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Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076

Osborn, H. P. and Bonfanti, A. and Gandolfi, D. and Hedges, C. and Leleu, A. and Fortier, A. and Futyan, D. and Gutermann, P. and Maxted, P. F. L. and Borsato, L. and Collins, K. A. and Gomes da Silva, J. and Gómez Maqueo Chew, Y. and Hooton, M. J. and Lendl, M. and Parviainen, H. and Salmon, S. and Schanche, N. and Serrano, L. M. and Sousa, S. G. and Tuson, A. and Ulmer-Moll, S. and Van Grootel, V. and Wells, R. D. and Wilson, T. G. and Alibert, Y. and Alonso, R. and Anglada Escudé, G. and Asquier, J. and Barrado y Navascués, D. and Baumjohann, W. and Beck, T. and Benz, W. and Biondi, F. and Bonfils, X. and Bouchy, F. and Brandeker, A. and Broeg, C. and Bàrczy, T. and Barros, S. C. C. and Cabrera, J. and Charnoz, S. and Collier Cameron, A. and Csizmadia, S. and Davies, M. B. and Deleuil, M. and Delrez, L. and Demory, B. O. and Ehrenreich, D. and Erikson, A. and Fossati, L. and Fridlund, M. and Gillon, M. and Gömez-Munoz, M. A. and Güdel, M. and Heng, K. and Hoyer, S. and Isaak, K. G. and Kiss, L. L. and Laskar, J. and Lecavelier des Etangs, A. and Lovis, C. and Magrin, D. and Malavolta, L. and McCormac, J. and Nascimbeni, V. and Olofsson, G. and Ottensamer, R. and Pagano, I. and Palle, E. and Peter, G. and Piazza, D. and Piotto, G. and Pollacco, D. and Queloz, D. and Ragazzoni, R. and Rando, N. and Rauer, H. and Reimers, C. and Ribas, I. and Demangeon, O. D. S. and Smith, Alexis M S and Sabin, L. and Santos, N. C. and Scandariato, G. and Schroffenegger, U. and Schwarz, R. P. and Shporer, A. and Simon, A. E. and Steller, M. and Szabo, G. M. and Ségransan, D. and Thomas, N. and Udry, S. and Walter, I. and Walton, N. A. (2022) Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076. Astronomy and Astrophysics, 664, A156. EDP Sciences. doi: 10.1051/0004-6361/202243065. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/full_html/2022/08/aa43065-22/aa43065-22.htmlhttps://www.aanda.org/articles/aa/full_html/2022/08/aa43065-22/aa43065-22.html

Abstract

Context. TOI-2076 is a transiting three-planet system of sub-Neptunes orbiting a bright (G = 8.9 mag), young (340 ± 80 Myr) K-type star. Although a validated planetary system, the orbits of the two outer planets were unconstrained as only two non-consecutive transits were seen in TESS photometry. This left 11 and 7 possible period aliases for each. Aims: To reveal the true orbits of these two long-period planets, precise photometry targeted on the highest-probability period aliases is required. Long-term monitoring of transits in multi-planet systems can also help constrain planetary masses through TTV measurements. Methods: We used the MonoTools package to determine which aliases to follow, and then performed space-based and ground-based photometric follow-up of TOI-2076 c and d with CHEOPS, SAINT-EX, and LCO telescopes. Results: CHEOPS observations revealed a clear detection for TOI-2076 c at P = 21.02538 - 0.00074 + 0.00084 d, and allowed us to rule out three of the most likely period aliases for TOI-2076 d. Ground-based photometry further enabled us to rule out remaining aliases and confirm the P = 35.12537 ± 0.00067 d alias. These observations also improved the radius precision of all three sub-Neptunes to 2.518 ± 0.036, 3.497 ± 0.043, and 3.232 ± 0.063 R⊕. Our observations also revealed a clear anti-correlated TTV signal between planets b and c likely caused by their proximity to the 2:1 resonance, while planets c and d appear close to a 5:3 period commensurability, although model degeneracy meant we were unable to retrieve robust TTV masses. Their inflated radii, likely due to extended H-He atmospheres, combined with low insolation makes all three planets excellent candidates for future comparative transmission spectroscopy with JWST.

