OGLE-2013-BLG-1125/MOA-2013-BLG-584: Discovery of a gas giant orbiting an M dwarf
During the summer season of 2013, survey and follow-up teams using conventional and robotic telescopes combined their efforts to identify and characterize planetary deviations in microlensing events towards the Galactic bulge. We report the discovery and characterization of a planetary system in the microlensing event OGLE-2013-BLG-1125/MOA-2013-BLG-584. We analyzed 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_ ̊m p =105 =0.139 M_⊕ orbiting a low-mass host star M_ ̊m L M_⊙ at 1.00 kpc from Earth. This discovery adds to the small sample of giant planets orbiting low-mass stars and provides constraints on planet formation theories.
Authors
- I. Soszyński (ORCID: https://orcid.org/0000-0002-7777-0842)
- P. Mróz
- Sergei I. Ipatov (ORCID: https://orcid.org/0000-0002-1413-9180)
- Darren L. DePoy (ORCID: https://orcid.org/0000-0002-2581-9309)
- Y. Muraki (ORCID: https://orcid.org/0000-0003-0097-5185)
- R. Poleski (ORCID: https://orcid.org/0000-0002-9245-6368)
- V. Bozza (ORCID: https://orcid.org/0000-0003-4590-0136)
- Rachel A. Street (ORCID: https://orcid.org/0000-0001-6279-0552)
- C. Snodgrass (ORCID: https://orcid.org/0000-0001-9328-2905)
- Joshua W. Blackman (ORCID: https://orcid.org/0000-0001-5860-1157)
- Andrzej Udalski (ORCID: https://orcid.org/0000-0001-5207-5619)
- R. Figuera Jaimes (ORCID: https://orcid.org/0000-0003-3425-6605)
- N. Kains (ORCID: https://orcid.org/0000-0001-8803-6769)
- Iain A. Steele (ORCID: https://orcid.org/0000-0001-8397-5759)
- Krzysztof Ulaczyk (ORCID: https://orcid.org/0000-0001-6364-408X)
- R. W. Pogge
- M. Dominik (ORCID: https://orcid.org/0000-0002-3202-0343)
- A. Bhattacharya (ORCID: https://orcid.org/0009-0006-4916-9546)
- Andy Gould
- Paul . J. Tristram (ORCID: https://orcid.org/0009-0009-8289-9884)
- Szymon Kozłowski (ORCID: https://orcid.org/0000-0003-4084-880X)
- Yiannis Tsapras (ORCID: https://orcid.org/0000-0001-8411-351X)
- D. P. Bennett (ORCID: https://orcid.org/0000-0001-8043-8413)
- J.-B. Marquette
- D. M. Bramich
- F. Abe (ORCID: https://orcid.org/0009-0000-8865-4778)
- P. Browne
- N. J. Rattenbury
- I. A. Bond
- P. Pietrukowicz
- E. Bachelet
- M. Hundertmark
- J. -P. Beaulieu
- T. Tamaoki
- H. Yama
- S. K. Terry
- G. Olmschenk
- A. Vandorou
- R. Hamada
- D. Suzuki
- K. Nunota
- Y. K. Satoh
- C. Ranc
- S. Ishitani Silva
- C.-U. Lee
- T. Nagai
- Y. Hirao
- A. Ideui
- T. Sumi
- G. D'Ago
- M. D. Albrow
- J. Skowron
- S. Miyazaki
- J. C. Yee
- M. K. Szymański
- K. Horne
Publication Details
- Journal
- Astronomy and Astrophysics
- Published
- 2026-11-06
- DOI
- https://doi.org/10.1051/0004-6361/202660414
- Primary Topic
- Stellar, planetary, and galactic studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- National Aeronautics and Space Administration
- W. M. Keck Foundation
- California Institute of Technology
- UK Research and Innovation
- Australian Government
- University of Tasmania
- Agence Nationale de la Recherche
- Science and Technology Facilities Council
- Japan Society for the Promotion of Science