KMT-2022-BLG-0440Lb: A New $q &lt; 10^{-4}$ Microlensing Planet with the Central-Resonant Caustic Degeneracy Broken

Zhang, Jiyuan; Zang, Weicheng; Jung, Youn Kil; Yang, Hongjing; Gould, Andrew; Sumi, Tetsuya; Mao, Shude; Dong, Subo; Albrow, Michael D.; Chung, Sun-Ju; Han, Cheongho; Hwang, Kyu-Ha; Ryu, Yoon-Hyun; Shin, In-Gu; Shvartzvald, Yossi; Yee, Jennifer; Cha, Sang-Mok; Kim, Dong-Jin; Kim, Hyoun-Woo; Lee, Chung-Uk; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Pogge, Richard W.; Qian, Qiyue; Liu, Zhuokai; Maoz, Dan; Penny, Matthew T.; Zhu, Wenwu; Abe, F.; Barry, Richard; Bennett, D. P.; Bhattacharya, Aparna; Bond, I. A.; Fujii, Hirosane; Fukui, A.; Ryusei, Hamada,; Hirao, Yuki; Silva, Stela Ishitani; Itow, Y.; Kirikawa, Rintaro; Kondo, Iona; Koshimoto, Naoki; Matsubara, Y.; Matsumoto, Sho; Miyazaki, Shota; Muraki, Y.; Okamura, Arisa; Olmschenk, Greg; Ranc, Clément; Rattenbury, N. J.; Satoh, Yuichi; Suzuki, D.; Toda, Taiga; Mio, Tomoyoshi,; Tristram, P. J.; Vandorou, Aikaterini; Yama, Hibiki; Kansuke, Yamashita,

doi:10.48550/arxiv.2301.06779

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“…There are three known q < 10 −4 events whose planetary signals occurred on the high-magnification regions (|u anom | < 0.01). They are OGLE-2005-BLG-169 with u anom = 0.0012 (Gould et al 2006), KMT-2021-BLG-0171 with |u anom | = 0.0066 (Yang et al 2022), and KMT-2022-BLG-0440 with |u anom | = 0.0041 (Zhang et al 2023). The follow-up data played decisive roles in these detections, and the combined cadences of survey and follow-up data are higher than 30 hr −1 , while the highest cadence of the current KMTNet survey is 8 hr −1 for about 0.4 deg 2 from the overlap of two Γ = 4 hr −1 fields.…”

Section: The Missing Planetary Caustics Problemmentioning

confidence: 99%

Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10⁻⁴ Planets from the First 4 yr Survey

Zang

Jung

Yang

et al. 2023

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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.

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Section: The Missing Planetary Caustics Problemmentioning

confidence: 99%

Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10⁻⁴ Planets from the First 4 yr Survey

Zang

Jung

Yang

et al. 2023

View full text Add to dashboard Cite

show abstract

KMT-2022-BLG-0440Lb: A New $q < 10^{-4}$ Microlensing Planet with the Central-Resonant Caustic Degeneracy Broken

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Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10⁻⁴ Planets from the First 4 yr Survey

Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10⁻⁴ Planets from the First 4 yr Survey

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KMT-2022-BLG-0440Lb: A New $q < 10^{-4}$ Microlensing Planet with the Central-Resonant Caustic Degeneracy Broken

Cited by 1 publication

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Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10−4 Planets from the First 4 yr Survey

Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10−4 Planets from the First 4 yr Survey

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Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10⁻⁴ Planets from the First 4 yr Survey

Systematic KMTNet Planetary Anomaly Search. VII. Complete Sample of q < 10⁻⁴ Planets from the First 4 yr Survey