Published 2023
| Version v1
Journal article
TOI-4562b: A Highly Eccentric Temperate Jupiter Analog Orbiting a Young Field Star
Creators
- Heitzmann, Alexis
- Zhou, George
- Quinn, Samuel N.
- Huang, Chelsea X.
- Dong, Jiayin
- Bouma, L. G.
- Dawson, Rebekah I.
- Marsden, Stephen C.
- Wright, Duncan
- Petit, Pascal
- Collins, Karen A.
- Barkaoui, Khalid
- Wittenmyer, Robert A.
- Gillen, Edward
- Brahm, Rafael
- Hobson, Melissa
- Hellier, Coel
- Ziegler, Carl
- Briceño, César
- Law, Nicholas
- Mann, Andrew W.
- Howell, Steve B.
- Gnilka, Crystal L.
- Littlefield, Colin
- Latham, David W.
- Lissauer, Jack J.
- Newton, Elisabeth R.
- Krolikowski, Daniel M.
- Kerr, Ronan
- Rampalli, Rayna
- Douglas, Stephanie T.
- Eisner, Nora L.
- Guedj, Nathalie
- Sun, Guoyou
- Smit, Martin
- Huten, Marc
- Eschweiler, Thorsten
- Abe, Lyu
- Guillot, Tristan
- Ricker, George
- Vanderspek, Roland
- Seager, Sara
- Jenkins, Jon M.
- Ting, Eric B.
- Winn, Joshua N.
- Ciardi, David R.
- Vanderburg, Andrew M.
- Burke, Christopher J.
- Rodriguez, David R.
- Daylan, Tansu
Contributors
Others:
- Institut de recherche en astrophysique et planétologie (IRAP) ; Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)
- Observatoire de la Côte d'Azur (OCA) ; Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Description
We report the discovery of TOI-4562b (TIC-349576261), a Jovian planet orbiting a young F7V-type star, younger than the Praesepe/Hyades clusters (<700 Myr). This planet stands out because of its unusually long orbital period for transiting planets with known masses (P orb = 225.11781 ${}_{-0.00022}^{+0.00025}$ days) and because it has a substantial eccentricity (e = 0.76 ${}_{-0.02}^{+0.02}$ ). The location of TOI-4562 near the southern continuous viewing zone of TESS allowed observations throughout 25 sectors, enabling an unambiguous period measurement from TESS alone. Alongside the four available TESS transits, we performed follow-up photometry using the South African Astronomical Observatory node of the Las Cumbres Observatory and spectroscopy with the CHIRON spectrograph on the 1.5 m SMARTS telescope. We measure a radius of ${1.118}_{+0.013}^{-0.014}$ R J and a mass of 2.30 ${}_{-0.47}^{+0.48}$ M J for TOI-4562b. The radius of the planet is consistent with contraction models describing the early evolution of the size of giant planets. We detect tentative transit timing variations at the ~20 minutes level from five transit events, favoring the presence of a companion that could explain the dynamical history of this system if confirmed by future follow-up observations. With its current orbital configuration, tidal timescales are too long for TOI-4562b to become a hot Jupiter via high-eccentricity migration though it is not excluded that interactions with the possible companion could modify TOI-4562b's eccentricity and trigger circularization. The characterization of more such young systems is essential to set constraints on models describing giant-planet evolution.
Abstract
International audienceAdditional details
Identifiers
- URL
- https://insu.hal.science/insu-04473215
- URN
- urn:oai:HAL:insu-04473215v1
Origin repository
- Origin repository
- UNICA