Item URL in elib:https://elib.dlr.de/188099/
Document Type:Article
Title:Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Osborn, H. P.NCCR/PlanetS, Centre for Space & Habitability, University of Bern, Bern, Switzerland; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USAUNSPECIFIEDUNSPECIFIED
Bonfanti, A.Space Research Institute, Austrian Academy of Sciences, AustriaUNSPECIFIEDUNSPECIFIED
Gandolfi, D.Dipartimento di Fisica, Universita degli Studi di Torino, via Pietro Giuria 1, 10125, Torino, Italyhttps://orcid.org/0000-0001-8627-9628UNSPECIFIED
Hedges, C.Bay Area Environmental Research Institute, PO Box 25, Moffett Field, CA, 94035, USA; NASA Ames Research Center, Moffett Field, CA, 94035, USAUNSPECIFIEDUNSPECIFIED
Leleu, A.Observatoire Astronomique de l’Université de Genève, CheminPegasi 51, Versoix, SwitzerlandUNSPECIFIEDUNSPECIFIED
Fortier, A.Physikalisches Institut, University of Bern, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Futyan, D.Observatoire de Genève, University of Geneva, SwitzerlandUNSPECIFIEDUNSPECIFIED
Gutermann, P.Aix-Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille, France; Division Technique, Institut National des Sciences de l'Univers (INSU), CS 20330, 83507, La Seyne-sur-Mer, FranceUNSPECIFIEDUNSPECIFIED
Maxted, P. F. L.Astrophysics Group, Keele University, StaffordshireUNSPECIFIEDUNSPECIFIED
Borsato, L.Dipartimento di Fisica e Astronomia, Universita degli Studi di Padova, via Marzolo 8, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Collins, K. A.Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAUNSPECIFIEDUNSPECIFIED
Gomes da Silva, J.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, PortugalUNSPECIFIEDUNSPECIFIED
Gómez Maqueo Chew, Y.Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 70-264, CDMX, 04510, MexicoUNSPECIFIEDUNSPECIFIED
Hooton, M. J.Physikalisches Institut, University of Bern, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Lendl, M.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, SwitzerlandUNSPECIFIEDUNSPECIFIED
Parviainen, H.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, SpainUNSPECIFIEDUNSPECIFIED
Salmon, S.STAR, Université de Liège, BelgiumUNSPECIFIEDUNSPECIFIED
Schanche, N.Center for Space and Habitability, University of Bern, Gesellschaftsstrasse 6, 3012, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Serrano, L. M.Dipartimento di Fisica, Università degli Studi di Torino, via Pietro Giuria 1, I-10125, Torino, ItalyUNSPECIFIEDUNSPECIFIED
Sousa, S. G.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIEDUNSPECIFIED
Tuson, A.Astrophysics Group, Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, UKUNSPECIFIEDUNSPECIFIED
Ulmer-Moll, S.Observatoire Astronomique de l'Université de Genève, Chemin Pegasi 51, Versoix, SwitzerlandUNSPECIFIEDUNSPECIFIED
Van Grootel, V.STAR, Université de Liège, BelgiumUNSPECIFIEDUNSPECIFIED
Wells, R. D.Center for Space and Habitability, University of Bern, Gesellschaftsstrasse 6, 3012, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Wilson, T. G.School of Physics and Astronomy, St. Andrews, UKhttps://orcid.org/0000-0001-8749-1962UNSPECIFIED
Alibert, Y.Physikalisches Institut, University of Bern;Observatoire de Besançon, Institut UTINAM, FranceUNSPECIFIEDUNSPECIFIED
Alonso, R.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIEDUNSPECIFIED
Anglada Escudé, G.Institut de Ciències de l’Espai (ICE, CSIC), Campus UAB, CanMagrans s/n, 08193 Bellaterra, Spain; Institut d’Estudis Espacials de Catalunya (IEEC), 08034 Barcelona,SpainUNSPECIFIEDUNSPECIFIED
Asquier, J.ESA/ESTEC, Noordwijk, NiederlandeUNSPECIFIEDUNSPECIFIED
Barrado y Navascués, D.Depto. de Astrofisica, Centro de Astrobiologia (CSIC-INTA), ESAC campus, E-28692 Villanueva de la Cañada (Madrid), SpainUNSPECIFIEDUNSPECIFIED
Baumjohann, W.Space Research Institute, Austrian Academy of Sciences, Graz, AustriaUNSPECIFIEDUNSPECIFIED
Beck, T.Center for Space and Habitability, University of Bern, Gesellschaftsstraße 6, 3012, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Benz, W.Physikalisches Institut, Universität Bern, CHUNSPECIFIEDUNSPECIFIED
Biondi, F.INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Bonfils, X.Institut de Planétologie et d'Astrophysique, University of Grenoble, FranceUNSPECIFIEDUNSPECIFIED
Bouchy, F.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIEDUNSPECIFIED
