Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

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

Abstract : 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).
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03674397
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Friday, May 20, 2022 - 3:26:50 PM
Last modification on : Monday, July 4, 2022 - 9:11:31 AM

Links full text

Identifiers

Collections

Citation

I. -G. Shin, J. C. yee, A. Gould, M. T. Penny, I. A. Bond, et al.. The 2L1S/1L2S Degeneracy for Two Microlensing Planet Candidates Discovered by the KMTNet Survey in 2017. The Astronomical Journal, 2019, 158, ⟨10.3847/1538-3881/ab46a5⟩. ⟨insu-03674397⟩

Share

Metrics

Record views

1