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 ρ 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 ρ 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.
@article{arxiv.2202.03022,
title = {Mass Production of 2021 KMTNet Microlensing Planets I},
author = {Yoon-Hyun Ryu and Youn Kil Jung and Hongjing Yang and Andrew Gould and Michael D. Albrow and Sun-Ju Chung and Cheongho Han and Kyu-Ha Hwang and In-Gu Shin and Yossi Shvartzvald and Jennifer C. Yee and Weicheng Zang and Sang-Mok Cha and Dong-Jin Kim and %Hyoun-Woo Kim and Seung-Lee Kim and Chung-Uk Lee and Dong-Joo Lee and Yongseok Lee and Byeong-Gon Park and Richard Pogge},
journal= {arXiv preprint arXiv:2202.03022},
year = {2022}
}