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OGLE-2013-BLG-1125/MOA-2013-BLG-584: Discovery of a gas giant orbiting an M dwarf

  • E. Bachelet
  • M. Hundertmark
  • V. Bozza
  • J. -P. Beaulieu
  • A. Udalski
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Abstract

We report the discovery and characterization of a planetary system in the microlensing event OGLE-2013-BLG-1125/MOA-2013-BLG-584. We analyze photometric data from OGLE and MOA surveys, as well as LCO, μFUN, and Mindstep follow-up telescopes to model the microlensing light curve. We also used data from the Keck II telescope collected in 2018 to obtain additional constraints on the lensing system. We found a Saturn-mass planet of mass Mp=105±13 M⊕ orbiting a low-mass host star ML=0.139±0.011 M⊙ at 1.00±0.08 kpc from Earth. This discovery adds to the small sample of giant planets orbiting low-mass stars and provides constraints on planet formation theories.

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Cite

BibTeXRIS
BibTeX
@misc{bachelet2026ogle2013blg1125moa2013blg584,
  title = {{OGLE-2013-BLG-1125/MOA-2013-BLG-584: Discovery of a gas giant orbiting an M dwarf}},
  author = {E. Bachelet and M. Hundertmark and V. Bozza and J. -P. Beaulieu and A. Udalski},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.29610},
  eprint = {2610.29610},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.29610},
}
RIS
TY  - UNPB
TI  - OGLE-2013-BLG-1125/MOA-2013-BLG-584: Discovery of a gas giant orbiting an M dwarf
AU  - E. Bachelet
AU  - M. Hundertmark
AU  - V. Bozza
AU  - J. -P. Beaulieu
AU  - A. Udalski
PY  - 2026
DA  - 2026/10/21
PB  - arXiv
DO  - 10.48550/arxiv.2610.29610
UR  - https://arxiv.org/abs/2610.29610
AB  - We report the discovery and characterization of a planetary system in the microlensing event OGLE-2013-BLG-1125/MOA-2013-BLG-584. We analyze photometric data from OGLE and MOA surveys, as well as LCO, μFUN, and Mindstep follow-up telescopes to model the microlensing light curve. We also used data from the Keck II telescope collected in 2018 to obtain additional constraints on the lensing system. We found a Saturn-mass planet of mass M_p=105±13 M_⊕ orbiting a low-mass host star M_L=0.139±0.011 M_⊙ at 1.00±0.08 kpc from Earth. This discovery adds to the small sample of giant planets orbiting low-mass stars and provides constraints on planet formation theories.
ER  -