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Two Jupiter-mass Planets Discovered by the KMTNet Survey in 2017

Shin, I.-G. and Ryu, Y.-H. and Yee, J. C. and Gould, A. and Albrow, M. D. and Chung, S.-J. and Han, C. and Hwang, K.-H. and Jung, Y. K. and Shvartzvald, Y. and Zang, W. and Lee, C.-U. and Cha, S.-M. and Kim, D.-J. and Kim, H.-W. and Kim, S.-L. and Lee, Y. and Lee, D.-J. and Park, B.-G. and Pogge, R. W. (2019) Two Jupiter-mass Planets Discovered by the KMTNet Survey in 2017. Astronomical Journal, 157 (4). Art. No. 146. ISSN 1538-3881. doi:10.3847/1538-3881/ab07c2.

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We report two microlensing events, KMT-2017-BLG-1038 and KMT-2017-BLG-1146 that are caused by planetary systems. These events were discovered by KMTNet survey observations from the 2017 bulge season. The discovered systems consist of a planet and host star with mass ratios, 5.3^(+0.2)_(−0.4)×10^(−3) and 2.0^(+0.6)_(−0.1)×10^(−3), respectively. Based on a Bayesian analysis assuming a Galactic model without stellar remnant hosts, we find that the planet, KMT-2017-BLG-1038Lb, is a super Jupiter-mass planet (M_p = 2.04^(+2.02)_(−1.15)M_J) orbiting a mid-M dwarf host (M_h = 0.37^(+0.36)_(−0.20)M⊙) that is located at 6.01^(+1.27)_(−1.72) kpc toward the Galactic bulge. The other planet, KMT-2017-BLG-1146Lb, is a sub Jupiter-mass planet (M_p = 0.71^(+0.80)_(−0.42)M_J) orbiting a mid-M dwarf host (M_h = 0.33^(+0.36)_(−0.20)M⊙) at a distance toward the Galactic bulge of 6.50^(+1.38)_(−2.00) kpc. Both are potentially gaseous planets that are beyond their hosts' snow lines. These typical microlensing planets will be routinely discovered by second-generation microlensing surveys, rapidly increasing the number of detections.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Shin, I.-G.0000-0002-4355-9838
Ryu, Y.-H.0000-0001-9823-2907
Yee, J. C.0000-0001-9481-7123
Albrow, M. D.0000-0003-3316-4012
Chung, S.-J.0000-0001-6285-4528
Hwang, K.-H.0000-0002-9241-4117
Shvartzvald, Y.0000-0003-1525-5041
Pogge, R. W.0000-0003-1435-3053
Additional Information:© 2019 The American Astronomical Society. Received 2018 November 29; revised 2019 February 7; accepted 2019 February 16; published 2019 March 18. 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. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Work by I.G.S. and A.G. was supported by JPL grant 1500811. A.G. acknowledges the support from NSF grant AST-1516842. A.G. received support from the European Research Council under the European Union's Seventh Framework Programme (FP 7) ERC Grant Agreement No. [321035]. Work by C.H. was supported by the grant (2017R1A4A1015178) of National Research Foundation of Korea.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
European Research Council (ERC)321035
National Research Foundation of Korea2017R1A4A1015178
Subject Keywords:planets and satellites: detection – gravitational lensing: micro
Issue or Number:4
Record Number:CaltechAUTHORS:20190318-085652699
Persistent URL:
Official Citation:I.-G. Shin et al 2019 AJ 157 146
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93907
Deposited By: Tony Diaz
Deposited On:18 Mar 2019 16:15
Last Modified:16 Nov 2021 17:01

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