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:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Hoyer, S.	Aix-Marseille Universite, CNRS, CNES, LAM, Marseille, France	UNSPECIFIED	UNSPECIFIED
Gandolfi, D.	Dipartimento di Fisica, Universita di Torino, Via P. Giuria 1, 10125, Torino, Italy	UNSPECIFIED	UNSPECIFIED
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, UK	UNSPECIFIED	UNSPECIFIED
Deleuil, M.	Aix Marseille Universite, CNRS, LAM (Laboratoire d Astrophysique de Marseille) UMR 7326, 13388, Marseille, France	UNSPECIFIED	UNSPECIFIED
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, Brazil	UNSPECIFIED	UNSPECIFIED
Goffo, E.	Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy	UNSPECIFIED	UNSPECIFIED
Lillo-Box, J.	Departmento de Astrofísica, Centro de Astrobiologia (CSIC-INTA),ESAC campus, 28692 Villanueva de la Cãda (Madrid), Spain	UNSPECIFIED	UNSPECIFIED
Delgado Mena, E.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
Lopez, Théo A.	Aix-Marseille Université, CNRS, CNES, LAM, Marseilles, France	UNSPECIFIED	UNSPECIFIED
Santerne, A.	Aix Marseille Universite, CNRS, LAM (Laboratoire d Astrophysique de Marseille) UMR 7326, 13388, Marseille, France	https://orcid.org/0000-0002-3586-1316	UNSPECIFIED
Sousa, S. G.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
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 Netherlands	UNSPECIFIED	UNSPECIFIED
Adibekyan, V.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
Collins, K. A.	Center for Astrophysics \| Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA	UNSPECIFIED	UNSPECIFIED
Serrano, L.M.	Dipartimento di Fisica, Università degli Studi di Torino, via PietroGiuria 1, I-10125, Torino, Italy	UNSPECIFIED	UNSPECIFIED
Cortés-Zuleta, Pía	Departamento de Astronomía, Universidad de Chile, Las Condes, Chile	UNSPECIFIED	UNSPECIFIED
Howell, S.B.	Space Science & Astrobiology Division, NASA Ames ResearchCenter, Moffett Field, CA 94035, USA	UNSPECIFIED	UNSPECIFIED
Deeg, H.	Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain \| Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, Spain	UNSPECIFIED	UNSPECIFIED
Aguichine, A.	Aix-Marseille Universite, CNRS, CNES, LAM, Marseille, France	UNSPECIFIED	UNSPECIFIED
Barragan, Oscar	Oxford Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK	UNSPECIFIED	UNSPECIFIED
Bryant, Edward M	Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
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, Brazil	UNSPECIFIED	UNSPECIFIED
Collins, K.I.	Department of Physics and Astronomy, George Mason University,4400 University Drive, Fairfax, VA 22030, USA	UNSPECIFIED	UNSPECIFIED
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, UK	UNSPECIFIED	UNSPECIFIED
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, Argentina	UNSPECIFIED	UNSPECIFIED
Esposito, M.	Thüringer Landessternwarte Tautenburg, 07778, Tautenburg, Germany	UNSPECIFIED	UNSPECIFIED
Furlan, E.	NASA Exoplanet Science Institute, Caltech/IPAC, Mail Code 100-22, 1200 E. California Blvd., Pasadena, CA 91125, USA	UNSPECIFIED	UNSPECIFIED
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, Portugal	UNSPECIFIED	UNSPECIFIED
Jackman, James A. G.	Department of Physics, University of Warwick, Coventry, UK; Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK	UNSPECIFIED	UNSPECIFIED
Jenkins, J. M.	NASA Ames Research Center, Moffett Field, CA, 94035, USA	UNSPECIFIED	UNSPECIFIED
Jensen, E. L. N.	Department of Physics and Astronomt, Swarthmore College	UNSPECIFIED	UNSPECIFIED
Latham, D.W.	Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA, 02138, USA	UNSPECIFIED	UNSPECIFIED
Leão, I.C.	Departamento de Física, Universidade Federal do Rio Grande doNorte, 59078-970 Natal, RN, Brazil	UNSPECIFIED	UNSPECIFIED
Matson, Rachel A.	US Naval Observatory, 3450 Massachusetts Avenue NW, Washington, DC 20392, USA	UNSPECIFIED	UNSPECIFIED
Nielsen, L.D.	Geneva Observatory, University of Geneva, Chemin des Mailettes51, 1290 Versoix, Switzerland	UNSPECIFIED	UNSPECIFIED
Osborn, Ares	Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK	UNSPECIFIED	UNSPECIFIED
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, Switzerland	UNSPECIFIED	UNSPECIFIED
Rodler, Florian	European Southern Observatory, Alonso de C ́ordova 3107, Vitacura,Casilla 19001, Santiago de Chile, Chile	UNSPECIFIED	UNSPECIFIED
Sabotta, S	Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tauten-burg, Germany	UNSPECIFIED	UNSPECIFIED
Scott, N.J.	Space Science & Astrobiology Division, NASA Ames ResearchCenter, Moffett Field, CA 94035, USA	UNSPECIFIED	UNSPECIFIED
Seager, S.	Department of Earth, Atmospheric and Planetary Sciences, MIT, Cambridge, MA, 02139, USA; Department of Aeronautics and Astronautics, MIT, Cambridge, MA, 0213	UNSPECIFIED	UNSPECIFIED
