TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit
Article
Zhou, George and Huang, Chelsea X.. 2023. "TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit." The Astrophysical Journal Letters. 951 (2). https://doi.org/10.3847/2041-8213/acd93d
Article Title | TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Zhou, George and Huang, Chelsea X. |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 951 (2) |
Article Number | L29 |
Number of Pages | 12 |
Year | 2023 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/acd93d |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/acd93d |
Abstract | Warm Jupiters are close-in giant planets with relatively large planet-star separations (i.e., 10 < a/R ? < 100). Given their weak tidal interactions with their host stars, measurements of stellar obliquity may be used to probe the initial obliquity distribution and dynamical history for close-in gas giants. Using spectroscopic observations, we confirm the planetary nature of TOI-1859b and determine the stellar obliquity of TOI-1859 to be ? = 38.9 ? 2.7 + 2.8 ° relative to its planetary companion using the Rossiter-McLaughlin effect. TOI-1859b is a 64 day warm Jupiter orbiting around a late F dwarf and has an orbital eccentricity of 0.57 ? 0.16 + 0.12 inferred purely from transit light curves. The eccentric and misaligned orbit of TOI-1859b is likely an outcome of dynamical interactions, such as planet-planet scattering and planet-disk resonance crossing. © 2023. The Author(s). Published by the American Astronomical Society. |
Keywords | Extrasolar gaseous giant planets; Radial velocity ; Exoplanet dynamics ; Transit photometry |
ANZSRC Field of Research 2020 | 510199. Astronomical sciences not elsewhere classified |
Byline Affiliations | Centre for Astrophysics |
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https://research.usq.edu.au/item/z25q5/toi-1859b-a-64-day-warm-jupiter-on-an-eccentric-and-misaligned-orbit
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