OGLE-2013-BLG-1125/MOA-2013-BLG-584: Discovery of a gas giant orbiting an M dwarf
Year: 2026
Type: article
Abstract: 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.
Source: Astronomy and Astrophysics
Authors: E. Bachelet, M. Hundertmark, V. Bozza, J.-P. Beaulieu, A. Udalski, J. C. Yee, Y. Tsapras, R. A. Street, D. M. Bramich, P. Browne, M. Dominik, K. Horne, S. Ipatov, C. Snodgrass, I. A. Steele, R. Figuera Jaimes, N. Kains, G. D'Ago, P. Mróz, R. Poleski, J. Skowron, M. K. Szymański, I. Soszyński, P. Pietrukowicz, S. Kozłowski, K. Ulaczyk, F. Abe, D. P. Bennett, A. Bhattacharya, I. A. Bond, R. Hamada, Y. Hirao, A. Ideui, S. Ishitani Silva, S. Miyazaki, Y. Muraki, T. Nagai, K. Nunota, G. Olmschenk, C. Ranc, N. J. Rattenbury, Y. K. Satoh, T. Sumi, D. Suzuki, T. Tamaoki, S. K. Terry, P. J. Tristram, A. Vandorou, H. Yama, M. D. Albrow, D. L. DePoy, A. Gould, C.-U. Lee, R. W. Pogge, J. W. Blackman, J.-B. Marquette
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,865
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
Awards: G170708805, Cambridge Astronomical Survey Unit (CASU) (2023-2026): Powering Next Generation Survey Analysis and Processing, NSF-BSF: The Frequency and Mass-Ratio Distribution of Super-Earths in KMTNet, G4753320163, Cambridge Astronomical Survey Unit (CASU): Filling the Astronomical Data Lake (2020-2024), Space based Microlensing surveys combining Roman and Euclid, G7796512131, G8898111851
OpenAlex ID: W7223242693