Stockdale, Chris	Hazelwood Observatory, Hazelwood, Australia	UNSPECIFIED	UNSPECIFIED
Strom, Paul A.	Centre for Exoplanets and Habitability, University of Warwick, Coventry, UK; Department of Physics, University of Warwick, Coventry, UK	UNSPECIFIED	UNSPECIFIED
Vanderspek, Roland	Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA, USA	UNSPECIFIED	UNSPECIFIED
Van Eylen, V.	Mullard Space Science Laboratory, University College London, HolmburySt Mary, Dorking, Surrey RH5 6NT, UK	UNSPECIFIED	UNSPECIFIED
Wheatley, P.	University of Leicester, UK	UNSPECIFIED	UNSPECIFIED
Winn, J. N.	princeton university, department of astrophysical sciences, 4 ivy lane, princeton, nj 08544 usa	UNSPECIFIED	UNSPECIFIED
Almenara, J. M.	Instituo de Astrofisica de Canarias, Spain	UNSPECIFIED	UNSPECIFIED
Barrado, D.	Departamento de Astrofisica, Centro de Astrobiologia (INTA-CSIC), Campus ESAC (ESA)Camino Bajo del Castillo s/n 28692 Villanueva de la Canada, Spain	UNSPECIFIED	UNSPECIFIED
Barros, Susana C.C.	Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal	UNSPECIFIED	UNSPECIFIED
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, UK	UNSPECIFIED	UNSPECIFIED
Bouchy, F.	Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, Switzerland	UNSPECIFIED	UNSPECIFIED
Boyd, Patricia T.	NASA Goddard Space Flight Center, Greenbelt, MD, USA	UNSPECIFIED	UNSPECIFIED
Cabrera Perez, Juan	UNSPECIFIED	https://orcid.org/0000-0001-6653-5487	UNSPECIFIED
Cochran, W. D.	Department of Astronomy and McDonald Observatory, Univerity of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA	UNSPECIFIED	UNSPECIFIED
Demangeon, O.	Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal	UNSPECIFIED	UNSPECIFIED
Doty, J. P.	Noqsi Aerospace Ltd., 15 Blanchard Avenue, Billerica, MA, 01821, USA	UNSPECIFIED	UNSPECIFIED
Dumusque, X.	Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, Switzerland	UNSPECIFIED	UNSPECIFIED
Figueira, Pedro	Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal; European Southern Observatory, Santiago, Chile	UNSPECIFIED	UNSPECIFIED
Fong, Weichun	University of Colorado, Boulder, CO, USA	UNSPECIFIED	UNSPECIFIED
Grziwa, S.	Rheinisches Institut für Umweltforschung an der Universitaet zu Koeln, Aachener Strasse 209, 50931 Koeln, Germany	UNSPECIFIED	UNSPECIFIED
Hatzes, A.	Thueringer Landessternwarte, Sternwarte 5, Tautenburg 5, D-07778 Tautenburg, Germany	UNSPECIFIED	UNSPECIFIED
Kabath, P.	Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech Republic	UNSPECIFIED	UNSPECIFIED
Knudstrup, E.	Stellar Astrophysics Centre, Deparment of Physics and Astronomy, Aarhus University, Ny Munkegrade 120, 8000 Aarhus C, Denmark	UNSPECIFIED	UNSPECIFIED
Korth, J.	Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931 Köln, Germany	UNSPECIFIED	UNSPECIFIED
Livingston, J.	department of astronomy, the university of tokyo, 7-3-1 bunkyo-ku, tokyo 113-0033, japan	UNSPECIFIED	UNSPECIFIED
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, Spain	UNSPECIFIED	UNSPECIFIED
Mousis, O.	Observatoire de Besançon, Institut UTINAM, 41 bis Avenue de l’Observatoire, BP 1615, 25 010 Besançon Cedex, France	UNSPECIFIED	UNSPECIFIED
Mullally, S.E.	Department of Aeronautics and Astronautics, MIT, 77 MassachusettsAvenue, Cambridge, MA 02139, USA	UNSPECIFIED	UNSPECIFIED
Osborn, H. P.	Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, F-13388 Marseille, France; 0000-0002-4047-4724	UNSPECIFIED	UNSPECIFIED
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, Spain	UNSPECIFIED	UNSPECIFIED
Persson, C.	Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden	UNSPECIFIED	UNSPECIFIED
Redfield, S.	Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA	UNSPECIFIED	UNSPECIFIED
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, Portugal	UNSPECIFIED	UNSPECIFIED
Smith, J.	NASA Ames Research Center, USA	UNSPECIFIED	UNSPECIFIED
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 Republic	UNSPECIFIED	UNSPECIFIED
Twicken, Joseph D.	NASA Ames Research Center, Moffett Field, CA 94035, USA; SETI Institute, 189 Bernardo Ave., Suite 200, Mountain View, CA 94043, USA	UNSPECIFIED	UNSPECIFIED
Udry, S.	Observatoire de Geneve, Universite de Geneve, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
Yahalomi, Daniel A.	Center for Astrophysics\|Harvard & Smithsonian, 60 Garden Street,Cambridge, MA 02138, USA	UNSPECIFIED	UNSPECIFIED

Date:

August 2021

Journal or Publication Title:

Monthly Notices of the Royal Astronomical Society

Refereed publication:

Open Access:

Yes

Gold Open Access:

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:

27 Oct 2023 14:12

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