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Near-resonance in a System of Sub-Neptunes from TESS
dc.contributor.author | Quin, Samuel N. | |
dc.contributor.author | Crossfield, Ian | |
dc.date.accessioned | 2020-12-23T20:24:04Z | |
dc.date.available | 2020-12-23T20:24:04Z | |
dc.date.issued | 2019-10-10 | |
dc.identifier.citation | Samuel N. Quinn et al 2019 AJ 158 177 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/31007 | |
dc.description.abstract | 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. | en_US |
dc.publisher | IOP Publishing | en_US |
dc.rights | © 2019. The American Astronomical Society. All rights reserved. | en_US |
dc.subject | Transit photometry | en_US |
dc.subject | Mini Neptunes | en_US |
dc.subject | Super Earths | en_US |
dc.subject | Exoplanets | en_US |
dc.title | Near-resonance in a System of Sub-Neptunes from TESS | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Crossfield, Ian | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.3847/1538-3881/ab3f2b | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-8964-8377 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |