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Peer-reviewedCC BY 4.0The Astronomical Journal

Image-constrained Modeling with Hubble and Keck Images Reveals that OGLE-2012-BLG-0563Lb is a Jupiter-mass Planet Orbiting a K Dwarf

  • David P. Bennett1,2
  • Aparna Bhattacharya1,2
  • Jean-Philippe Beaulieu3,4
  • Naoki Koshimoto5
  • Joshua W. Blackman6
  • Ian A. Bond7
  • Clément Ranc8
  • Natalia Rektsini3,4
  • Sean K. Terry1,2
  • Aikaterini Vandorou1,2
8 affiliations
  1. 1NASA Goddard Space Flight Center
  2. 2University of Maryland
  3. 3University of Tasmania
  4. 4Institut d’Astrophysique de Paris
  5. 5Osaka University
  6. 6Universität Bern
  7. 7Massey University
  8. 8Sorbonne Universitlé
Open at sourcePDFDOICite

Abstract

We present high-angular-resolution imaging from the Hubble Space Telescope combined with adaptive optics imaging results from the Keck-II telescope to determine the mass of the OGLE-2012-BLG-0563L host star and planet to be M host = 0.801 ± 0.033 M ⊙ and M planet = 1.116 ± 0.087 M Jupiter , respectively, located at a distance of D L = 5.46 ± 0.56 kpc. There is a close–wide degeneracy in the light-curve models that indicates a star–planet projected separation of 1.50 ± 0.16 au for the close model and 8.41 ± 0.87 au for the wide model. We used the image-constrained modeling method to analyze the light-curve data with constraints from the high-angular-resolution image analysis. This revealed systematic errors in some of the ground-based light-curve photometry, which led to an estimate of the angular Einstein Radius, θ E , that was too large by a factor of ∼2. The host star mass is a factor of 2.4 larger than the value presented in the A. Fukui et al. discovery paper. Although most systematic photometry errors seen in ground-based microlensing light-curve photometry will not be repeated in data from the Roman Space Telescope’s Galactic Bulge Time Domain Survey, we argue that image-constrained modeling will be a valuable method for identifying possible systematic errors in Roman photometry.

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Cite

BibTeXRIS
BibTeX
@article{bennett2026imageconstrained,
  title = {{Image-constrained Modeling with Hubble and Keck Images Reveals that OGLE-2012-BLG-0563Lb is a Jupiter-mass Planet Orbiting a K Dwarf}},
  author = {David P. Bennett and Aparna Bhattacharya and Jean-Philippe Beaulieu and Naoki Koshimoto and Joshua W. Blackman and Ian A. Bond and Clément Ranc and Natalia Rektsini and Sean K. Terry and Aikaterini Vandorou},
  journal = {The Astronomical Journal},
  year = {2026},
  month = nov,
  doi = {10.3847/1538-3881/adb1b1},
  url = {https://iopscience.iop.org/article/10.3847/1538-3881/adb1b1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Image-constrained Modeling with Hubble and Keck Images Reveals that OGLE-2012-BLG-0563Lb is a Jupiter-mass Planet Orbiting a K Dwarf
AU  - David P. Bennett
AU  - Aparna Bhattacharya
AU  - Jean-Philippe Beaulieu
AU  - Naoki Koshimoto
AU  - Joshua W. Blackman
AU  - Ian A. Bond
AU  - Clément Ranc
AU  - Natalia Rektsini
AU  - Sean K. Terry
AU  - Aikaterini Vandorou
PY  - 2026
DA  - 2026/11/03
JO  - The Astronomical Journal
DO  - 10.3847/1538-3881/adb1b1
UR  - https://iopscience.iop.org/article/10.3847/1538-3881/adb1b1
AB  - We present high-angular-resolution imaging from the Hubble Space Telescope combined with adaptive optics imaging results from the Keck-II telescope to determine the mass of the OGLE-2012-BLG-0563L host star and planet to be M host = 0.801 ± 0.033 M ⊙ and M planet = 1.116 ± 0.087 M Jupiter , respectively, located at a distance of D L = 5.46 ± 0.56 kpc. There is a close–wide degeneracy in the light-curve models that indicates a star–planet projected separation of 1.50 ± 0.16 au for the close model and 8.41 ± 0.87 au for the wide model. We used the image-constrained modeling method to analyze the light-curve data with constraints from the high-angular-resolution image analysis. This revealed systematic errors in some of the ground-based light-curve photometry, which led to an estimate of the angular Einstein Radius, θ E , that was too large by a factor of ∼2. The host star mass is a factor of 2.4 larger than the value presented in the A. Fukui et al. discovery paper. Although most systematic photometry errors seen in ground-based microlensing light-curve photometry will not be repeated in data from the Roman Space Telescope’s Galactic Bulge Time Domain Survey, we argue that image-constrained modeling will be a valuable method for identifying possible systematic errors in Roman photometry.
SN  - 0004-6256
SN  - 1538-3881
ER  -