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TOI-220 b: a warm sub-Neptune discovered by TESS

Hoyer, S. and Gandolfi, D. and Armstrong, D. J. and Deleuil, M. and de Medeiros, J.R. and Goffo, E. and Lillo-Box, J. and Delgado Mena, E. and Lopez, Théo A. and Santerne, A. and Sousa, S. G. and Fridlund, M. and Adibekyan, V. and Collins, K. A. and Serrano, L.M. and Cortés-Zuleta, Pía and Howell, S.B. and Deeg, H. and Aguichine, A. and Barragan, Oscar and Bryant, Edward M and Canto Martinis, B.L. and Collins, K.I. and Cooke, B. and Diaz, R. F. and Esposito, M. and Furlan, E. and Hojjatpanah, S. and Jackman, James A. G. and Jenkins, J. M. and Jensen, E. L. N. and Latham, D.W. and Leão, I.C. and Matson, Rachel A. and Nielsen, L.D. and Osborn, Ares and Otegi, J.F. and Rodler, Florian and Sabotta, S and Scott, N.J. and Seager, S. and Stockdale, Chris and Strom, Paul A. and Vanderspek, Roland and Van Eylen, V. and Wheatley, P. and Winn, J. N. and Almenara, J. M. and Barrado, D. and Barros, Susana C.C. and Bayliss, D. and Bouchy, F. and Boyd, Patricia T. and Cabrera Perez, Juan and Cochran, W. D. and Demangeon, O. and Doty, J. P. and Dumusque, X. and Figueira, Pedro and Fong, Weichun and Grziwa, S. and Hatzes, A. and Kabath, P. and Knudstrup, E. and Korth, J. and Livingston, J. and Luque, R. and Mousis, O. and Mullally, S.E. and Osborn, H. P. and Palle, E. and Persson, C. and Redfield, S. and Santos, N. C. and Smith, J. and Subjak, J. and Twicken, Joseph D. and Udry, S. and Yahalomi, Daniel A. (2021) TOI-220 b: a warm sub-Neptune discovered by TESS. Monthly Notices of the Royal Astronomical Society, 505 (3), pp. 3361-3379. Oxford University Press. doi: 10.1093/mnras/stab1427. ISSN 0035-8711.

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Official URL: https://academic.oup.com/mnras/article/505/3/3361/6280968

Abstract

In this paper, we report the discovery of TOI-220 b, a new sub-Neptune detected by the Transiting Exoplanet Survey Satellite (TESS) and confirmed by radial velocity follow-up observations with the HARPS spectrograph. Based on the combined analysis of TESS transit photometry and high precision radial velocity measurements, we estimate a planetary mass of 13.8 ± 1.0 M⊕ and radius of 3.03 ± 0.15 R⊕, implying a bulk density of 2.73 ± 0.47 gcm−3 . TOI-220 b orbits a relative bright (V= 10.4) and old (10.1 ± 1.4 Gyr) K dwarf star with a period of ~10.69 d. Thus, TOI-220 b is a new warm sub-Neptune with very precise mass and radius determinations. A Bayesian analysis of the TOI-220 b internal structure indicates that due to the strong irradiation it receives, the low density of this planet could be explained with a steam atmosphere in radiative-convective equilibrium and a supercritical water layer on top of a differentiated interior made of a silicate mantle and a small iron core.

