MOA-2006-BLG-074: recognizing xallarap contaminants in planetary microlensing
arXiv:2105.08386 · doi:10.3847/1538-3881/ac0155
Abstract
MOA-2006-BLG-074 was selected as one of the most promising planetary candidates in a retrospective analysis of the MOA collaboration: its asymmetric high-magnification peak can be perfectly explained by a source passing across a central caustic deformed by a small planet. However, after a detailed analysis of the residuals, we have realized that a single lens and a source orbiting with a faint companion provides a more satisfactory explanation for all the observed deviations from a Paczynski curve and the only physically acceptable interpretation. Indeed the orbital motion of the source is constrained enough to allow a very good characterization of the binary source from the microlensing light curve. The case of MOA-2006-BLG-074 suggests that the so-called xallarap effect must be taken seriously in any attempts to obtain accurate planetary demographics from microlensing surveys.
arXiv comment14 pages, 8 figures, accepted by AAS
References in corpus (47)
- Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
- Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000
- The angular size of dwarf stars and subgiants - Surface brightness relations calibrated by interferometry
- The Use of High Magnification Microlensing Events in Discovering Extra-solar Planets
- No large population of unbound or wide-orbit Jupiter-mass planets
- Stellar Multiplicity and the IMF: Most Stars Are Single
- Detecting Earth-Mass Planets with Gravitational Microlensing
- A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192
- Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates
- A Natural Formalism for Microlensing
- Microlensing optical depth towards the Galactic bulge from MOA observations during 2000 with Difference Image Analysis
- A Cold Neptune-Mass Planet OGLE-2007-BLG-368Lb: Cold Neptunes Are Common
- First Observation of Parallax in a Gravitational Microlensing Event
- 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
- IAC-Star: a Code for Synthetic Color-Magnitude Diagram Computation
- Systematic Analysis of 22 Microlensing Parallax Candidates
- Identification of the OGLE-2003-BLG-235/MOA-2003-BLG-53 Planetary Host Star
- Stellar Multiplicity Meets Stellar Evolution And Metallicity: The APOGEE View
- Microlensing with advanced contour integration algorithm: Green's theorem to third order, error control, optimal sampling and limb darkening
- Acceleration and Parallax Effects in Gravitational Microlensing
- An Efficient Method for Modeling High Magnification Planetary Microlensing Events
- VBBinaryLensing: a public package for microlensing light curve computation
- Toward a Galactic Distribution of Planets. I. Methodology & Planet Sensitivities of the 2015 High-Cadence Spitzer Microlens Sample
- Microlensing Discovery of a Tight, Low Mass-ratio Planetary-mass Object around an Old, Field Brown Dwarf
- Einstein Radii from Binary Lensing Events
- Stochastical distributions of lens and source properties for observed galactic microlensing events
- Potential Direct Single-Star Mass Measurement
- A Giant Planet beyond the Snow Line in Microlensing Event OGLE-2011-BLG-0251
- MACHO 96-LMC-2: Lensing of a Binary Source in the LMC and Constraints on the Lensing Object
- MOA-2010-BLG-328Lb: a sub-Neptune orbiting very late M dwarf ?
- OGLE-2005-BLG-153: Microlensing Discovery and Characterization of A Very Low Mass Binary
- OGLE-2012-BLG-0950Lb: The First Planet Mass Measurement from Only Microlens Parallax and Lens Flux
- Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye
- OGLE-2015-BLG-1459L: The Challenges of Exo-Moon Microlensing
- The First Planetary Microlensing Event with Two Microlensed Source Stars
- Planetary microlensing signals from the orbital motion of the source star around the common barycentre
- A possible binary system of a stellar remnant in the high magnification gravitational microlensing event OGLE-2007-BLG-514
- Detection of Exoplanet as a Binary Source of Microlensing Events in WFIRST Survey
- A public code for astrometric microlensing with contour integration
- MOA-bin-29b : A Microlensing Gas Giant Planet Orbiting a Low-mass Host Star
- OGLE-2013-BLG-0911Lb: A Secondary on the Brown-Dwarf Planet Boundary around an M-dwarf
- Revealing Short-period Exoplanets and Brown Dwarfs in the Galactic Bulge using the Microlensing Xallarap Effect with the \textit{Nancy Grace Roman Space Telescope}
- Determining the Physical Lens Parameters of the Binary Gravitational Microlensing Event MOA-2009-BLG-016
- OGLE-2018-BLG-1428Lb: a Jupiter-mass planet beyond the snow line of a dwarf star
- OGLE-2009-BLG-023/MOA-2009-BLG-028: Characterization of a Binary Microlensing Event Based on Survey Data
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- Systematic KMTNet Planetary Anomaly Search. IV. Complete Sample of 2019 Prime-Field
- Systematic KMTNet Planetary Anomaly Search, Paper VII: Complete Sample of Planets from the First Four-Year Survey
- KMT-2022-BLG-0440Lb: A New Microlensing Planet with the Central-Resonant Caustic Degeneracy Broken
- RTModel: a platform for real-time modeling and massive analysis of microlensing events
- Casting Light on Degeneracies: A Comprehensive Study of Lightcurve Variations in Microlensing Events OGLE-2017-BLG-0103 and OGLE-2017-BLG-0192