Details

Autor(en) / Beteiligte

• 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.

Titel

The 2L1S/1L2S Degeneracy for Two Microlensing Planet Candidates Discovered by the KMTNet Survey in 2017

Ist Teil von

• The Astronomical journal, 2019-11, Vol.158 (5), p.199

Ort / Verlag

Goddard Space Flight Center: The American Astronomical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• 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).