Reference : TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/263313
TOI-674b: An oasis in the desert of exo-Neptunes transiting a nearby M dwarf
English
Murgas, F. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Astudillo-Defru, N. [Departamento de Matemática y Física Aplicadas, Universidad Católica de la Santísima Concepción, Alonso de Rivera 2850, Concepción, Chile]
Bonfils, X. [Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France]
Crossfield, I. [Department of Physics and Astronomy, University of Kansas, Lawrence, KS, USA]
Almenara, J. M. [Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France]
Livingston, J. [Department of Astronomy, University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan]
Stassun, K. G. [Vanderbilt University, Department of Physics & Astronomy, 6301 Stevenson Center Ln., Nashville, TN 37235, USA]
Korth, J. [Department of Space, Earth and Environment, Astronomy and Plasma Physics, Chalmers University of Technology, 412 96, Gothenburg, Sweden]
Orell-Miquel, J. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Morello, G. [Instituto de Astrofísica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, Spain]
Eastman, J. D. [Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA]
Lissauer, J. J. [NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Kane, S. R. [Department of Earth and Planetary Sciences, University of California, Riverside, CA 92521, USA]
Morales, F. Y. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA]
Werner, M. W. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA]
Gorjian, V. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA]
Benneke, B. [Université de Montréal, Département de Physique & Institut de Recherche sur les Exoplanètes, Montréal, QC H3C 3J7, Canada]
Dragomir, D. [Department of Physics and Astronomy, University of New Mexico, 210 Yale Blvd NE, Albuquerque, NM 87106, USA]
Matthews, E. C. [Observatoire de l'Université de Genève, Chemin des Maillettes 51, 1290, Versoix, Switzerland]
Howell, S. B. [NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Ciardi, D. [Caltech/IPAC, 1200 E. California Blvd. Pasadena, CA 91125, USA]
Gonzales, E. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA]
Matson, R. [U.S. Naval Observatory, Washington, DC 20392, USA]
Beichman, C. [Caltech/IPAC, 1200 E. California Blvd. Pasadena, CA 91125, USA]
Schlieder, J. [NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA]
Collins, K. A. [Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA]
Collins, K. I. [George Mason University, 4400 University Drive, Fairfax, VA, 22030, USA]
Jensen, E. L. N. [Department of Physics & Astronomy, Swarthmore College, Swarthmore, PA, 19081, USA]
Evans, P. [El Sauce Observatory, Coquimbo Province, Chile]
Pozuelos, F. J. [Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19C Allée du 6 Août, 4000, Liège, Belgium; Astrobiology Research Unit, Université de Liège, 19C Allée du 6 Août, 4000, Liège, Belgium]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Barkaoui, Khalid [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Artigau, E. [Université de Montréal, Département de Physique & Institut de Recherche sur les Exoplanètes, Montréal, QC H3C 3J7, Canada]
Bouchy, F. [Observatoire de l'Université de Genève, Chemin des Maillettes 51, 1290, Versoix, Switzerland]
Charbonneau, D. [Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA]
Delfosse, X. [Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France]
Díaz, R. F. [International Center for Advanced Studies (ICAS) and ICIFI(CONICET), ECyT-UNSAM, Campus Miguelete, 25 de Mayo y Francia (1650), Buenos Aires, Argentina]
Doyon, R. [Université de Montréal, Département de Physique & Institut de Recherche sur les Exoplanètes, Montréal, QC H3C 3J7, Canada]
Figueira, P. [European Southern Observatory, Alonso de Córdova 3107, Vitacura, Región Metropolitana, Chile; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, Portugal]
Forveille, T. [Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France]
Lovis, C. [Observatoire de l'Université de Genève, Chemin des Maillettes 51, 1290, Versoix, Switzerland]
Melo, C. [European Southern Observatory, Alonso de Córdova 3107, Vitacura, Región Metropolitana, Chile]
Gaisné, G. [Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France]
Pepe, F. [Observatoire de l'Université de Genève, Chemin des Maillettes 51, 1290, Versoix, Switzerland]
Santos, N. C. [Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, Portugal; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal]
Ségransan, D. [Observatoire de l'Université de Genève, Chemin des Maillettes 51, 1290, Versoix, Switzerland]
Udry, S. [Observatoire de l'Université de Genève, Chemin des Maillettes 51, 1290, Versoix, Switzerland]
Goeke, R. F. [Department of Aeronautics and Astronautics, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA]
Levine, A. M. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Quintana, E. V. [NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA]
Guerrero, N. M. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Mireles, I. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Caldwell, D. A. [SETI Institute, 189 Bernardo Ave, Suite 200, Mountain View, CA 94043, USA; NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Tenenbaum, P. [SETI Institute, 189 Bernardo Ave, Suite 200, Mountain View, CA 94043, USA; NASA Ames Research Center, Moffett Field, CA, 94035, USA]
Brasseur, C. E. [Space Telescope Science Institute, Baltimore, MD 21218, USA]
Ricker, G. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Vanderspek, R. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Latham, D. W. [Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA]
Seager, S. [Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Aeronautics and Astronautics, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA]
Winn, J. [Department of Astrophysical Sciences, Princeton University, NJ, 08544, USA]
Jenkins, J. M. [NASA Ames Research Center, Moffett Field, CA, 94035, USA)]
1-Sep-2021
Astronomy and Astrophysics
EDP Sciences
653
A60
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] planets and satellites: general ; planets and satellites: gaseous planets ; stars: individual: TOI-674 ; techniques: photometric ; techniques: radial velocities ; Astrophysics - Earth and Planetary Astrophysics ; Astrophysics - Solar and Stellar Astrophysics
[en] Context. The NASA mission TESS is currently doing an all-sky survey from space to detect transiting planets around bright stars. As part of the validation process, the most promising planet candidates need to be confirmed and characterized using follow-up observations. Aims: In this article, our aim is to confirm the planetary nature of the transiting planet candidate TOI-674b using spectroscopic and photometric observations. Methods: We use TESS, Spitzer, ground-based light curves, and HARPS spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate TOI-674b. We perform a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate. Results: We confirm and characterize TOI-674b, a low-density super-Neptune transiting a nearby M dwarf. The host star (TIC 158588995, V = 14.2 mag, J = 10.3 mag) is characterized by its M2V spectral type with M⋆ = 0.420 ± 0.010 M⊙, R⋆ = 0.420 ± 0.013 R⊙, and Teff = 3514 ± 57 K; it is located at a distance d = 46.16 ± 0.03 pc. Combining the available transit light curves plus radial velocity measurements and jointly fitting a circular orbit model, we find an orbital period of 1.977143 ± 3 × 10^−6 days, a planetary radius of 5.25 ± 0.17 R⊕, and a mass of 23.6 ± 3.3 M⊕ implying a mean density of ρ_p =0.91 ± 0.15 g cm^−3. A non-circular orbit model fit delivers similar planetary mass and radius values within the uncertainties. Given the measured planetary radius and mass, TOI-674b is one of the largest and most massive super-Neptune class planets discovered around an M-type star to date. It is found in the Neptunian desert, and is a promising candidate for atmospheric characterization using the James Webb Space Telescope.
Professionals
http://hdl.handle.net/2268/263313
10.1051/0004-6361/202140718
https://ui.adsabs.harvard.edu/abs/2021A&A...653A..60M

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