OGLE-2019-BLG-0468Lb,c: two microlensing giant planets around a G-type star
- Creators
- Han, Cheongho
- Udalski, Andrzej
- Lee, Chung-Uk
- Kim, Doeon
- Zhu, Wei
- Albrow, Michael D.
- Chung, Sun-Ju
- Gould, Andrew
- Hwang, Kyu-Ha
- Jung, Youn Kil
- Kim, Hyoun-Woo
- Ryu, Yoon-Hyun
- Shin, In-Gu
- Shvartzvald, Yossi
- Yee, Jennifer C.
- Zang, Weicheng
- Cha, Sang-Mok
- Kim, Dong-Jin
- Kim, Seung-Lee
- Lee, Dong-Joo
- Lee, Yongseok
- Park, Byeong-Gon
- Pogge, Richard W.
- Kim, Chun-Hwey
- Kim, Woong-Tae
- Mróz, Przemek
- Szymanski, Michał K.
- Skowron, Jan
- Poleski, Radosław
- Soszyński, Igor
- Pietrukowicz, Paweł
- Kozłowski, Szymon
- Rybicki, Krzysztof A.
- Iwanek, Patryk
- Ulaczyk, Krzysztof
- Wrona, Marcin
- Gromadzki, Mariusz
- Buckley, David
- Dong, Subo
- Luo, Ali
- KMTNet Collaboration
- OGLE Collaboration
Abstract
Aims. With the aim of interpreting anomalous lensing events with no suggested models, we conducted a project of reinvestigating microlensing data collected in and before the 2019 season. In this work, we report a multi-planet system, OGLE-2019-BLG-0468L, that was found as a result of this project. Methods. The light curve of the lensing event OGLE-2019-BLG-0468, which consists of three distinctive anomaly features, could not be explained by the usual binary-lens or binary-source interpretations. We find a solution that explains all anomaly features with a triple-lens interpretation, in which the lens is composed of two planets and their host, making the lens the fourth multi-planet system securely found by microlensing. Results. The two planets have masses of ~3.4 M_J and ~10.2 M_J, and they are orbiting around a G-type star with a mass of ~0.9 M_⊙ and a distance of ~4.4 kpc. The host of the planets is most likely responsible for the light of the baseline object, although the possibility of the host being a companion to the baseline object cannot be ruled out.
Additional Information
© ESO 2022. Received: 29 September 2021 Accepted: 5 November 2021. Work by C.H. was supported by the grants of National Research Foundation of Korea (2020R1A4A2002885 and 2019R1A2C2085965). S.D. acknowledges the science research grants from the China Manned Space Project with NO. CMS-CSST-2021-A11. 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 observations using the SALT telescope were conducted under the transients follow up programme 2018-2-LSP-001 (PI: D.B.), which is supported by Poland under grant no. MNiSW DIR/WK/2016/07. D.B. also acknowledges research support from the National Research Foundation. M.G. is supported by the EU Horizon 2020 research and innovation programme under grant agreement No. 101004719.Attached Files
Published - aa42327-21.pdf
Accepted Version - 2111.03755.pdf
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Additional details
- Eprint ID
- 113285
- Resolver ID
- CaltechAUTHORS:20220204-679544000
- 2020R1A4A2002885
- National Research Foundation of Korea
- 2019R1A2C2085965
- National Research Foundation of Korea
- CMS-CSST-2021-A11
- China Manned Space Project
- DIR/WK/2016/07
- Ministerstwo Nauki i Szkolnictwa Wyższego (MNiSW)
- National Research Foundation (South Africa)
- 101004719
- European Research Council (ERC)
- Created
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2022-02-07Created from EPrint's datestamp field
- Updated
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2022-02-07Created from EPrint's last_modified field