Planets and satellites: composition; Planets and satellites: detection; Planets and satellites: general; Dynamical analysis; Internal structure; Mean density; Mean motion resonances; Orbital parameters; Orbital periods; Radial-velocity observations; Transmission spectroscopy; Astronomy and Astrophysics; Space and Planetary Science; astro-ph.EP
Abstract :
[en] The Transiting Exoplanet Survey Satellite (TESS) mission was designed to perform an all-sky search of planets around bright and nearby stars. Here we report the discovery of two sub-Neptunes orbiting around TOI 1062 (TIC 299799658), a V = 10.25 G9V star observed in the TESS Sectors 1, 13, 27, and 28. We use precise radial velocity observations from HARPS to confirm and characterize these two planets. TOI 1062b has a radius of 2.265-0.091+0.096 RO, a mass of 10.15 ± 0.8 MO, and an orbital period of 4.1130 ± 0.0015 days. The second planet is not transiting, has a minimum mass of 9.78-1.18+1.26 MO and is near the 2:1 mean motion resonance with the innermost planet with an orbital period of 7.972-0.024+0.018 days. We performed a dynamical analysis to explore the proximity of the system to this resonance, and to attempt further constraining the orbital parameters. The transiting planet has a mean density of 4.85-0.74+0.84 g cm-3 and an analysis of its internal structure reveals that it is expected to have a small volatile envelope accounting for 0.35% of the mass at most. The star's brightness and the proximity of the inner planet to what is know as the radius gap make it an interesting candidate for transmission spectroscopy, which could further constrain the composition and internal structure of TOI 1062b.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Otegi, J.F.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland ; Institute for Computational Science, University of Zurich, Zurich, Switzerland
Bouchy, F.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Helled, R.; Institute for Computational Science, University of Zurich, Zurich, Switzerland
Armstrong, D.J.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Stalport, Manu ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR) ; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Psaridi, A.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Delisle, J.-B.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Stassun, K.G.; Vanderbilt University, Department of Physics and Astronomy, Nashville, United States
Delgado-Mena, E.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal
Santos, N.C.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
Hara, N.C.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Collins, K.; Center for Astrophysics, Harvard and Smithsonian, Cambridge, United States
Gandhi, S.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Dorn, C.; Institute for Computational Science, University of Zurich, Zurich, Switzerland
Brogi, M.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Fridlund, M.; Leiden Observatory, University of Leiden, Leiden, Netherlands ; Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, Onsala, Sweden
Osborn, H.P.; NCCR/PlanetS, Centre for Space and Habitability, University of Bern, Bern, Switzerland ; Department of Physics and Kavli, Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States
Hoyer, S.; Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
Udry, S.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Hojjatpanah, S.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
Nielsen, L.D.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Dumusque, X.; Observatoire Astronomique de l'Université de Genève, Versoix, Switzerland
Adibekyan, V.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
Conti, D.; American Association of Variable Star Observers, Cambridge, United States
Schwarz, R.; Patashnick Voorheesville Observatory, Voorheesville, United States
Wang, G.; Tsinghua International School, Beijing, China
Figueira, P.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal ; European Southern Observatory, Santiago, Chile
Lillo-Box, J.; Center for Astrobiology, CAB, INTA-CSIC, Dept. de Astrofísica, ESAC, Madrid, Spain
Hadjigeorghiou, A.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Bayliss, D.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Strøm, P.A.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Sousa, S.G.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal
Barrado, D.; Center for Astrobiology, CAB, INTA-CSIC, Dept. de Astrofísica, ESAC, Madrid, Spain
Osborn, A.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Barros, S.C.C.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
Brown, D.J.A.; Department of Physics, University of Warwick, Coventry, United Kingdom ; Centre for Exoplanets and Habitability, University of Warwick, Coventry, United Kingdom
Eastman, J.D.; Center for Astrophysics, Harvard and Smithsonian, Cambridge, United States
Ciardi, D.R.; Caltech/IPAC-NExScI, M/S 100-22, Pasadena, United States
Vanderburg, A.; Department of Astronomy, University of Texas at Austin, Austin, United States
Goeke, R.F.; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States
Guerrero, N.M.; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States
Boyd, P.T.; Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, United States
Caldwell, D.A.; NASA Ames Research Center, Moffett Field, United States ; SETI Institute, Mountain View, United States
Henze, C.E.; NASA Ames Research Center, Moffett Field, United States
