[en] We present the discovery by the TESS mission of one transiting Neptune-sized planet, TOI-6223 b, and two transiting super-Earths, TOI-1743 b and TOI-5799 b. We validate these planets using a statistical validation method, multi-color light curves, and other ancillary observations. We combined TESS and ground-based photometric data to constrain the physical properties of the planets. TOI-6223 b is slightly larger than Neptune Rp = 5.12<SUB>‑0.25</SUB><SUP>+0.24</SUP> R⊕) orbiting an early M dwarf in 3.86 days, and it has an equilibrium temperature of Teq = 714 ± 14 K. TOI-1743 b orbits its mid-dwarf star every 4.27 days. It has a radius of Rp = 1.83<SUB>‑0.10</SUB><SUP>+0.11</SUP> R⊕ and an equilibrium temperature of Teq = 485<SUB>‑13</SUB><SUP>+14</SUP>. TOI-5799 b has a radius of Rp = 1.733<SUB>‑0.090</SUB><SUP>+0.096</SUP> R⊕ and an equilibrium temperature of Teq = 505 ± 16 K. It orbit around an M2 dwarf in 4.17 days. We also present the discovery of an additional transiting planet, TOI-5799 c, which we identified in the TESS data and validated using the SHERLOCK pipeline. TOI-5799 c is a super-Earth with a radius of Rp = 1.76<SUB>‑0.10</SUB><SUP>+0.11</SUP> R⊕. Its orbital period and its equilibrium temperature are 14.01 days and Teq = 337 ± 11 K, respectively, which place it near the inner edge of the habitable zone of its star. We show that these planets are suitable for both radial velocity follow-up and atmospheric characterization. They orbit bright (<11 Kmag) early M dwarfs, making them accessible for precise mass measurements. The combination of the planet sizes and stellar brightness of their host stars also make them suitable targets for atmospheric exploration with the JWST. Such studies may provide insights into planet formation and evolution, as TOI-1743 b, TOI-5799 b, and TOI-5799 c lie within what is known as the radius valley, while TOI-6223 b is located on the Neptunian ridge in the period-radius plane.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Yalçinkaya, Selçuk ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Barkaoui, Khalid ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Baştürk, Ö.; Department of Astronomy &, Space Sciences, Faculty of Science, Ankara University, 06100, Ankara, Türkiye, Ankara University, Astronomy and Space Sciences Research and Application Center (Kreiken Observatory), Incek Blvd., 06837, Ahlatlibel, Ankara, Türkiye,
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)
Pozuelos, F. J.; Institute of Astrophysics of Andalusia
Timmermans, Mathilde ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Rackham, B. V.; MIT, Department of Earth and Planetary Science, MIT, Center for Space Research/Kavli Institute
Burgasser, A. J.; Department of Astronomy &, Astrophysics, UC San Diego, La Jolla, CA, 92093, USA,
Mistry, P.; School of Physics, Faculty of Science, University of New South Wales, Kensington, Sydney, NSW 2052, Australia
Peláez-Torres, A.; Institute of Astrophysics of Andalusia
Morello, G.; Institute of Astrophysics of Andalusia, -
Pass, E. K.; MIT, Center for Space Research/Kavli Institute, Harvard Smithsonian Center for Astrophysics
Bieryla, A.; Harvard Smithsonian Center for Astrophysics
Latham, D. W.; Harvard Smithsonian Center for Astrophysics
Collins, K. A.; Harvard Smithsonian Center for Astrophysics
Akar, F.; Ankara University, Graduate School of Natural and Applied Sciences, Department of Astronomy and Space Sciences, Ankara, Türkiye,
Benkhaldoun, Z.; Cadi Ayyad University, Oukaimeden Observatory, High Energy Physics, Astrophysics and Geoscience Laboratory, Faculty of sciences Semlalia, Marrakech, Morocco,
Burdanov, A.; MIT, Department of Earth and Planetary Science
Brande, J.; University of Kansas, Department of Physics and Astronomy
Ciardi, D. R.; Infrared Processing and Analysis Center
Clark, C. A.; Infrared Processing and Analysis Center
Ducrot, Elsa ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization ; Paris Region Fellow, Marie Sklodowska-Curie Action, AIM, CEA, CNRS, Université Paris-Saclay, Université de Paris, 91191, Gif-sur-Yvette, France
de Wit, J.; MIT, Department of Earth and Planetary Science
Demory, B. O.; University of Bern, Switzerland
Esmer, E. M.; Department of Astronomy &, Space Sciences, Faculty of Science, Ankara University, 06100, Ankara, Türkiye, Department of Physics and McDonnell Center for the Space Sciences, Washington University, St. Louis, MO, 63130, USA,
Everett, M. E.; NSF NOIRLab, 950 N. Cherry Ave., Tucson, AZ, 85719, USA
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Fukui, A.; University of Tokyo, Japan, Astrophysical Institute of the Canaries
Ghachoui, Mourad ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > COMets METeors and Asteroids (COMETA)
Gilbert, E. A.; Jet Propulsion Laboratory
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