Systematic KMTNet Planetary Anomaly Search. V. Complete Sample of 2018 Prime-Field

Abstract

We complete the analysis of all 2018 prime-field microlensing planets identified by the KMTNet AnomalyFinder. Among the 10 previously unpublished events with clear planetary solutions, 8 are either unambiguously planetary or are very likely to be planetary in nature: OGLE-2018-BLG-1126, KMT-2018-BLG-2004, OGLE-2018-BLG-1647, OGLE-2018-BLG-1367, OGLE-2018-BLG-1544, OGLE-2018-BLG-0932, OGLE-2018-BLG-1212, and KMT-2018-BLG-2718. Combined with the 4 previously published new AnomalyFinder events and 12 previously published (or in preparation) planets that were discovered by eye, thismakes a total of 24 2018 prime-field planets discovered or recovered by AnomalyFinder. Together with a paper in preparation on 2018 sub-prime planets, this work lays the basis for the first statistical analysis of the planet mass-ratio function based on planets identified in KMTNet data. By systematically applying the heuristic analysis of Hwang et al. (2022) to each event, we identify the small modification in their formalism that is needed to unify the so-called close/wide and inner/outer degeneracies, as conjectured by

22 pages, 14 tables, 15 figures

References in corpus (11)

• One or more bound planets per Milky Way star from microlensing observations
• The UKIRT Wide Field Camera ZYJHK Photometric System: Calibration from 2MASS
• The Exoplanet Mass-Ratio Function from the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
• A Characteristic Planetary Feature in Double-Peaked, High-Magnification Microlensing Events
• Systematic KMTNet Planetary Anomaly Search. IV. Complete Sample of 2019 Prime-Field
• UKIRT microlensing surveys as a pathfinder for $WFIRST$: The detection of five highly extinguished low-$|b|$ events
• OGLE-2017-BLG-0173Lb: Low Mass-Ratio Planet in a "Hollywood" Microlensing Event
• OGLE-2015-BLG-0479LA,B: Binary Gravitational Microlens Characterized by Simultaneous Ground-based and Space-based Observation
• Systematic KMTNet Planetary Anomaly Search, Paper III: One Wide-Orbit Planet And Two Stellar Binaries
• $Spitzer$ Parallax of OGLE-2018-BLG-0596: A Low-mass-ratio Planet around an M-dwarf
• OGLE-2018-BLG-1269Lb: A Jovian Planet With A Bright, $I=16$ Host

Cited by in corpus (19)

• Systematic KMTNet Planetary Anomaly Search. VI. Complete Sample of 2018 Sub-Prime-Field Planets
• Microlensing events indicate that super-Earth exoplanets are common in Jupiter-like orbits
• 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
• Mass Production of 2021 KMTNet Microlensing Planets I
• OGLE-2019-BLG-1470LABc: Another Microlensing Giant Planet in a Binary System?
• A Mathematical Treatment of the Offset Microlensing Degeneracy
• Systematic KMTNet Planetary Anomaly Search. XII. Complete Sample of 2017 Subprime Field Planets
• KMT-2017-BLG-0673Lb and KMT-2019-BLG-0414Lb: Two microlensing planets detected in peripheral fields of KMTNet survey
• On the Perturbative Picture and the Chang-Refsdal Lens Approximation for Planetary Microlensing
• Probable brown dwarf companions detected in binary microlensing events during the 2018-2020 seasons of the KMTNet survey
• MOA-2022-BLG-249Lb: Nearby microlensing super-Earth planet detected from high-cadence surveys
• Mass Production of 2021 KMTNet Microlensing Planets II
• Simulations of Triple Microlensing Events I: Detectability of a scaled Sun-Jupiter-Saturn System
• The Brown-dwarf Desert Persists as a Mass-ratio Desert around Low-mass Stars
• Earth-like planet predictor: A machine learning approach
• OGLE-2015-BLG-1609Lb: Sub-jovian planet orbiting a low-mass stellar or brown dwarf host
• KMT-2021-BLG-1150Lb: Microlensing planet detected through a densely covered planetary-caustic signal
• Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function