Systematic KMTNet Planetary Anomaly Search. IV. Complete Sample of 2019 Prime-Field

Abstract

We report the complete statistical planetary sample from the prime fields ($\Gamma \ge 2{\mathrm{hr}}^{-1}$) of the 2019 Korea Microlensing Telescope Network (KMTNet) microlensing survey. We develop the optimized KMTNet AnomalyFinder algorithm and apply it to the 2019 KMTNet prime fields. We find a total of 14 homogeneously selected planets and report the analysis of three planetary events, KMT-2019-BLG-(1042,1552,2974). The planet-host mass ratios, $q$, for the three planetary events are $6.34\times 10^{-4},4.89\times 10^{-3}$ and $6.18\times 10^{-4}$, respectively. A Bayesian analysis indicates the three planets are all cold giant planets beyond the snow line of their host stars. The 13 planets are basically uniform in $\log q$ over the range $-5.0<\log q<-1.5$. This result suggests that the planets below $q_{\mathrm{break}}=1.7\times 10^{-4}$ proposed by the MOA-II survey may be more common than previously believed. This work is an early component of a large project to determine the KMTNet mass-ratio function, and the whole sample of 2016--2019 KMTNet events should contain about 120 planets.

Accepted by MNRAS

References in corpus (14)

• One or more bound planets per Milky Way star from microlensing observations
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• 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
• MOA-cam3: a wide-field mosaic CCD camera for a gravitational microlensing survey in New Zealand
• Optimal Survey Strategies and Predicted Planet Yields for the Korean Microlensing Telescope Network
• Predicting Stellar Angular Diameters from $V$, $I_C$, $H$, $K$ Photometry
• OGLE-2012-BLG-0950Lb: The First Planet Mass Measurement from Only Microlens Parallax and Lens Flux
• Systematic KMTNet Planetary Anomaly Search, Paper III: One Wide-Orbit Planet And Two Stellar Binaries
• Binary Source Microlensing Event OGLE-2016-BLG-0733: Interpretation of A Long-term Asymmetric Perturbation
• OGLE-2016-BLG-0596Lb: High-Mass Planet From High-Magnification Pure-Survey Microlensing Event
• MOA-2006-BLG-074: recognizing xallarap contaminants in planetary microlensing
• OGLE-2018-BLG-1269Lb: A Jovian Planet With A Bright, $I=16$ Host
• New Giant Planet beyond the Snow Line for an Extended MOA Exoplanet Microlens Sample

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• Systematic KMTNet Planetary Anomaly Search, Paper VII: Complete Sample of $q<10^{-4}$ Planets from the First Four-Year Survey
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• A Mathematical Treatment of the Offset Microlensing Degeneracy
• KMT-2022-BLG-0440Lb: A New $q<10^{-4}$ Microlensing Planet with the Central-Resonant Caustic Degeneracy Broken
• Systematic Reanalysis of KMTNet Microlensing Events, Paper II: Two New Planets in Giant-Source Events
• Mass Production of 2021 KMTNet Microlensing Planets III: Analysis of Three Giant Planets
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• KMT-2017-BLG-0673Lb and KMT-2019-BLG-0414Lb: Two microlensing planets detected in peripheral fields of KMTNet survey
• Exoplanet Occurrence Rates from Microlensing Surveys
• Mass Production of 2021 KMTNet Microlensing Planets II
• MAGIC: Microlensing Analysis Guided by Intelligent Computation
• KMT-2025-BLG-1616Lb: First Microlensing Bound Planet From DREAMS
• The Brown-dwarf Desert Persists as a Mass-ratio Desert around Low-mass Stars
• OGLE-2015-BLG-1609Lb: Sub-jovian planet orbiting a low-mass stellar or brown dwarf host
• Simulations of Triple Microlensing Events I: Detectability of a scaled Sun-Jupiter-Saturn System
• MOA-2020-BLG-135Lb: A New Neptune-class Planet for the Extended MOA-II Exoplanet Microlens Statistical Analysis