Mass Production of 2021 KMTNet Microlensing Planets I

Abstract

We inaugurate a program of ``mass production'' of microlensing planets discovered in 2021 KMTNet data, with the aim of laying the basis for future statistical studies. While we ultimately plan to quickly publish all 2021 planets meeting some minimal criteria, the current sample of four was chosen simply on the basis of having low initial estimates of the planet-host mass ratio, $q$. It is therefore notable that 2 members of this sample suffer from a degeneracy in the normalized source radius $\rho$ that arises from different morphologies of closely spaced caustics. All four planets [KMT-2021-BLG-(1391,1253,1372,0748)] have well-characterized mass ratios, $q$, and therefore are suitable for mass-ratio frequency studies. Both of the $\rho$ degeneracies can be resolved by future adaptive optics (AO) observations on 30m class telescopes. We provide general guidance for such AO observations for all events in anticipation of the prospect that they will revolutionize the field of microlensing planets.

39 pages,8 figures, 7 Tables

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Cited by in corpus (13)

• Systematic Reanalysis of KMTNet microlensing events, Paper I: Updates of the Photometry Pipeline and a New Planet Candidate
• Microlensing events indicate that super-Earth exoplanets are common in Jupiter-like orbits
• Systematic KMTNet Planetary Anomaly Search. VI. Complete Sample of 2018 Sub-Prime-Field Planets
• 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
• 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
• MOA-2022-BLG-249Lb: Nearby microlensing super-Earth planet detected from high-cadence surveys
• Mass Production of 2021 KMTNet Microlensing Planets II
• A New Parameterization for Finding Solutions for Microlensing Exoplanet Light Curves
• Binary-lens Microlensing Degeneracy: Impact on Planetary Sensitivity and Mass-ratio Function
• KMT-2021-BLG-1150Lb: Microlensing planet detected through a densely covered planetary-caustic signal