Item URL in elib:https://elib.dlr.de/146474/
Document Type:Article
Title:TOI-220 b: a warm sub-Neptune discovered by TESS
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hoyer, S.Aix-Marseille Universite, CNRS, CNES, LAM, Marseille, FranceUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Universita di Torino, Via P. Giuria 1, 10125, Torino, ItalyUNSPECIFIED
Armstrong, D. J.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UKUNSPECIFIED
Deleuil, M.Aix Marseille Universite, CNRS, LAM (Laboratoire d Astrophysique de Marseille) UMR 7326, 13388, Marseille, FranceUNSPECIFIED
de Medeiros, J.R.Departamento de F ́ısica Te ́orica e Experimental, Universidade Federal doRio Grande do Norte, Campus Universit ́ario, Natal, RN 59072-970, BrazilUNSPECIFIED
Goffo, E.Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, ItalyUNSPECIFIED
Lillo-Box, J.Departmento de Astrofísica, Centro de Astrobiologia (CSIC-INTA),ESAC campus, 28692 Villanueva de la Cãda (Madrid), SpainUNSPECIFIED
Delgado Mena, E.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Lopez, Théo A.Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, FranceUNSPECIFIED
Santerne, A.Aix Marseille Universite, CNRS, LAM (Laboratoire d Astrophysique de Marseille) UMR 7326, 13388, Marseille, Francehttps://orcid.org/0000-0002-3586-1316
Sousa, S. G.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Fridlund, M.Department of Space, Earth and Environment, Onsala Space Observatory, Chalmers University of Technology, SE-439 92, Onsala, Sweden; Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA, Leiden, The NetherlandsUNSPECIFIED
Adibekyan, V.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Collins, K. A.Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIED
Serrano, L.M.Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, ItalyUNSPECIFIED
Cortés-Zuleta, PíaDepartamento de Astronomía, Universidad de Chile, Las Condes, ChileUNSPECIFIED
Howell, S.B.Space Science & Astrobiology Division, NASA Ames ResearchCenter, Moffett Field, CA 94035, USAUNSPECIFIED
Deeg, H.Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Aguichine, A.Aix-Marseille Universite, CNRS, CNES, LAM, Marseille, FranceUNSPECIFIED
Barragan, OscarOxford Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UKUNSPECIFIED
Bryant, Edward MDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Canto Martinis, B.L.Departamento de F ́ısica Te ́orica e Experimental, Universidade Federal doRio Grande do Norte, Campus Universit ́ario, Natal, RN 59072-970, BrazilUNSPECIFIED
Collins, K.I.Department of Physics and Astronomy, George Mason University,4400 University Drive, Fairfax, VA 22030, USAUNSPECIFIED
Cooke, B.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UKUNSPECIFIED
Diaz, R. F.Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina; CONICET - Universidad de Buenos Aires, Instituto de Astronomia y Fisica del Espacio (IAFE), Buenos Aires, ArgentinaUNSPECIFIED
Esposito, M.Thüringer Landessternwarte Tautenburg, 07778, Tautenburg, GermanyUNSPECIFIED
Furlan, E.NASA Exoplanet Science Institute, Caltech/IPAC, Mail Code 100-22, 1200 E. California Blvd., Pasadena, CA 91125, USAUNSPECIFIED
Hojjatpanah, S.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal; Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, PortugalUNSPECIFIED
Jackman, James A. G.Department of Physics, University of Warwick, Coventry, UK; Centre for Exoplanets and Habitability, University of Warwick, Coventry, UKUNSPECIFIED
Jenkins, J. M.NASA Ames Research Center, Moffett Field, CA, 94035, USAUNSPECIFIED
Jensen, E. L. N.Department of Physics and Astronomt, Swarthmore CollegeUNSPECIFIED
Latham, D.W.Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA, 02138, USAUNSPECIFIED
Leão, I.C.Departamento de Física, Universidade Federal do Rio Grande doNorte, 59078-970 Natal, RN, BrazilUNSPECIFIED
Matson, Rachel A.US Naval Observatory, 3450 Massachusetts Avenue NW, Washington, DC 20392, USAUNSPECIFIED
Nielsen, L.D.Geneva Observatory, University of Geneva, Chemin des Mailettes51, 1290 Versoix, SwitzerlandUNSPECIFIED
Osborn, AresCentre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UKUNSPECIFIED
Otegi, J.F.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, Switzerland; Institute for Computational Science, University of Zurich, Winterthurerstr. 190, 8057, Zurich, SwitzerlandUNSPECIFIED
Rodler, FlorianEuropean Southern Observatory, Alonso de C ́ordova 3107, Vitacura,Casilla 19001, Santiago de Chile, ChileUNSPECIFIED
Sabotta, SThuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tauten-burg, GermanyUNSPECIFIED
