methods: observational; planets and satellites: detection; planets and satellites: gaseous planets; stars: fundamental parameters; techniques: photometric; techniques: radial velocities; Giant planets; Jupiters; Methods:observational; Planet and satellite: gaseous planet; Planets and satellites; Planets and satellites: detections; Property; Stars:fundamental parameters; Techniques: photometric; Techniques: radial velocities; Astronomy and Astrophysics; Space and Planetary Science
Abstract :
[en] Context. Different theories have been developed to explain the origins and properties of close-in giant planets, but none of them alone can explain all of the properties of the warm Jupiters (WJs, Porb = 10–200 days). One of the most intriguing characteristics of WJs is that they have a wide range of orbital eccentricities, challenging our understanding of their formation and evolution. Aims. The investigation of these systems is crucial in order to put constraints on formation and evolution theories. TESS is providing a significant sample of transiting WJs around stars bright enough to allow spectroscopic follow-up studies. Methods. We carried out a radial velocity (RV) follow-up study of the TESS candidate TOI-4515 b with the high-resolution spectrograph HARPS-N in the context of the GAPS project, the aim of which is to characterize young giant planets, and the TRES and FEROS spectrographs. We then performed a joint analysis of the HARPS-N, TRES, FEROS, and TESS data in order to fully characterize this planetary system. Results. We find that TOI-4515 b orbits a 1.2 Gyr-old G-star, has an orbital period of Pb = 15.266446 ± 0.000013 days, a mass of Mb = 2.01 ± 0.05 MJ, and a radius of Rb = 1.09 ± 0.04 RJ. We also find an eccentricity of e = 0.46 ± 0.01, placing this planet among the WJs with highly eccentric orbits. As no additional companion has been detected, this high eccentricity might be the consequence of past violent scattering events.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Carleo, I. ; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), Tenerife, Spain
Malavolta, L. ; Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Padova, Italy
Desidera, S. ; INAF – Osservatorio Astronomico di Padova, Padova, Italy
Nardiello, D.; Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Padova, Italy ; INAF – Osservatorio Astronomico di Padova, Padova, Italy
Wang, S. ; Astronomy Department, Indiana University, Bloomington, United States
Turrini, D.; INAF, Osservatorio Astrofisico di Torino, Pino Torinese, Italy
Lanza, A.F. ; INAF, Osservatorio Astrofisico di Catania, Catania, Italy
Baratella, M. ; Leibniz-Institut für Astrophysik Potsdam (AIP), Potsdam, Germany
Marzari, F.; Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Padova, Italy
Benatti, S. ; INAF –, Osservatorio Astronomico di Palermo, Palermo, Italy
Biazzo, K. ; INAF, Osservatorio Astrofisico di Catania, Catania, Italy
Bieryla, A.; Center for Astrophysics, Harvard & Smithsonian, Cambridge, United States
Brahm, R.; Facultad de Ingeniera y Ciencias, Universidad Adolfo Ibáñez, Santiago, Chile ; Millennium Institute for Astrophysics, Santiago, Chile ; Data Observatory Foundation, DO, Santiago, Chile
Bonavita, M.; SUPA, Institute for Astronomy, University of Edinburgh, Edinburgh, United Kingdom
Collins, K.A.; Center for Astrophysics, Harvard & Smithsonian, Cambridge, United States
Hellier, C.; Astrophysics Group, Keele University, Staffordshire, United Kingdom
Locci, D.; INAF –, Osservatorio Astronomico di Palermo, Palermo, Italy
Hobson, M.J.; Millennium Institute for Astrophysics, Santiago, Chile ; Max-Planck-Institut für Astronomie, Heidelberg, Germany
Maggio, A.; INAF –, Osservatorio Astronomico di Palermo, Palermo, Italy
Mantovan, G. ; Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Padova, Italy
Messina, S.; INAF, Osservatorio Astrofisico di Catania, Catania, Italy
Pinamonti, M. ; INAF, Osservatorio Astrofisico di Torino, Pino Torinese, Italy
Rodriguez, J.E.; Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University, East Lansing, United States
Sozzetti, A.; INAF, Osservatorio Astrofisico di Torino, Pino Torinese, Italy
Stassun, K. ; Department of Physics & Astronomy, Vanderbilt University, Nashville, United States
Wang, X.Y.; Astronomy Department, Indiana University, Bloomington, United States
Ziegler, C.; Department of Physics, Engineering and Astronomy, Stephen F. Austin State University, Nacogdoches, United States
Damasso, M.; INAF, Osservatorio Astrofisico di Torino, Pino Torinese, Italy
Giacobbe, P.; INAF, Osservatorio Astrofisico di Torino, Pino Torinese, Italy
Murgas, F. ; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), Tenerife, Spain
Parviainen, H.; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), Tenerife, Spain
Andreuzzi, G.; Fundación Galileo Galilei-INAF, Breña Baja, Spain ; INAF, Osservatorio Astronomico di Roma, Monte Porzio Catone, Italy
Barkaoui, Khalid ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization ; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain ; Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, United States