Mclean, B.; Space Telescope Science Institute, Baltimore, United States
Ricker, G.; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States
Vanderspek, R.; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States
Latham, D.W.; Center for Astrophysics, Harvard and Smithsonian, Cambridge, United States
Seager, S.; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, United States ; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, United States ; Department of Aeronautics and Astronautics, MIT, Cambridge, United States
Winn, J.; Department of Astrophysical Sciences, Princeton University, United States
Jenkins, J.M.; NASA Ames Research Center, Moffett Field, United States
This work has been in particular carried out in the frame of the National Centre for Competence in Research 'PlanetS' supported by SNSF. D.J.A. acknowledges support from the STFC via an Ernest Rutherford Fellowship (ST/R00384X/1).ST/S000631/1. 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. We acknowledge the use of public TESS Alert data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. This research has been partly funded by the Spanish State Research Agency (AEI) Projects No. ESP2017-87676-C5-1-R and No. MDM-2017-0737 Unidad de Excelencia \u201CMar\u00EDa de Maeztu\u201D-Centro de Astro-biolog\u00EDa (INTA-CSIC). S.G.S acknowledges the support from FCT through Investigador FCT contract nr. CEECIND/00826/2018 and POPH/FSE (EC). H.P.O. acknowledges that this work has been carried out within the framework of the NCCR PlanetS supported by the Swiss National Science Foundation. S.H. acknowledges support by the fellowships PD/BD/128119/2016 funded by FCT (Portugal). X.D is grateful to The Branco Weiss Fellowship\u2013Society in Science for its financial support. This project has received funding from the European Research Council (ERC) under the European Union\u2019s Horizon 2020 research and innovation programme (grant agreement No 851555/SCORE. A.O acknowledges support from an STFC studentship. S.H acknowledges CNES funding through the grant 837319.This work was supported by FCT through national funds (PTDC/FIS-AST/28953/2017) and by FEDER - Fundo Europeu de Desenvolvimento Regional through COMPETE2020 - Programa Opera-cional Competitividade e Internacionaliza\u00E7\u00E3o (POCI-01-0145-FEDER-028953) and through national funds (PIDDAC) by the grant UID/FIS/04434/2019. Funding for the TESS mission is provided by NASA\u2019s Science Mission directorate. This work makes use of observations from the LCOGT network.Acknowledgements. This work has been in particular carried out in the frame of the National Centre for Competence in Research \u2018PlanetS\u2019 supported by SNSF. D.J.A. acknowledges support from the STFC via an Ernest Rutherford Fellowship (ST/R00384X/1). This work was supported by FCT -Funda\u00E7\u00E3o para a Ci\u00EAncia e a Tecnologia through national funds and by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionaliza\u00E7\u00E3o by these grants: UID/FIS/04434/2019; UIDB/04434/2020; UIDP/04434/2020; PTDC/FIS-AST/32113/2017 and POCI-01-0145-FEDER-032113; PTDC/FIS-AST/28953/2017 and POCI-01-0145-FEDER-028953. V.A. and E.D.M acknowledge the support from FCT through Investigador FCT contracts nr. IF/00650/2015/CP1273/CT0001, IF/00849/2015/CP1273/CT0003, respectively. C.D. acknowledges support from the Swiss National Science Foundation under grant PZ00P2_174028. Siddharth Gandhi acknowledges support from the UK Science and Technology Facilities Council (STFC) research grant
Moses, J. I., Line, M. R., Visscher, C., et al. 2013, ApJ, 777, 34
Nielsen, L. D., Gandolfi, D., Armstrong, D. J., et al. 2020, MNRAS, 492, 5399
Otegi, J. F., Bouchy, F., & Helled, R. 2020 a, A&A, 634, A43
Otegi, J. F., Dorn, C., Helled, R., et al. 2020 b, A&A, 640, A135
Owen, J. E., & Jackson, A. P. 2012, MNRAS, 425, 2931
Pepe, F., Mayor, M., Rupprecht, G., et al. 2002, The Messenger, 110, 9
Plotnykov, M., & Valencia, D. 2020, MNRAS, 499, 932
Rein, H., & Liu, S. F. 2012, A&A, 537, A128
Rein, H., & Spiegel, D. S. 2015, MNRAS, 446, 1424
Ricker, G. R., Winn, J. N., Vanderspek, R., et al. 2015, J. Astron. Teles. Instrum. Syst., 1, 014003
Santos, N. C., Israelian, G., & Mayor, M. 2004, A&A, 415, 1153
Santos, N. C., Sousa, S. G., Mortier, A., et al. 2013, A&A, 556, A150
Scott, N. J. 2019, AAS/Div. Extreme Sol. Syst. Abs., 51, 330.15
Skrutskie, M. F., Cutri, R. M., Stiening, R., et al. 2006, AJ, 131, 1163
Smith, J. C., Stumpe, M. C., Van Cleve, J. E., et al. 2012, PASP, 124, 1000
Sneden, C. A. 1973, PhD thesis, The University of Texas at Austin, USA
Sousa, S. G. 2014, Determination of Atmospheric Parameters of B-, A-, F-And G-Type Stars, GeoPlanet: Earth and Planetary Sciences (Springer International Publishing (Cham)), eds. E. Niemczura, B. Smalley & W. Pych, 297
Sousa, S. G., Santos, N. C., Adibekyan, V., Delgado-Mena, E., & Israelian, G. 2015, A&A, 577, A67
Speagle, J. S. 2020, MNRAS, 493, 3132
Stassun, K. G., & Torres, G. 2016, AJ, 152, 180
Stassun, K. G., & Torres, G. 2018, ApJ, 862, 61
Stassun, K. G., Collins, K. A., & Gaudi, B. S. 2017, AJ, 153, 136
Stassun, K. G., Corsaro, E., Pepper, J. A., & Gaudi, B. S. 2018, AJ, 155, 22
Stevenson, K. B., Harrington, J., Nymeyer, S., et al. 2010, Nature, 464, 1161
Stixrude, L., & Lithgow-Bertelloni, C. 2011, Geophys. J. Int., 184, 1180
Sullivan, P. W., Winn, J. N., Berta-Thompson, Z. K., et al. 2015, ApJ, 809, 77
Szabó, G. M., & Kiss, L. L. 2011, ApJ, 727, L44
Tamayo, D., Rein, H., Shi, P., & Hernandez, D. M. 2019, MNRAS, 491, 2885
