Three faint-source microlensing planets detected via the resonant-caustic channel
- Creators
- Han, Cheongho
- Udalski, Andrzej
- Kim, Doeon
- Ryu, Yoon-Hyun
- Bozza, Valerio
- Albrow, Michael D.
- Chung, Sun-Ju
- Gould, Andrew
- Hwang, Kyu-Ha
- Jung, Youn Kil
- Lee, Chung-Uk
- Shin, In-Gu
- Shvartzvald, Yossi
- Yee, Jennifer C.
- Zang, Weicheng
- Cha, Sang-Mok
- Kim, Dong-Jin
- Kim, Hyoun-Woo
- Kim, Seung-Lee
- Lee, Dong-Joo
- Lee, Yongseok
- Park, Byeong-Gon
- Pogge, Richard W.
- Mróz, Przemek
- Szymański, Michał K.
- Skowron, Jan
- Poleski, Radosław
- Soszyński, Igor
- Pietrukowicz, Paweł
- Kozłowski, Szymon
- Ulaczyk, Krzysztof
- Rybicki, Krzysztof A.
- Iwanek, Patryk
- Wrona, Marcin
- Gromadzki, Mariusz
- KMTNet Collaboration
- OGLE Collaboration
Abstract
Aims. We conducted a project of reinvestigating the 2017–2019 microlensing data collected by high-cadence surveys with the aim of finding planets that were missed due to the deviations of planetary signals from the typical form of short-term anomalies. Methods. The project led us to find three planets, KMT-2017-BLG-2509Lb, OGLE-2017-BLG-1099Lb, and OGLE-2019-BLG-0299Lb. The lensing light curves of the events have a common characteristic: the planetary signals were produced by the crossings of faint source stars over the resonant caustics formed by giant planets located near the Einstein rings of host stars. Results. For all planetary events, the lensing solutions are uniquely determined without any degeneracy. It is estimated that the host masses are in the range of 0.45 ≲ M∕M_⊙ ≲ 0.59, which corresponds to early M to late K dwarfs, and thus the host stars are less massive than the Sun. On the other hand, the planets, with masses in the range of 2.1 ≲ M∕M_J ≲ 6.2, are heavier than the heaviest planet of the Solar System, that is, Jupiter. The planets in all systems lie beyond the snow lines of the hosts, and thus the discovered planetary systems, together with many other microlensing planetary systems, support the idea that massive gas-giant planets are commonplace around low-mass stars. We discuss the role of late-time high-resolution imaging in clarifying resonant-image lenses with very faint sources.
Additional Information
© ESO 2021. Article published by EDP Sciences. Received 11 June 2021; Accepted 14 September 2021; Published online 04 November 2021. Work by C.H. was supported by the grants of National Research Foundation of Korea (2019R1A2C2085965 and 2020R1A4A2002885). This work was conducted during the research year of Chungbuk National University in 2021. This research has made use of the KMTNet system operated by the Korea Astronomy and Space Science Institute (KASI) and the data were obtained at three host sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to AU.Attached Files
Published - aa41517-21.pdf
Submitted - 2109.07068.pdf
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Additional details
- Eprint ID
- 111898
- Resolver ID
- CaltechAUTHORS:20211116-182530437
- 2019R1A2C2085965
- National Research Foundation of Korea
- 2020R1A4A2002885
- National Research Foundation of Korea
- MAESTRO 2014/14/A/ST9/00121
- National Science Centre (Poland)
- Created
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2021-11-16Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field