TOI-4504 : exceptionally large transit timing variations induced by two resonant warm gas giants in a three-planet system
We present a joint analysis of transit timing variations (TTVs) and Doppler data for the transiting exoplanet system TOI-4504. TOI-4504 c is a warm Jupiter-mass planet that exhibits the largest known TTVs, with a peak-to-node amplitude of ∼2 days, the largest value ever observed, and a superperiod o...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2025 January 3
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| In: |
The astrophysical journal. Part 2, Letters
Year: 2025, Jahrgang: 978, Heft: 2, Pages: L22-1-L22-16 |
| ISSN: | 2041-8213 |
| DOI: | 10.3847/2041-8213/ad9a53 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.3847/2041-8213/ad9a53
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| Verfasserangaben: | Michaela Vítková, Rafael Brahm, Trifon Trifonov, Petr Kabáth, Andrés Jordán, Thomas Henning, Melissa J. Hobson, Jan Eberhardt, Marcelo Tala Pinto, Felipe I. Rojas, Nestor Espinoza, Martin Schlecker, Matías I. Jones, Maximiliano Moyano, Susana Eyheramendy, Carl Ziegler, Jack J. Lissauer, Andrew Vanderburg, Karen A. Collins, Bill Wohler, David Watanabe, George R. Ricker, Roland Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, and Marek Skarka |
MARC
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| 245 | 1 | 0 | |a TOI-4504 : exceptionally large transit timing variations induced by two resonant warm gas giants in a three-planet system |c Michaela Vítková, Rafael Brahm, Trifon Trifonov, Petr Kabáth, Andrés Jordán, Thomas Henning, Melissa J. Hobson, Jan Eberhardt, Marcelo Tala Pinto, Felipe I. Rojas, Nestor Espinoza, Martin Schlecker, Matías I. Jones, Maximiliano Moyano, Susana Eyheramendy, Carl Ziegler, Jack J. Lissauer, Andrew Vanderburg, Karen A. Collins, Bill Wohler, David Watanabe, George R. Ricker, Roland Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, and Marek Skarka |
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| 520 | |a We present a joint analysis of transit timing variations (TTVs) and Doppler data for the transiting exoplanet system TOI-4504. TOI-4504 c is a warm Jupiter-mass planet that exhibits the largest known TTVs, with a peak-to-node amplitude of ∼2 days, the largest value ever observed, and a superperiod of 930 days. TOI-4504 b and c were identified in public Transiting Exoplanet Survey Satellite (TESS) data, while the TTVs observed in TOI-4504 c, together with radial velocity (RV) data collected with FEROS, allowed us to uncover a third, nontransiting planet in this system, TOI-4504 d. We were able to detect transits of TOI-4504 b in the TESS data with a period of 2.4261 ± 0.0001 days and derive a radius of 2.69 ± 0.19 R⊕. The RV scatter of TOI-4504 was too large to constrain the mass of TOI-4504 b, but the RV signals of TOI-4504 c and d were sufficiently large to measure their masses. The TTV+RV dynamical model we apply confirms TOI-4504 c as a warm Jupiter planet with an osculating period of 82.54 ± 0.02 days, a mass of 3.77 ± 0.18 MJ, and a radius of 0.99 ± 0.05 RJ, while the nontransiting planet TOI-4504 d has an orbital period of 40.56 ± 0.04 days and a mass of 1.42 MJ. We present the discovery of a system with three exoplanets: a hot sub-Neptune and two warm Jupiter planets. The gas giant pair is stable and likely locked in a first-order 2:1 mean-motion resonance (MMR). The TOI-4504 system is an important addition to MMR pairs, whose increasing occurrence supports a smooth migration into a resonant configuration during the protoplanetary disk phase. | ||
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