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OGLE-2018-BLG-1428Lb: a Jupiter-mass planet beyond the snow line of a dwarf star

Kim, Yun Hak and Chung, Sun-Ju and Udalski, Andrej and Gould, Andrew and Albrow, Michael D. and Jung, Youn Kil and Hwang, Kyu-Ha and Han, Cheongho 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, Chung-Uk and Lee, Dong-Joo and Lee, Yongseok and Park, Byeong-Gon and Pogge, Richard W. and Mróz, Przemek and Poleski, Radek and Wrona, Marcin and Iwanek, Patryk and Szymański, Michał K. and Skowron, Jan and Soszyński, Igor and Kozłowski, Szymon and Pietrukowicz, Paweł and Ulaczyk, Krzysztof and Rybicki, Krzysztof (2021) OGLE-2018-BLG-1428Lb: a Jupiter-mass planet beyond the snow line of a dwarf star. Monthly Notices of the Royal Astronomical Society, 503 (2). pp. 2706-2712. ISSN 0035-8711. doi:10.1093/mnras/stab534.

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We present the analysis of the microlensing event OGLE-2018-BLG-1428, which has a short-duration (∼1 d) caustic-crossing anomaly. The event was caused by a planetary lens system with planet/host mass ratio q = 1.7 × 10⁻³. Because of the detection of the caustic-crossing anomaly, the finite source effect was well measured, but the microlens parallax was not constrained due to the relatively short time-scale (t_E = 24 d). From a Bayesian analysis, we find that the host star is a dwarf star M_(host) = 0.43−0.22+0.33 M⊙ at a distance D_L = 6.22−1.51+1.03 kpc and the planet is a Jovian-mass planet M_p = 0.77−0.53+0.77 M_J with a projected separation a⊥ = 3.30−0.83+0.59 au⁠. The planet orbits beyond the snow line of the host star. Considering the relative lens-source proper motion of μ_(rel) = 5.58±0.38 mas yr⁻¹⁠, the lens can be resolved by adaptive optics with a 30 m telescope in the future.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Chung, Sun-Ju0000-0001-6285-4528
Albrow, Michael D.0000-0003-3316-4012
Jung, Youn Kil0000-0002-0314-6000
Hwang, Kyu-Ha0000-0002-9241-4117
Han, Cheongho0000-0002-2641-9964
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, Chung-Uk0000-0003-0043-3925
Lee, Yongseok0000-0001-7594-8072
Park, Byeong-Gon0000-0002-6982-7722
Pogge, Richard W.0000-0003-1435-3053
Mróz, Przemek0000-0001-7016-1692
Poleski, Radek0000-0002-9245-6368
Wrona, Marcin0000-0002-3051-274X
Iwanek, Patryk0000-0002-6212-7221
Szymański, Michał K.0000-0002-0548-8995
Skowron, Jan0000-0002-2335-1730
Soszyński, Igor0000-0002-7777-0842
Kozłowski, Szymon0000-0003-4084-880X
Pietrukowicz, Paweł0000-0002-2339-5899
Ulaczyk, Krzysztof0000-0001-6364-408X
Rybicki, Krzysztof0000-0002-9326-9329
Additional Information:© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2021 February 19. Received 2021 February 17; in original form 2020 August 17. Published: 25 February 2021. Work by Y. H. Kim and S-J Chung was supported by the KASI (Korea Astronomy and Space Science Institute) grant 2021-1-830-08. Work by AG was supported by JPL grant 1500811. Work by CH was supported by the grant of National Research Foundation of Korea (2019R1A2C2085965 and 2020R1A4A2002885). The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A.U. This research has used the KMTNet system operated by the KASI, and the data were obtained at three sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia. Data Availability: The data underlying this article will be shared on reasonable request to the corresponding author.
Funding AgencyGrant Number
Korea Astronomy and Space Science Institute (KASI)2021-1-830-08
National Research Foundation of Korea2019R1A2C2085965
National Research Foundation of Korea2020R1A4A2002885
National Science Centre (Poland)MAESTRO 2014/14/A/ST9/00121
Subject Keywords:gravitational lensing: micro – planets and satellites: detection
Issue or Number:2
Record Number:CaltechAUTHORS:20210601-152925531
Persistent URL:
Official Citation:Yun Hak Kim, Sun-Ju Chung, Andrej Udalski, Andrew Gould, Michael D Albrow, Youn Kil Jung, Kyu-Ha Hwang, Cheongho Han, 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, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W Pogge, (KMTNet Collaboration), Przemek Mróz, Radek Poleski, Marcin Wrona, Patryk Iwanek, Michał K Szymański, Jan Skowron, Igor Soszyński, Szymon Kozłowski, Paweł Pietrukowicz, Krzysztof Ulaczyk, Krzysztof Rybicki, (The OGLE collaboration), OGLE-2018-BLG-1428Lb: a Jupiter-mass planet beyond the snow line of a dwarf star, Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 2, May 2021, Pages 2706–2712,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109332
Deposited By: Tony Diaz
Deposited On:01 Jun 2021 22:46
Last Modified:01 Jun 2021 22:46

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