2018-BLG-0022: A Nearby M-dwarf Binary
• Parallax and orbital effects in astrometric microlensing with binary sources
• Astrometric microlensing
• MOA Data Reveal a New Mass, Distance, and Relative Proper Motion for Planetary System OGLE-2015-BLG-0954L
• OGLE-2013-BLG-0132Lb and OGLE-2013-BLG-1721Lb: Two Saturn-mass Planets Discovered around M-dwarfs
• Reconciling the predictions of microlensing analysis with radial velocity measurements for OGLE-2011-BLG-0417
• An analysis of binary microlensing event OGLE-2015-BLG-0060
• A Candidate High-Velocity Exoplanet System in the Galactic Bulge
• Properties of microlensing events by wide separation planets with a moon
• Frequency Shift in Binary Lensing System
• Eclipsing negative-parity image of gravitational microlensing by a giant-lens star