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Three microlensing planets with no caustic-crossing features

Han, Cheongho and Udalski, Andrzej and Kim, Doeon and Lee, Chung-Uk and Albrow, Michael D. and Chung, Sun-Ju and Gould, Andrew and Hwang, Kyu-Ha and Jung, Youn Kil and Ryu, Yoon-Hyun and Shin, In-Gu and Shvartzvald, Yossi and Yee, Jennifer C. and Zang, Weicheng and Cha, Sang-Mok and Kim, Dong-Jin and Kim, Hyoun-Woo and Kim, Seung-Lee and Lee, Dong-Joo and Lee, Yongseok and Park, Byeong-Gon and Pogge, Richard W. and Mróz, Przemek and Szymański, Michał K. and Skowron, Jan and Poleski, Radosław and Soszyński, Igor and Pietrukowicz, Paweł and Kozłowski, Szymon and Ulaczyk, Krzysztof and Rybicki, Krzysztof A. and Iwanek, Patryk and Wrona, Marcin and Gromadzki, Mariusz (2021) Three microlensing planets with no caustic-crossing features. Astronomy and Astrophysics, 650 . Art. No. A89. ISSN 0004-6361. doi:10.1051/0004-6361/202140758. https://resolver.caltech.edu/CaltechAUTHORS:20210603-122506174

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Abstract

Aims. We search for microlensing planets with signals exhibiting no caustic-crossing features, considering the possibility that such signals may be missed due to their weak and featureless nature. Methods. For this purpose, we reexamine the lensing events found by the KMTNet survey before the 2019 season. From this investigation, we find two new planetary lensing events, KMT-2018-BLG-1976 and KMT-2018-BLG-1996. We also present the analysis of the planetary event OGLE-2019-BLG-0954, for which the planetary signal was known but no detailed analysis had previously been presented. We identify the genuineness of the planetary signals by checking various interpretations that can generate short-term anomalies in lensing light curves. Results. From Bayesian analyses conducted with the constraint from available observables, we find that the host and planet masses are (M₁, M₂) ~ (0.65 M⊙, 2 M_J) for KMT-2018-BLG-1976L, ~(0.69 M⊙, 1 M_J) for KMT-2018-BLG-1996L, and ~(0.80 M⊙, 14 M_J) for OGLE-2019-BLG-0954L. The estimated distance to OGLE-2019-BLG-0954L, 3.63_(−1.64)^(+1.22) kpc, indicates that it is located in the disk, and the brightness expected from the mass and distance matches the brightness of the blend well, indicating that the lens accounts for most of the blended flux. The lens of OGLE-2019-BLG-0954 may be resolved from the source by conducting high-resolution follow-up observations in and after 2024.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1051/0004-6361/202140758DOIArticle
https://arxiv.org/abs/2104.06544arXivDiscussion Paper
ORCID:
AuthorORCID
Han, Cheongho0000-0002-2641-9964
Udalski, Andrzej0000-0001-5207-5619
Lee, Chung-Uk0000-0003-0043-3925
Albrow, Michael D.0000-0003-3316-4012
Chung, Sun-Ju0000-0001-6285-4528
Hwang, Kyu-Ha0000-0002-9241-4117
Jung, Youn Kil0000-0002-0314-6000
Ryu, Yoon-Hyun0000-0001-9823-2907
Shin, In-Gu0000-0002-4355-9838
Shvartzvald, Yossi0000-0003-1525-5041
Yee, Jennifer C.0000-0001-9481-7123
Zang, Weicheng0000-0001-6000-3463
Cha, Sang-Mok0000-0002-7511-2950
Kim, Dong-Jin0000-0002-7038-2118
Kim, Hyoun-Woo0000-0001-8263-1006
Kim, Seung-Lee0000-0003-0562-5643
Lee, Yongseok0000-0001-7594-8072
Park, Byeong-Gon0000-0002-6982-7722
Pogge, Richard W.0000-0003-1435-3053
Mróz, Przemek0000-0001-7016-1692
Szymański, Michał K.0000-0002-0548-8995
Skowron, Jan0000-0002-2335-1730
Poleski, Radosław0000-0002-9245-6368
Soszyński, Igor0000-0002-7777-0842
Pietrukowicz, Paweł0000-0002-2339-5899
Kozłowski, Szymon0000-0003-4084-880X
Ulaczyk, Krzysztof0000-0001-6364-408X
Rybicki, Krzysztof A.0000-0002-9326-9329
Iwanek, Patryk0000-0002-6212-7221
Wrona, Marcin0000-0002-3051-274X
Gromadzki, Mariusz0000-0002-1650-1518
Additional Information:© ESO 2021. Article published by EDP Sciences. Received 9 March 2021; Accepted 13 April 2021; Published online 09 June 2021. Work by C.H. was supported by the grants of National Research Foundation of Korea (2019R1A2C2085965 and 2020R1A4A2002885). Work by A.G. was supported by JPL grant 1500811. 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.
Funders:
Funding AgencyGrant Number
National Research Foundation of Korea2019R1A2C2085965
National Research Foundation of Korea2020R1A4A2002885
JPL1500811
National Science Centre (Poland)2014/14/A/ST9/00121
Subject Keywords:gravitational lensing: micro – planets and satellites: detection
DOI:10.1051/0004-6361/202140758
Record Number:CaltechAUTHORS:20210603-122506174
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210603-122506174
Official Citation:Three microlensing planets with no caustic-crossing features. Cheongho Han, Andrzej Udalski, Doeon Kim, Chung-Uk Lee, Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Kyu-Ha Hwang, Youn Kil Jung, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Jennifer C. Yee, Weicheng Zang, Sang-Mok Cha, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Przemek Mróz, Michał K. Szymański, Jan Skowron, Radosław Poleski, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona and Mariusz Gromadzki. A&A, 650 (2021) A89; DOI: https://doi.org/10.1051/0004-6361/202140758
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109362
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:03 Jun 2021 22:58
Last Modified:09 Jun 2021 22:00

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