Origins of Super Jupiters: TOI-2145b has a Moderately Eccentric and Nearly Aligned Orbit
Article
Dong, Jiayin, Chontos, Ashley, Zhou, George, Stefánsson, Gudmundur, Wang, Songhu, Huang, Chelsea X., Gupta, Arvind F., Halverson, Samuel, Kanodia, Shubham, Luhn, Jacob K., Mahadevan, Suvrath, Monson, Andrew, Alvarado-Montes, Jaime A., Ninan, Joe P., Robertson, Paul, Roy, Arpita, Schwab, C. and Wright, Jason T.. 2025. "Origins of Super Jupiters: TOI-2145b has a Moderately Eccentric and Nearly Aligned Orbit." The Astronomical Journal. 169 (1). https://doi.org/10.3847/1538-3881/ad8ec1
Article Title | Origins of Super Jupiters: TOI-2145b has a Moderately Eccentric and Nearly Aligned Orbit |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Dong, Jiayin, Chontos, Ashley, Zhou, George, Stefánsson, Gudmundur, Wang, Songhu, Huang, Chelsea X., Gupta, Arvind F., Halverson, Samuel, Kanodia, Shubham, Luhn, Jacob K., Mahadevan, Suvrath, Monson, Andrew, Alvarado-Montes, Jaime A., Ninan, Joe P., Robertson, Paul, Roy, Arpita, Schwab, C. and Wright, Jason T. |
Journal Title | The Astronomical Journal |
Journal Citation | 169 (1) |
Article Number | 4 |
Number of Pages | 10 |
Year | 2025 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ad8ec1 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ad8ec1 |
Abstract | Super Jupiters are giant planets with several Jupiter masses. It remains an open question whether these planets originate with such high masses or grow through collisions. Previous work demonstrates that warm super Jupiters tend to have more eccentric orbits compared to regular-mass warm Jupiters. This correlation between mass and eccentricity may indicate that planet-planet interactions significantly influence the warm giant planet demographics. Here, we conducted a detailed characterization of a warm super Jupiter, TOI-2145b. This analysis utilized previous observations from Transiting Exoplanet Survey Satellite and Keck/High Resolution Echelle Spectrometer, enhanced by new Rossiter-McLaughlin effect data from the NEID spectrometer on the 3.5 m WIYN Telescope. TOI-2145b is a 5.68-0.34+0.37 M Jup planet on a moderate eccentricity (e = 0.214-0.014+0.014 ), 10.26 day orbit, orbiting an evolved A-star. We constrain the projected stellar obliquity to be lambda = 6.8-3.8+2.9 degrees from two NEID observations. Our N-body simulations suggest that the formation of super Jupiter TOI-2145b could involve either of two scenarios: a high initial mass or growth via collisions. On a population level, however, the collision scenario can better describe the mass-eccentricity distribution of observed warm Jupiters. |
Keywords | Transits; Exoplanets; Exoplanet formation |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | Flatiron Institute, United States |
University of Illinois Urbana-Champaign, United States | |
Princeton University, United States | |
Centre for Astrophysics | |
University of Amsterdam, Netherlands | |
Indiana University Bloomington, United States | |
National Science Foundation, United States | |
California Institute of Technology (Caltech), United States | |
Carnegie Science Earth and Planets Laboratory, United States | |
University of California Irvine, United States | |
University Park, United States | |
University of Arizona, United States | |
Macquarie University | |
Astrophysics & Space Institute, United States |
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