The TESS-Keck Survey. XV. Precise Properties of 108 TESS Planets and Their Host Stars
Article
Isaacson, Howard. 2023. "The TESS-Keck Survey. XV. Precise Properties of 108 TESS Planets and Their Host Stars." The Astronomical Journal. 166 (1). https://doi.org/10.3847/1538-3881/acd557
Article Title | The TESS-Keck Survey. XV. Precise Properties of 108 TESS Planets and Their Host Stars |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Isaacson, Howard |
Journal Title | The Astronomical Journal |
Journal Citation | 166 (1) |
Number of Pages | 17 |
Year | 2023 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/acd557 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/acd557 |
Abstract | We present the stellar and planetary properties for 85 TESS Objects of Interest (TOIs) hosting 108 planet candidates that compose the TESS-Keck Survey (TKS) sample. We combine photometry, high-resolution spectroscopy, and Gaia parallaxes to measure precise and accurate stellar properties. We then use these parameters as inputs to a light-curve processing pipeline to recover planetary signals and homogeneously fit their transit properties. Among these transit fits, we detect significant transit-timing variations among at least three multiplanet systems (TOI-1136, TOI-1246, TOI-1339) and at least one single-planet system (TOI-1279). We also reduce the uncertainties on planet-to-star radius ratios Rp/R⋆ across our sample, from a median fractional uncertainty of 8.8% among the original TOI Catalog values to 3.0% among our updated results. With this improvement, we are able to recover the Radius Gap among small TKS planets and find that the topology of the Radius Gap among our sample is broadly consistent with that measured among Kepler planets. The stellar and planetary properties presented here will facilitate follow-up investigations of both individual TOIs and broader trends in planet properties, system dynamics, and the evolution of planetary systems. |
Keywords | Exoplanets ; Transit timing variation method; Exoplanet catalogs; Stellar properties ; Transit photometry |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | Centre for Astrophysics |
University of California Berkeley, United States |
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