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Journal Articles The Astronomical Journal Year : 2019

OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star

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Cheongho Han
  • Function : Author
David P. Bennett
  • Function : Author
Andrzej Udalski
  • Function : Author
Andrew Gould
Ian A. Bond
  • Function : Author
Yossi Shvartzvald
  • Function : Author
Kay-Sebastian Nikolaus
  • Function : Author
Markus Hundertmark
  • Function : Author
Valerio Bozza
  • Function : Author
Yuki Hirao
  • Function : Author
Etienne Bachelet
  • Function : Author
Michael D. Albrow
  • Function : Author
Sun-Ju Chung
  • Function : Author
Kyeongsoo Hong
  • Function : Author
Kyu-Ha Hwang
  • Function : Author
Chung-Uk Lee
  • Function : Author
Yoon-Hyun Ryu
  • Function : Author
In-Gu Shin
  • Function : Author
Jennifer C. Yee
  • Function : Author
Youn Kil Jung
  • Function : Author
Sang-Mok Cha
  • Function : Author
Doeon Kim
  • Function : Author
Dong-Jin Kim
  • Function : Author
Hyoun-Woo Kim
  • Function : Author
Seung-Lee Kim
  • Function : Author
Dong-Joo Lee
  • Function : Author
Yongseok Lee
  • Function : Author
Byeong-Gon Park
  • Function : Author
Richard W. Pogge
  • Function : Author
Przemek Mróz
  • Function : Author
Michał K. Szymański
  • Function : Author
Jan Skowron
Radek Poleski
  • Function : Author
Igor Soszyński
  • Function : Author
Paweł Pietrukowicz
  • Function : Author
Szymon Kozłowski
  • Function : Author
Krzysztof Ulaczyk
  • Function : Author
Krzysztof A. Rybicki
  • Function : Author
Patryk Iwanek
  • Function : Author
Marcin Wrona
  • Function : Author
Fumio Abe
  • Function : Author
Richard Barry
  • Function : Author
Aparna Bhattacharya
  • Function : Author
Martin Donachie
  • Function : Author
Akihiko Fukui
Yoshitaka Itow
Kohei Kawasaki
  • Function : Author
Iona Kondo
Naoki Koshimoto
Man Cheung Alex Li
  • Function : Author
Yutaka Matsubara
  • Function : Author
Yasushi Muraki
Shota Miyazaki
Masayuki Nagakane
  • Function : Author
Clément Ranc
  • Function : Author
  • PersonId : 1181264
  • IdHAL : cr
Nicholas J. Rattenbury
  • Function : Author
Haruno Suematsu
  • Function : Author
Denis J. Sullivan
  • Function : Author
Takahiro Sumi
Daisuke Suzuki
Paul J. Tristram
  • Function : Author
Atsunori Yonehara
  • Function : Author
Shude Mao
  • Function : Author
Tianshu Wang
  • Function : Author
Weicheng Zang
  • Function : Author
Wei Zhu
  • Function : Author
Matthew T. Penny
  • Function : Author
Charles A. Beichman
  • Function : Author
Geoffery Bryden
  • Function : Author
Sebastiano Calchi Novati
  • Function : Author
B. Scott Gaudi
Calen B. Henderson
  • Function : Author
Savannah Jacklin
  • Function : Author
Keivan G. Stassun
  • Function : Author

Abstract

We report a multiplanetary system found from the analysis of microlensing event OGLE-2018-BLG-1011, for which the light curve exhibits a double-bump anomaly around the peak. We find that the anomaly cannot be fully explained by the binary-lens or binary-source interpretations and its description requires the introduction of an additional lens component. The 3L1S (three lens components and a single source) modeling yields three sets of solutions, in which one set of solutions indicates that the lens is a planetary system in a binary, while the other two sets imply that the lens is a multiplanetary system. By investigating the fits of the individual models to the detailed light curve structure, we find that the multiple-planet solution with planet-to-host mass ratios ∼9.5 × 10-3 and ∼15 × 10-3 are favored over the other solutions. From the Bayesian analysis, we find that the lens is composed of two planets with masses {1.8}-1.1+3..4 {M}{{J}} and {2.8}-1.7+5.1 {M}{{J}} around a host with a mass {0.18}-0.10+0.33 {M} and located at a distance {7.1}-1.5+1.1 {kpc}. The estimated distance indicates that the lens is the farthest system among the known multiplanetary systems. The projected planet-host separations are {a}\perp ,2={1.8}-1.5+2.1 {au} ({0.8}-0.6+0.9 {au}) and {a}\perp ,3={0.8}-0.6+0.9 {au}, where the values of a ⊥,2 inside and outside the parenthesis are the separations corresponding to the two degenerate solutions, indicating that both planets are located beyond the snow line of the host, as with the other four multiplanetary systems previously found by microlensing.

Dates and versions

insu-03674410 , version 1 (20-05-2022)

Identifiers

Cite

Cheongho Han, David P. Bennett, Andrzej Udalski, Andrew Gould, Ian A. Bond, et al.. OGLE-2018-BLG-1011Lb,c: Microlensing Planetary System with Two Giant Planets Orbiting a Low-mass Star. The Astronomical Journal, 2019, 158, ⟨10.3847/1538-3881/ab2f74⟩. ⟨insu-03674410⟩
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