Scott, N.J.Space Science & Astrobiology Division, NASA Ames ResearchCenter, Moffett Field, CA 94035, USAUNSPECIFIED
Seager, S.Department of Earth, Atmospheric and Planetary Sciences, MIT, Cambridge, MA, 02139, USA; Department of Aeronautics and Astronautics, MIT, Cambridge, MA, 0213UNSPECIFIED
Stockdale, ChrisHazelwood Observatory, Hazelwood, AustraliaUNSPECIFIED
Strom, Paul A.Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UKUNSPECIFIED
Vanderspek, RolandDepartment of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USAUNSPECIFIED
Van Eylen, V.Mullard Space Science Laboratory, University College London, HolmburySt Mary, Dorking, Surrey RH5 6NT, UKUNSPECIFIED
Wheatley, P.University of Leicester, UKUNSPECIFIED
Winn, J. N.princeton university, department of astrophysical sciences, 4 ivy lane, princeton, nj 08544 usaUNSPECIFIED
Almenara, J. M.Instituo de Astrofisica de Canarias, SpainUNSPECIFIED
Barrado, D.Departamento de Astrofisica, Centro de Astrobiologia (INTA-CSIC), Campus ESAC (ESA)Camino Bajo del Castillo s/n 28692 Villanueva de la Canada, SpainUNSPECIFIED
Barros, Susana C.C.Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, PortugalUNSPECIFIED
Bayliss, D.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UKUNSPECIFIED
Bouchy, F.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Boyd, Patricia T.NASA Goddard Space Flight Center, Greenbelt, MD, USAUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
Cochran, W. D.Department of Astronomy and McDonald Observatory, Univerity of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USAUNSPECIFIED
Demangeon, O.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIED
Doty, J. P.Noqsi Aerospace Ltd., 15 Blanchard Avenue, Billerica, MA, 01821, USAUNSPECIFIED
Dumusque, X.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Figueira, PedroInstituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal; European Southern Observatory, Santiago, ChileUNSPECIFIED
Fong, WeichunUniversity of Colorado, Boulder, CO, USAUNSPECIFIED
Grziwa, S.Rheinisches Institut für Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, GermanyUNSPECIFIED
Hatzes, A.Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, GermanyUNSPECIFIED
Kabath, P.Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech RepublicUNSPECIFIED
Knudstrup, E.Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, DenmarkUNSPECIFIED
Korth, J.Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, GermanyUNSPECIFIED
Livingston, J.department of astronomy, the university of tokyo, 7-3-1 bunkyo-ku, tokyo 113-0033, japanUNSPECIFIED
Luque, R.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain );; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Mousis, O.Observatoire de Besançon, Institut UTINAM, 41 bis Avenue de l’Observatoire, BP 1615, 25 010 Besançon Cedex, FranceUNSPECIFIED
Mullally, S.E.Department of Aeronautics and Astronautics, MIT, 77 MassachusettsAvenue, Cambridge, MA 02139, USAUNSPECIFIED
Osborn, H. P.Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, F-13388 Marseille, France; 0000-0002-4047-4724UNSPECIFIED
Palle, E.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Persson, C.Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, SwedenUNSPECIFIED
Redfield, S.Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIED
Santos, N. C.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal; Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, PortugalUNSPECIFIED
Smith, J.NASA Ames Research Center, USAUNSPECIFIED
Subjak, J.Astronomical Institute, Czech Academy of Sciences, Fricova 298, 25165, Ondrejov, Czech Republic; Astronomical Institute, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 2027/3, 12116, Prague, Czech RepublicUNSPECIFIED
Twicken, Joseph D.NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, 189 Bernardo Ave., Suite 200, Mountain View, CA 94043, USAUNSPECIFIED
Udry, S.Observatoire de Geneve, Universite de Geneve, 51 Chemin des Maillettes, 1290 Sauverny, SwitzerlandUNSPECIFIED
Yahalomi, Daniel A.Center for Astrophysics|Harvard & Smithsonian, 60 Garden Street,Cambridge, MA 02138, USAUNSPECIFIED
Date:August 2021
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:505
DOI:10.1093/mnras/stab1427
Page Range:pp. 3361-3379
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:echniques: photometric; techniques: radial velocities; planets and satellites: fundamental parameters; planets and satellites: individual: TYC 8897-01263-1; stars: fundamental parameters; Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Csizmadia, Szilard
Deposited On:30 Nov 2021 11:25
Last Modified:30 Nov 2021 11:25

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