Near-resonance in a System of Sub-Neptunes from TESS
We report the Transiting Exoplanet Survey Satellite detection of a multi-planet system orbiting the V = 10.9 K0 dwarf TOI-125. We find evidence for up to five planets, with varying confidence. Three transit signals with high signal-to-noise ratio correspond to sub-Neptune-sized planets (2.76, 2.79,...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Astronomical Society
2020
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| Online Access: | https://hdl.handle.net/1721.1/124708 |
| _version_ | 1811071949827211264 |
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| author | Huang, Chelsea Ricker, George R. Vanderspek, Roland K. Seager, Sara Crossfield, Ian Daylan, Tansu Dittmann, Jason A. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Huang, Chelsea Ricker, George R. Vanderspek, Roland K. Seager, Sara Crossfield, Ian Daylan, Tansu Dittmann, Jason A. |
| author_sort | Huang, Chelsea |
| collection | MIT |
| description | We report the Transiting Exoplanet Survey Satellite detection of a multi-planet system orbiting the V = 10.9 K0 dwarf TOI-125. We find evidence for up to five planets, with varying confidence. Three transit signals with high signal-to-noise ratio correspond to sub-Neptune-sized planets (2.76, 2.79, and 2.94 R ⊕), and we statistically validate the planetary nature of the two inner planets (P b = 4.65 days, P c = 9.15 days). With only two transits observed, we report the outer object (P .03 = 19.98 days) as a planet candidate with high signal-to-noise ratio. We also detect a candidate transiting super-Earth (1.4 R ⊕) with an orbital period of only 12.7 hr and a candidate Neptune-sized planet (4.2 R ⊕) with a period of 13.28 days, both at low signal-to-noise ratio. This system is amenable to mass determination via radial velocities and transit-timing variations, and provides an opportunity to study planets of similar size while controlling for age and environment. The ratio of orbital periods between TOI-125 b and c (P c /P b = 1.97) is slightly lower than an exact 2:1 commensurability and is atypical of multiple planet systems from Kepler, which show a preference for period ratios just wide of first-order period ratios. A dynamical analysis refines the allowed parameter space through stability arguments and suggests that despite the nearly commensurate periods, the system is unlikely to be in resonance. ©2019 |
| first_indexed | 2024-09-23T08:58:31Z |
| format | Article |
| id | mit-1721.1/124708 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:58:31Z |
| publishDate | 2020 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1247082022-09-26T09:35:06Z Near-resonance in a System of Sub-Neptunes from TESS Huang, Chelsea Ricker, George R. Vanderspek, Roland K. Seager, Sara Crossfield, Ian Daylan, Tansu Dittmann, Jason A. Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research We report the Transiting Exoplanet Survey Satellite detection of a multi-planet system orbiting the V = 10.9 K0 dwarf TOI-125. We find evidence for up to five planets, with varying confidence. Three transit signals with high signal-to-noise ratio correspond to sub-Neptune-sized planets (2.76, 2.79, and 2.94 R ⊕), and we statistically validate the planetary nature of the two inner planets (P b = 4.65 days, P c = 9.15 days). With only two transits observed, we report the outer object (P .03 = 19.98 days) as a planet candidate with high signal-to-noise ratio. We also detect a candidate transiting super-Earth (1.4 R ⊕) with an orbital period of only 12.7 hr and a candidate Neptune-sized planet (4.2 R ⊕) with a period of 13.28 days, both at low signal-to-noise ratio. This system is amenable to mass determination via radial velocities and transit-timing variations, and provides an opportunity to study planets of similar size while controlling for age and environment. The ratio of orbital periods between TOI-125 b and c (P c /P b = 1.97) is slightly lower than an exact 2:1 commensurability and is atypical of multiple planet systems from Kepler, which show a preference for period ratios just wide of first-order period ratios. A dynamical analysis refines the allowed parameter space through stability arguments and suggests that despite the nearly commensurate periods, the system is unlikely to be in resonance. ©2019 NSF (grant no. AST-1824644) 2020-04-17T02:05:18Z 2020-04-17T02:05:18Z 2019-11 2020-04-09T16:39:51Z Article http://purl.org/eprint/type/JournalArticle 1538-3881 https://hdl.handle.net/1721.1/124708 Quinn, Samuel N., et al.,"Near-resonance in a System of Sub-Neptunes from TESS." Astronomical Journal 158, 5 (November 2019): no. 177 doi 10.3847/1538-3881/AB3F2B ©2019 Author(s) en 10.3847/1538-3881/AB3F2B Astronomical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Astronomical Society The American Astronomical Society |
| spellingShingle | Huang, Chelsea Ricker, George R. Vanderspek, Roland K. Seager, Sara Crossfield, Ian Daylan, Tansu Dittmann, Jason A. Near-resonance in a System of Sub-Neptunes from TESS |
| title | Near-resonance in a System of Sub-Neptunes from TESS |
| title_full | Near-resonance in a System of Sub-Neptunes from TESS |
| title_fullStr | Near-resonance in a System of Sub-Neptunes from TESS |
| title_full_unstemmed | Near-resonance in a System of Sub-Neptunes from TESS |
| title_short | Near-resonance in a System of Sub-Neptunes from TESS |
| title_sort | near resonance in a system of sub neptunes from tess |
| url | https://hdl.handle.net/1721.1/124708 |
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