학술논문
Systematic KMTNet Planetary Anomaly Search. XII. Complete Sample of 2017 Subprime Field Planets
Document Type
article
Author
Yuqian Gui; Weicheng Zang; Ruocheng Zhai; Yoon-Hyun Ryu; Andrzej Udalski; Hongjing Yang; Cheongho Han; Shude Mao; Leading Authors; Michael D. Albrow; Sun-Ju Chung; Andrew Gould; Kyu-Ha Hwang; Youn Kil Jung; In-Gu Shin; Yossi Shvartzvald; Jennifer C. Yee; Sang-Mok Cha; Dong-Jin Kim; Hyoun-Woo Kim; Seung-Lee Kim; Chung-Uk Lee; Dong-Joo Lee; Yongseok Lee; Byeong-Gon Park; Richard W. Pogge; The KMTNet Collaboration; Przemek Mróz; Michał K. Szymański; Jan Skowron; Radosław Poleski; Igor Soszyński; Paweł Pietrukowicz; Szymon Kozłowski; Krzysztof Ulaczyk; Krzysztof A. Rybicki; Patryk Iwanek; Marcin Wrona; Mariusz Gromadzki; The OGLE Collaboration; Hanyue Wang; Jiyuan Zhang; Renkun Kuang; Qiyue Qian; Wei Zhu; The MAP Collaboration
Source
The Astronomical Journal, Vol 168, Iss 2, p 49 (2024)
Subject
Language
English
ISSN
1538-3881
Abstract
We report the analysis of four unambiguous planets and one possible planet from the subprime fields (Γ ≤ 1 hr ^−1 ) of the 2017 Korea Microlensing Telescope Network (KMTNet) microlensing survey, to complete the KMTNet AnomalyFinder planetary sample for the 2017 subprime fields. They are KMT-2017-BLG-0849, KMT-2017-BLG-1057, OGLE-2017-BLG-0364, and KMT-2017-BLG-2331 (unambiguous), as well as KMT-2017-BLG-0958 (possible). For the four unambiguous planets, the mean planet–host mass ratios, q , are (1.0, 1.2, 4.6, 13) × 10 ^−4 , the median planetary masses are (6.4, 24, 76, 171) M _⊕ , and the median host masses are (0.19, 0.57, 0.49, 0.40) M _⊙ , respectively, found from a Bayesian analysis. We have completed the Anomaly Finder planetary sample from the first 4 yr of KMTNet data (2016–2019), with 112 unambiguous planets in total, which nearly tripled the microlensing planetary sample. The “sub-Saturn desert” ( $\mathrm{log}q=\left[-3.6,-3.0\right]$ ) found in the 2018 and 2019 KMTNet samples is confirmed by the 2016 and 2017 KMTNet samples.