Systematic KMTNet Planetary Anomaly Search. XII. Complete Sample of 2017 Subprime Field Planets

Abstract

We report the analysis of four unambiguous planets and one possible planet from the subprime fields ($\Gamma \le 1{\mathrm{hr}}^{-1}$) of the 2017 Korea Microlensing Telescope Network (KMTNet) microlensing survey, to complete the KMTNet AnomalyFinder planetary sample for the 2017 subprime fields. They are KMT-2017-BLG-0849, KMT-2017-BLG-1057, OGLE-2017-BLG-0364, and KMT-2017-BLG-2331 (unambiguous), as well as KMT-2017-BLG-0958 (possible). For the four unambiguous planets, the mean planet-host mass ratios, $q$, are $(1.0,1.2,4.6,13)\times 10^{-4}$, the median planetary masses are $(6.4,24,76,171)M_{\oplus }$ and the median host masses are $(0.19,0.57,0.49,0.40)M_{\odot }$ from a Bayesian analysis. We have completed the AnomalyFinder planetary sample from the first 4-year KMTNet data (2016--2019), with 112 unambiguous planets in total, which nearly tripled the microlensing planetary sample. The ``sub-Saturn desert'' ($\log q=\left[-3.6,-3.0\right]$) found in the 2018 and 2019 KMTNet samples is confirmed by the 2016 and 2017 KMTNet samples.

Published in AJ

References in corpus (64)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• emcee: The MCMC Hammer
• A method for optimal image subtraction
• Towards a Deterministic Model of Planetary Formation I: a Desert in the Mass and Semi Major Axis Distributions of Extra Solar Planets
• 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
• Extrasolar planet population synthesis I: Method, formation tracks and mass-distance distribution
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• 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
• OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens
• Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008
• 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
• The Exoplanet Mass-Ratio Function from the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
• Expanding the Realm of Microlensing Surveys with Difference Image Photometry
• A Natural Formalism for Microlensing
• Difference imaging photometry of blended gravitational microlensing events with a numerical kernel
• Resolution of the MACHO-LMC-5 Puzzle: The Jerk-Parallax Microlens Degeneracy
• The Luminosity Function and Mass Function in the Galactic Bulge
• MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections
• 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
• Finite Source Sizes and the Information Content of MACHO-Type Lens Search Light Curves
• Planet Parameters in Microlensing Events
• Systematic Analysis of 22 Microlensing Parallax Candidates
• Korea Microlensing Telescope Network Microlensing Events from 2015: Event-Finding Algorithm, Vetting, and Photometry
• Microlensing with advanced contour integration algorithm: Green's theorem to third order, error control, optimal sampling and limb darkening
• The frequency of snowline-region planets from four-years of OGLE-MOA-Wise second-generation microlensing
• The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
• A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary
• Astrophysical Applications of Gravitational Microlensing
• Theory of Pixel Lensing
• Triple Microlens OGLE-2008-BLG-092L: Binary Stellar System with a Circumprimary Uranus-type Planet
• VBBinaryLensing: a public package for microlensing light curve computation
• OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star
• Predicting Stellar Angular Diameters from $V$, $I_C$, $H$, $K$ Photometry
• MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy
• Systematic KMTNet Planetary Anomaly Search, Paper I: OGLE-2019-BLG-1053Lb, A Buried Terrestrial Planet
• Interpretation of a Short-Term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486
• Systematic KMTNet Planetary Anomaly Search, Paper II: Six New $q<2\times 10^{-4}$ Mass-ratio Planets
• Systematic Reanalysis of KMTNet microlensing events, Paper I: Updates of the Photometry Pipeline and a New Planet Candidate
• Systematic KMTNet Planetary Anomaly Search. V. Complete Sample of 2018 Prime-Field
• Systematic KMTNet Planetary Anomaly Search. IV. Complete Sample of 2019 Prime-Field
• OGLE-2017-BLG-0173Lb: Low Mass-Ratio Planet in a "Hollywood" Microlensing Event
• $Spitzer$ Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-Rotating Low-Mass Brown Dwarf
• Systematic KMTNet Planetary Anomaly Search, Paper VII: Complete Sample of $q<10^{-4}$ Planets from the First Four-Year Survey
• Systematic KMTNet Planetary Anomaly Search. VIII. Complete Sample of 2019 Subprime Field Planets
• Systematic KMTNet Planetary Anomaly Search, Paper III: One Wide-Orbit Planet And Two Stellar Binaries
• MOA-2013-BLG-220Lb: Massive Planetary Companion to Galactic-Disk Host
• Microlensing Predictions: Impact of Galactic Disc Dynamical Models
• The 2L1S/1L2S Degeneracy for Two Microlensing Planet Candidates Discovered by the KMTNet Survey in 2017
• OGLE-2019-BLG-1470LABc: Another Microlensing Giant Planet in a Binary System?
• Spitzer Opens New Path to Break Classic Degeneracy for Jupiter-Mass Microlensing Planet OGLE-2017-BLG-1140Lb
• OGLE-2015-BLG-1670Lb: A Cold Neptune beyond the Snow Line in the Provisional WFIRST Microlensing Survey Field
• Two Jupiter-Mass Planets Discovered by the KMTNet Survey in 2017
• Four sub-Jovian-mass planets detected by high-cadence microlensing surveys
• Candidate Brown-dwarf Microlensing Events with Very Short Timescales and Small Angular Einstein Radii
• OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected From Spitzer Only
• MOA Data Reveal a New Mass, Distance, and Relative Proper Motion for Planetary System OGLE-2015-BLG-0954L
• KMT-2016-BLG-1836Lb: A Super-Jovian Planet From A High-Cadence Microlensing Field
• OGLE-2018-BLG-0799Lb: a $q\sim 2.7\times 10^{-3}$ Planet with Spitzer Parallax

Cited by in corpus (2)

• The Brown-dwarf Desert Persists as a Mass-ratio Desert around Low-mass Stars
• Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function