Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10−4 Planets from the First 4 yr Survey
Author:
Zang WeichengORCID, Jung Youn KilORCID, Yang HongjingORCID, Zhang Xiangyu, Udalski AndrzejORCID, Yee Jennifer C.ORCID, Gould Andrew, Mao ShudeORCID, Albrow Michael D.ORCID, Chung Sun-JuORCID, Han CheonghoORCID, Hwang Kyu-HaORCID, Ryu Yoon-HyunORCID, Shin In-GuORCID, Shvartzvald YossiORCID, Cha Sang-Mok, Kim Dong-Jin, Kim Hyoun-WooORCID, Kim Seung-LeeORCID, Lee Chung-UkORCID, Lee Dong-Joo, Lee Yongseok, Park Byeong-GonORCID, Pogge Richard W.ORCID, Mróz PrzemekORCID, Skowron JanORCID, Poleski RadoslawORCID, Szymański Michał K.ORCID, Soszyński IgorORCID, Pietrukowicz PawełORCID, Kozłowski SzymonORCID, Ulaczyk KrzysztofORCID, Rybicki Krzysztof A.ORCID, Iwanek PatrykORCID, Wrona MarcinORCID, Gromadzki MariuszORCID, Wang Hanyue, Zhang JiyuanORCID, Zhu WeiORCID, , , ,
Abstract
Abstract
We present the analysis of seven microlensing planetary events with planet/host mass ratios q < 10−4: KMT-2017-BLG-1194, KMT-2017-BLG-0428, KMT-2019-BLG-1806, KMT-2017-BLG-1003, KMT-2019-BLG-1367, OGLE-2017-BLG-1806, and KMT-2016-BLG-1105. They were identified by applying the Korea Microlensing Telescope Network (KMTNet) AnomalyFinder algorithm to 2016–2019 KMTNet events. A Bayesian analysis indicates that all the lens systems consist of a cold super-Earth orbiting an M or K dwarf. Together with 17 previously published and three that will be published elsewhere, AnomalyFinder has found a total of 27 planets that have solutions with q < 10−4 from 2016–2019 KMTNet events, which lays the foundation for the first statistical analysis of the planetary mass-ratio function based on KMTNet data. By reviewing the 27 planets, we find that the missing planetary caustics problem in the KMTNet planetary sample has been solved by AnomalyFinder. We also find a desert of high-magnification planetary signals (A ≳ 65), and a follow-up project for KMTNet high-magnification events could detect at least two more q < 10−4 planets per year and form an independent statistical sample.
Funder
the National Science Foundation of China the Korea Astronomy and Space Science Institute under the R & D program N.S.F. National Research Foundation of Korea the China Manned Space Project Tsinghua University Initiative Scientific Research Program
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
11 articles.
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