First Space-based Microlens Parallax Measurement of an Isolated Star: Spitzer Observations of OGLE-2014-BLG-0939
arXiv:1410.5429 · doi:10.1088/0004-637X/802/2/76
Abstract
We present the first space-based microlens parallax measurement of an isolated star. From the striking differences in the lightcurve as seen from Earth and from Spitzer (~1 AU to the West), we infer a projected velocity v_helio,projected ~ 250 km/s, which strongly favors a lens in the Galactic Disk with mass M=0.23 +- 0.07 M_sun and distance D_L=3.1 +- 0.4 kpc. An ensemble of such measurements drawn from our ongoing program could be used to measure the single-lens mass function including dark objects, and also is necessary for measuring the Galactic distribution of planets since the ensemble reflects the underlying Galactic distribution of microlenses. We study the application of the many ideas to break the four-fold degeneracy first predicted by Refsdal 50 years ago. We find that this degeneracy is clearly broken, but by two unanticipated mechanisms.
arXiv comment26 pages, 3 figures, submitted to ApJ
References in corpus (25)
- Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008
- A Natural Formalism for Microlensing
- Resolution of the MACHO-LMC-5 Puzzle: The Jerk-Parallax Microlens Degeneracy
- MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections
- First Observation of Parallax in a Gravitational Microlensing Event
- Binary microlensing event OGLE-2009-BLG-020 gives a verifiable mass, distance and orbit predictions
- The Mass Spectrum Of Machos From Parallax Measurements
- The Extreme Microlensing Event OGLE-2007-BLG-224: Terrestrial Parallax Observation of a Thick-Disk Brown Dwarf
- Spitzer as Microlens Parallax Satellite: Mass Measurement for the OGLE-2014-BLG-0124L Planet and its Host Star
- Measuring the Remnant Mass Function of the Galactic Bulge
- Systematic Analysis of 22 Microlensing Parallax Candidates
- First Space-Based Microlens Parallax Measurement: Spitzer Observations of OGLE-2005-SMC-001
- MOA-2011-BLG-293Lb: First Microlensing Planet possibly in the Habitable Zone
- Macho Parallaxes From A Single Satellite
- Kepler-like Multi-Plexing for Mass Production of Microlens Parallaxes
- Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Star
- Microlens Terrestrial Parallax Mass Measurements: A Rare Probe of Isolated Brown Dwarfs and Free-Floating Planets
- Monte Carlo Simulations of Macho Parallaxes From a Satellite
- Satellite Parallaxes of Lensing Events Towards the Galactic Bulge
- Geosynchronous Microlens Parallaxes
- Microlens Parallaxes with SIRTF
- Photon Statistics Limits for Earth-Based Parallax Measurements of MACHO Events
- Microlens Masses from 1-D Parallaxes and Heliocentric Proper Motions
- Cheap Space-Based Microlens Parallaxes for High-Magnification Events
- MACHO Mass Determination Based on Space Telescope Observation
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- Pathway to the Galactic Distribution of Planets: Combined Spitzer and Ground-Based Microlens Parallax Measurements of 21 Single-Lens Events
- Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey II: Free-Floating Planet Detection Rates
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- Campaign 9 of the Mission: Observational Parameters, Scientific Drivers, and Community Involvement for a Simultaneous Space- and Ground-based Microlensing Survey
- A Search for Stellar-Mass Black Holes via Astrometric Microlensing
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- Spitzer as Microlens Parallax Satellite: Mass and Distance Measurements of Binary Lens System OGLE-2014-BLG-1050L
- Microlensing Searches for Exoplanets
- Spitzer Microlens Measurement of a Massive Remnant in a Well-Separated Binary
- OGLE-2015-BLG-1482L: the first isolated low-mass microlens in the Galactic bulge
- OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary
- 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
- Planet Sensitivity from Combined Ground- and Space-based Microlensing Observations
- Combining Spitzer parallax and Keck II adaptive optics imaging to measure the mass of a solar-like star orbited by a cold gaseous planet discovered by microlensing
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- On the Feasibility of Characterizing Free-floating Planets with Current and Future Space-based Microlensing Surveys
- Measurement of Source Star Colors with the K2C9-CFHT Multi-color Microlensing Survey
- OGLE-2017-BLG-0406: Microlens Parallax Reveals Saturn-mass Planet orbiting M-dwarf Host in the Inner Galactic Disk
- OGLE-2017-BLG-1186: first application of asteroseismology and Gaussian processes to microlensing
- OGLE-2016-BLG-0168 Binary Microlensing Event: Prediction and Confirmation of the Micorlens Parallax Effect from Space-based Observation
- Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M-dwarf
- A Reanalysis of Public Galactic Bulge Gravitational Microlensing Events from OGLE-III and IV
- Predictions for the Detection and Characterization of a Population of Free-Floating Planets with K2 Campaign 9
- OGLE-2015-BLG-0196: Ground-based Gravitational Microlens Parallax Confirmed By Space-Based Observation
- Spitzer Microlensing parallax reveals two isolated stars in the Galactic bulge
- OGLE-2016-BLG-1045: A Test of Cheap Space-Based Microlens Parallaxes
- Microlensing Parallax for Observers in Heliocentric Motion
- Two Jupiter-Mass Planets Discovered by the KMTNet Survey in 2017
- Space-based Microlens Parallax Observation As a Way to Resolve the Severe Degeneracy between Microlens-parallax and Lens-orbital Effect
- OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected From Spitzer Only
- Photometry of K2 Campaign 9 bulge data
- Ground-based parallax confirmed by Spitzer: binary microlensing event MOA-2015-BLG-020
- Pixel Level Decorrelation in Service of the \textit{Spitzer} Microlens Parallax Survey
- OGLE-2018-BLG-0799Lb: a Planet with Spitzer Parallax
- OGLE-2014-BLG-1112LB: A Microlensing Brown Dwarf Detected Through the Channel of a Gravitational Binary-Lens Event
- Faint source star planetary microlensing: the discovery of the cold gas giant planet OGLE-2014-BLG-0676Lb
- OGLE-2017-BLG-0329L: A Microlensing Binary Characterized with Dramatically Enhanced Precision Using Data from Space-based Observations
- MOA-2019-BLG-008Lb: a new microlensing detection of an object at the planet/brown dwarf boundary
- VVV survey microlensing: candidate events with source in the far disk
- AT2021uey: A planetary microlensing event outside the Galactic bulge
- Constraining Lens Masses in Moderately to Highly Magnified Microlensing Events from Gaia
- Gaia20fnr: A binary-lens microlensing event with full orbital motion revealed by four space telescopes