Precise mass measurement of OGLE-2013-BLG-0132/MOA-2013-BLG-148: a Saturn mass planet orbiting an M-dwarf
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Rektsini, Natalia E. Batista, Virginie Ranc, Clement Bennett, David P. Beaulieu, Jean-Philippe Blackman, Joshua W. Cole, Andrew A. Terry, Sean K. Koshimoto, Naoki Bhattacharya, Aparna Vandorou, Aikaterini Plunkett, Thomas J. Marquette, Jean-Baptiste |
| author_facet | Rektsini, Natalia E. Batista, Virginie Ranc, Clement Bennett, David P. Beaulieu, Jean-Philippe Blackman, Joshua W. Cole, Andrew A. Terry, Sean K. Koshimoto, Naoki Bhattacharya, Aparna Vandorou, Aikaterini Plunkett, Thomas J. Marquette, Jean-Baptiste |
| contents | We revisit the planetary microlensing event OGLE-2013-BLG-0132/MOA-2013-BLG-148 using Keck adaptive optics imaging in 2013 with NIRC2 and in 2020, 7.4 years after the event, with OSIRIS. The 2020 observations yield a source and lens separation of $ 56.91 \pm 0.29$ mas, which provides us with a precise measurement of the heliocentric proper motion of the event $μ_{rel,hel} = 7.695 \pm 0.039$ mas $yr^{-1}$. We measured the magnitude of the lens in K-band as $K_{lens} = 18.69 \pm 0.04 $. Using these constraints, we refit the microlensing light curve and undertake a full reanalysis of the event parameters including the microlensing parallax $π_{E}$ and the distance to the source D$_S$. We confirm the results obtained in the initial study by \cite{Mroz_2017} and improve significantly upon the accuracy of the physical parameters. The system is an M dwarf of $0.495 \pm 0.054$ $M_\odot$ orbited by a cold, Saturn-mass planet of $0.26 \pm 0.028$ $M_{Jup}$ at projected separation $r_{\perp}$ = 3.14 $\pm$ 0.28 AU. This work confirms that the planetary system is at a distance of 3.48 $\pm$ 0.36 kpc, which places it in the Galactic disk and not the Galactic bulge. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_17549 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Precise mass measurement of OGLE-2013-BLG-0132/MOA-2013-BLG-148: a Saturn mass planet orbiting an M-dwarf Rektsini, Natalia E. Batista, Virginie Ranc, Clement Bennett, David P. Beaulieu, Jean-Philippe Blackman, Joshua W. Cole, Andrew A. Terry, Sean K. Koshimoto, Naoki Bhattacharya, Aparna Vandorou, Aikaterini Plunkett, Thomas J. Marquette, Jean-Baptiste Earth and Planetary Astrophysics Astrophysics of Galaxies We revisit the planetary microlensing event OGLE-2013-BLG-0132/MOA-2013-BLG-148 using Keck adaptive optics imaging in 2013 with NIRC2 and in 2020, 7.4 years after the event, with OSIRIS. The 2020 observations yield a source and lens separation of $ 56.91 \pm 0.29$ mas, which provides us with a precise measurement of the heliocentric proper motion of the event $μ_{rel,hel} = 7.695 \pm 0.039$ mas $yr^{-1}$. We measured the magnitude of the lens in K-band as $K_{lens} = 18.69 \pm 0.04 $. Using these constraints, we refit the microlensing light curve and undertake a full reanalysis of the event parameters including the microlensing parallax $π_{E}$ and the distance to the source D$_S$. We confirm the results obtained in the initial study by \cite{Mroz_2017} and improve significantly upon the accuracy of the physical parameters. The system is an M dwarf of $0.495 \pm 0.054$ $M_\odot$ orbited by a cold, Saturn-mass planet of $0.26 \pm 0.028$ $M_{Jup}$ at projected separation $r_{\perp}$ = 3.14 $\pm$ 0.28 AU. This work confirms that the planetary system is at a distance of 3.48 $\pm$ 0.36 kpc, which places it in the Galactic disk and not the Galactic bulge. |
| title | Precise mass measurement of OGLE-2013-BLG-0132/MOA-2013-BLG-148: a Saturn mass planet orbiting an M-dwarf |
| topic | Earth and Planetary Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2401.17549 |