An Earth-mass planet in a time of COVID-19: KMT-2020-BLG-0414Lb

We report the discovery of KMT-2020-BLG-0414Lb, with a planet-to-host mass ratio q 2 = 0.9–1.2 × 10−5 = 3–4 ⊕ at 1σ, which is the lowest mass-ratio microlensing planet to date. Together with two other recent discoveries (4 ≲ q/q ⊕ ≲ 6), it fills out the previous empty sector at the bottom of the tri...

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Published in:	Research in astronomy and astrophysics 2021-11, Vol.21 (9), p.239-261
Main Authors:	Zang, Weicheng, Han, Cheongho, Kondo, Iona, Yee, Jennifer C., Lee, Chung-Uk, Gould, Andrew, Mao, Shude, de Almeida, Leandro, Shvartzvald, Yossi, Zhang, Xiangyu, Albrow, Michael D., Chung, Sun-Ju, Hwang, Kyu-Ha, Jung, Youn Kil, Ryu, Yoon-Hyun, Shin, In-Gu, Cha, Sang-Mok, Kim, Dong-Jin, Kim, Hyoun-Woo, Kim, Seung-Lee, Lee, Dong-Joo, Lee, Yongseok, Park, Byeong-Gon, Pogge, Richard W., Drummond, John, Tan, Thiam-Guan, Nascimento Júnior, José Dias do, Maoz, Dan, Penny, Matthew T., Zhu, Wei, Bond, Ian A., Abe, Fumio, Barry, Richard, Bennett, David P., Bhattacharya, Aparna, Donachie, Martin, Fujii, Hirosane, Fukui, Akihiko, Hirao, Yuki, Itow, Yoshitaka, Kirikawa, Rintaro, Koshimoto, Naoki, Alex Li, Man Cheung, Matsubara, Yutaka, Muraki, Yasushi, Miyazaki, Shota, Olmschenk, Greg, Ranc, Clément, Rattenbury, Nicholas J., Satoh, Yuki, Shoji, Hikaru, Silva, Stela Ishitani, Sumi, Takahiro, Suzuki, Daisuke, Tanaka, Yuzuru, Tristram, Paul J., Yamawaki, Tsubasa, Yonehara, Atsunori, Petric, Andreea, Burdullis, Todd, Fouqué, Pascal
Format:	Article
Language:	English
Subjects:	Coronaviruses COVID-19 Extrasolar planets gravitational lensing: micro Light curve Microlenses Parallax Planets Sciences of the Universe Shutdowns Spectroscopic observation
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