KMT-2018-BLG-1990Lb: A Nearby Jovian Planet From A Low-Cadence Microlensing Field

Abstract

We report the discovery and characterization of KMT-2018-BLG-1990Lb, a Jovian planet $(m_p=0.57_{-0.25}^{+0.79}{M}_J)$ orbiting a late M dwarf $(M=0.14_{-0.06}^{+0.20}{M}_{\odot })$, at a distance $(D_L=1.23_{-0.43}^{+1.06}\,\kpc)$, and projected at $2.6\pm 0.6$ times the snow line distance, i.e., $a_{\rm snow}\equiv 2.7\,\au (M/M_\odot)$, This is the second Jovian planet discovered by KMTNet in its low cadence ($0.4{\mathrm{hr}}^{-1}$) fields, demonstrating that this population will be well characterized based on survey-only microlensing data.

24 pages, 7 figures, 4 tables

References in corpus (3)

• Predictions for Microlensing Planetary Events from Core Accretion Theory
• Optimal Survey Strategies and Predicted Planet Yields for the Korean Microlensing Telescope Network
• Kmt-2016-blg-1397b: Kmtnet-only discovery of a microlens giant planet

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• KMT-2022-BLG-0440Lb: A New $q<10^{-4}$ Microlensing Planet with the Central-Resonant Caustic Degeneracy Broken
• Mass Production of 2021 KMTNet Microlensing Planets III: Analysis of Three Giant Planets
• KMT-2016-BLG-1836Lb: A Super-Jovian Planet From A High-Cadence Microlensing Field
• Using Source Proper Motion to Validate Terrestrial Parallax: OGLE-2019-BLG-1058