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Shin, I.-G.; Yee, J. C.; Gould, A.; Penny, M. T.; Bond, I. A.; Albrow, M. D.; Chung, S.-J.; Han, C.; Hwang, K.-H.; Jung, Y. K.; Ryu, Y.-H.; Shvartzvald, Y.; Cha, S.-M.; Kim, D.-J.; Kim, H.-W.; Kim, S.-L.; Lee, C.-U.; Lee, D.-J.; Lee, Y.; Park, B.-G.; Pogge, R. W.; Abe, F.; Barry, R.; Bennett, D. P.; Bhattacharya, A.; Donachie, M.; Fujii, H.; Fukui, A.; Hirao, Y.; Itow, Y.; Kamei, Y.; Kondo, Iona; Koshimoto, N.; Li, M. C. A.; Matsubara, Y.; Miyazaki, S.; Muraki, Y.; Nagakane, M.; Ranc, C.; Rattenbury, N. J.; Suematsu, Harmon; Sullivan, D. J.; Sumi, T.; Suzuki, Daisuke; Tristram, P. J.; Yamakawa, T.; Yonehara, A.; Fouqué, P.; Zang, W.
The Astronomical journal, 11/2019, Letnik: 158, Številka: 5Journal Article
We report two microlensing planet candidates discovered by the Korea Microlensing Telescope Network (KMTNet) survey in 2017. However, both events have the 2L1S/1L2S degeneracy, which is an obstacle to claiming the discovery of the planets with certainty unless the degeneracy can be resolved. For KMT-2017-BLG-0962, the degeneracy cannot be resolved. If the 2L1S solution is correct, KMT-2017-BLG-0962 might be produced by a super Jupiter-mass planet orbiting a mid-M-dwarf host star. For KMT-2017-BLG-1119, the light-curve modeling favors the 2L1S solution but higher-resolution observations of the baseline object tend to support the 1L2S interpretation rather than the planetary interpretation. This degeneracy might be resolved by a future measurement of the lens-source relative proper motion. This study shows that the problem of resolving 2L1S/1L2S degeneracy exists over a much wider range of conditions than those considered by the theoretical study of Gaudi (1998).
