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KMT-2018-BLG-1292: A Super-Jovian Microlens Planet in the Galactic Plane

Ryu, Yoon-Hyun and Navarro, Maria Gabriela and Gould, Andrew and Albrow, Michael D. and Chung, Sun-Ju and Han, Cheongho and Hwang, Kyu-Ha and Jung, Youn Kil 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 Minniti, Dante and Saito, Roberto K. and Alonso-García, Javier and Penny, Matthew T. (2020) KMT-2018-BLG-1292: A Super-Jovian Microlens Planet in the Galactic Plane. Astronomical Journal, 159 (2). Art. No. 58. ISSN 1538-3881. doi:10.3847/1538-3881/ab5e7e.

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We report the discovery of KMT-2018-BLG-1292Lb, a super-Jovian M_(planet) = 5.0 ± 1.2 M_J planet orbiting an F or G dwarf M_(host) = 1.2 ± 0.3 M⊙, which lies physically within O(10 pc) of the Galactic plane. The source star is a heavily extincted A_I ~ 5.2 luminous giant that has the lowest Galactic latitude, b = −0.°28, of any planetary microlensing event. The relatively blue blended light is almost certainly either the host or its binary companion, with the first explanation being substantially more likely. This blend dominates the light at the I band and completely dominates at the R and V bands. Hence, the lens system can be probed by follow-up observations immediately, i.e., long before the lens system and the source separate due to their relative proper motion. The system is well characterized despite the low cadence, Γ = 0.15–0.20 hr⁻¹, of observations and short viewing windows near the end of the bulge season. This suggests that optical microlensing planet searches can be extended to the Galactic plane at relatively modest cost.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Ryu, Yoon-Hyun0000-0001-9823-2907
Navarro, Maria Gabriela0000-0002-1860-2304
Albrow, Michael D.0000-0003-3316-4012
Chung, Sun-Ju0000-0001-6285-4528
Han, Cheongho0000-0002-2641-9964
Hwang, Kyu-Ha0000-0002-9241-4117
Jung, Youn Kil0000-0002-0314-6000
Shin, In-Gu0000-0002-4355-9838
Shvartzvald, Yossi0000-0003-1525-5041
Yee, Jennifer C.0000-0001-9481-7123
Zang, Weicheng0000-0001-6000-3463
Kim, Hyoun-Woo0000-0001-8263-1006
Pogge, Richard W.0000-0003-1435-3053
Minniti, Dante0000-0002-7064-099X
Saito, Roberto K.0000-0001-6878-8648
Alonso-García, Javier0000-0003-3496-3772
Penny, Matthew T.0000-0001-7506-5640
Additional Information:© 2020 The American Astronomical Society. Received 2019 May 13; revised 2019 November 19; accepted 2019 December 1; published 2020 January 20. We thanks Christopher Kochanek for providing SMARTS ANDICAM I/H data. A.G. was supported by AST-1516842 from the US NSF and by JPL grant 1500811. Work by C.H. was supported by grant 2017R1A4A1015178 of the National Research Foundation of Korea. 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. We also gratefully acknowledge the use of data from the ESO Public Survey program IDs 179.B-2002 and 198.B-2004 taken with the VISTA telescope, and data products from the Cambridge Astronomical Survey Unit (CASU). D.M. gratefully acknowledges support provided by the Ministry for Economy, Development and Tourism, Programa Iniciativa Cientifica Milenio grant IC120009, awarded to the Millennium Institute of Astrophysics (MAS), by the BASAL Center for Astrophysics and Associated Technologies (CATA) through grant AFB-170002, and by project Fondecyt No. 1170121. R.K.S. acknowledges support from CNPq/Brazil through through projects 308968/2016-6 and 421687/2016-9. J.A.-G. acknowledges support by the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to the Millennium Institute of Astrophysics (MAS).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
National Research Foundation of Korea2017R1A4A1015178
Iniciativa Científica Milenio del Ministerio de Economía, Fomento y TurismoIC120009
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1170121
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)308968/2016-6
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)421687/2016-9
Subject Keywords:Gravitational microlensing
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Gravitational microlensing (672)
Record Number:CaltechAUTHORS:20200122-083818394
Persistent URL:
Official Citation:Yoon-Hyun Ryu et al 2020 AJ 159 58
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100827
Deposited By: Tony Diaz
Deposited On:22 Jan 2020 16:56
Last Modified:16 Nov 2021 17:57

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