Berlind, P.; Center for Astrophysics, Harvard & Smithsonian, Cambridge, United States
Bignamini, A. ; INAF –, Osservatorio Astronomico di Trieste, Trieste, Italy
Borsa, F.; INAF, Osservatorio Astronomico di Brera, Merate, Italy
Goeke, R.F.; Department of Physics, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States
Gratton, R.; INAF – Osservatorio Astronomico di Padova, Padova, Italy
Horta, F. Grau ; Observatori de Ca l’Ou, Barcelona, Spain
Gupta, A.F.; Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University, University Park, United States ; Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University, University Park, United States
Jenkins, J.M. ; NASA Ames Research Center, Moffett Field, United States
Jordán, A.; Facultad de Ingeniera y Ciencias, Universidad Adolfo Ibáñez, Santiago, Chile ; Millennium Institute for Astrophysics, Santiago, Chile ; Data Observatory Foundation, DO, Santiago, Chile
Knapic, C. ; INAF –, Osservatorio Astronomico di Trieste, Trieste, Italy
Latham, D.W. ; Center for Astrophysics, Harvard & Smithsonian, Cambridge, United States
Mireles, I.; Department of Physics and Astronomy, University of New Mexico, Albuquerque, United States
Law, N.; Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, United States
Lorenzi, V.; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain ; Fundación Galileo Galilei-INAF, Breña Baja, Spain
Lund, M.B.; NASA Exoplanet Science Institute, IPAC, California Institute of Technology, Pasadena, United States
Maldonado, J. ; INAF –, Osservatorio Astronomico di Palermo, Palermo, Italy
Mann, A.W.; NASA Exoplanet Science Institute, IPAC, California Institute of Technology, Pasadena, United States
Molinari, E.; INAF, Osservatorio Astronomico di Brera, Merate, Italy
Pallé, E.; Instituto de Astrofísica de Canarias (IAC), Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), Tenerife, Spain
Paegert, M.; Center for Astrophysics, Harvard & Smithsonian, Cambridge, United States
Pedani, M.; Fundación Galileo Galilei-INAF, Breña Baja, Spain
Quinn, S.N.; Center for Astrophysics, Harvard & Smithsonian, Cambridge, United States
Scandariato, G. ; INAF, Osservatorio Astrofisico di Catania, Catania, Italy
Seager, S.; Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, United States ; Department of Physics, Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States ; Department of Aeronautics and Astronautics, MIT, Cambridge, United States
Winn, J.N. ; Department of Astrophysical Sciences, Princeton University, Princeton, United States
Wohler, B.; NASA Ames Research Center, Moffett Field, United States ; SETI Institute, Mountain View, United States
Zingales, T.; Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Padova, Italy
This work has been supported by the PRIN-INAF 2019 “Planetary systems at young ages (PLATEA)” and ASI-INAF agreements no. 2018-16-HH.0 and 2021-5-HH.0. This work made use of tpfplotter by J. Lillo-Box (publicly available in www.github.com/jlillo/tpfplotter ), which also made use of the python packages astropy, lightkurve, matplotlib and numpy . Some of the observations in this paper made use of the NN-EXPLORE Exoplanet and Stellar Speckle Imager (NESSI). NESSI was funded by the NASA Exoplanet Exploration Program and the NASA Ames Research Center. NESSI was built at the Ames Research Center by Steve B. Howell, Nic Scott, Elliott P. Horch, and Emmett Quigley. This work makes use of observations from the LCOGT network. This research has made use of the Exoplanet Follow-up Observation Program (ExoFOP; DOI: 10.26134/ExoFOP5) website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. We acknowledge the use of public TESS data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. Funding for the TESS mission is provided by NASA’s Science Mission Directorate. K.A.C. acknowledges support from the TESS mission via subaward s3449 from MIT. D.D. acknowledges support from the NASA Exoplanet Research Program grant 18-2XRP18_2-0136. Based in part on observations obtained at the Southern Astrophysical Research (SOAR) telescope, which is a joint project of the Ministério da Ciência, Tecnologia e Inovações (MCTI/LNA) do Brasil, the US National Science Foundation’s NOIRLab, the University of North Carolina at Chapel Hill (UNC), and Michigan State University (MSU). A.J. acknowledges support from ANID – Millennium Science Initiative – ICN12_009 and from FONDECYT project 1210718. R.B. acknowledges support ANID – Millennium Science Initiative – ICN12_009 and from FONDECYT project 11200751. S.Q. acknowledges support from the TESS GI Program under award 80NSSC21K1056 and from the TESS mission via subaward s3449 from MIT. D.D. acknowledges support from the NASA Exoplanet Research Program grant 18-2XRP18_2-0136, and from the TESS Guest Investigator Program grants 80NSSC22K1353 and 80NSSC22K0185. S.W. gratefully acknowledges the generous support from the Heising-Simons Foundation, including support from Grant 2023-4050.
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