Brandeker, A.Department of Astronomy – Stockholm University, SE-106 91 Stockholm, SwedenUNSPECIFIEDUNSPECIFIED
Broeg, C.Physikalisches Institut, University of Bern, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Bàrczy, T.Admatis, Miskolc, HungaryUNSPECIFIEDUNSPECIFIED
Barros, S. C. C.Instituto de Astrofisica e Ciencias do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, PortugalUNSPECIFIEDUNSPECIFIED
Cabrera, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Charnoz, S.Institut de Physique du Globe, Paris, FranceUNSPECIFIEDUNSPECIFIED
Collier Cameron, A.SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS, UKUNSPECIFIEDUNSPECIFIED
Csizmadia, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Davies, M. B.Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, 22100, Lund, SwedenUNSPECIFIEDUNSPECIFIED
Deleuil, M.Aix Marseille Universite, CNRS, LAM (Laboratoire d Astrophysique de Marseille) UMR 7326, F-13388 Marseille, FranceUNSPECIFIEDUNSPECIFIED
Delrez, L.Institut d Astrophysique et de Geophysique, Universite de Liege, Allee du 6 Aout, 17, Bat. B5C, Liege 1, BelgiumUNSPECIFIEDUNSPECIFIED
Demory, B. O.Center for Space and Habitability, University of Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Ehrenreich, D.Observatoire de Genève, University of Geneva, SwitzerlandUNSPECIFIEDUNSPECIFIED
Erikson, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fossati, L.Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042, Graz, AustriaUNSPECIFIEDUNSPECIFIED
Fridlund, M.Leiden Observatory, Leiden University, 2333CA Leiden, The Netherlands; Chalmers University of Technology, Department of Space, Earth and Environment, Onsala Space Observatory, SE-439 92 Onsala, Sweden; Instituto de Astrofísica de Canarias (IAC), 38205 Lahttps://orcid.org/0000-0002-0855-8426UNSPECIFIED
Gillon, M.Institut d’Astrophysique de l’Université Liège, Allèe du 6 Aout 17, 4000 Liège, BelgiumUNSPECIFIEDUNSPECIFIED
Gömez-Munoz, M. A.Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 106, Ensenada, 22800 BC, MexicoUNSPECIFIEDUNSPECIFIED
Güdel, M.Department of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, A-1180 Vienna, AustriaUNSPECIFIEDUNSPECIFIED
Heng, K.Center for Space and Habitability, University of Bern, Gesellschaftsstraße 6, 3012, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Hoyer, S.Aix Marseille Univ, CNRS, CNES, LAM, 38 rue Frédéric Joliot-Curie, 13388 Marseille, Francehttps://orcid.org/0000-0003-3477-2466UNSPECIFIED
Isaak, K. G.ESA/ESTEC, Noordwijk, NiederlandeUNSPECIFIEDUNSPECIFIED
Kiss, L. L.Konkoly Observatory, Research Centre for Astronomy and Earth, Budapest, HungaryUNSPECIFIEDUNSPECIFIED
Laskar, J.IMCCE, UMR8028 CNRS, Observatoire de Paris, PSL Univ.,Sorbonne Univ., 77 av. Denfert-Rochereau, 75014 Paris, FranceUNSPECIFIEDUNSPECIFIED
Lecavelier des Etangs, A.Institut d Astrophysique de Paris, CNRS, UMR 7095 & Sorbonne Universites, UPMC Paris 6, 98 bis bd Arago, 75014 Paris, FranceUNSPECIFIEDUNSPECIFIED
Lovis, C.Observatoire de l Universite de Geneve, 51 chemin des Maillettes, 1290 Sauverny, SwitzerlandUNSPECIFIEDUNSPECIFIED
Magrin, D.INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Malavolta, L.INAF, Osservatorio Astronomico di Padova, Padova, ItalyUNSPECIFIEDUNSPECIFIED
McCormac, J.Dept. 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, UKUNSPECIFIEDUNSPECIFIED
Nascimbeni, V.Dipartimento di Fisica ed Astronomia, Universitá degli Studi di Padova, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Olofsson, G.Department of Astronomy, Stockholm University, AlbaNova University Center, 10691 Stockholm, SwedenUNSPECIFIEDUNSPECIFIED
Ottensamer, R.University of Vienna, Department of Astrophysics, AustriaUNSPECIFIEDUNSPECIFIED
Pagano, I.INAF – Osservatorio Astrofisico di Catania, Via S.Sofia 78, 95123 Catania, ItalyUNSPECIFIEDUNSPECIFIED
Palle, E.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIEDUNSPECIFIED
Peter, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Piazza, D.Physics Institute, Space Research & Planetary Sciences, University of Bern, Sidlerstr. 5, CH-3012 Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Piotto, G.INAF – Osservatorio Astronomico di Padova, vicolo dell Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Pollacco, 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, UKUNSPECIFIEDUNSPECIFIED
Queloz, D.Cavendish Laboratory, J J Thomson Avenue, Cambridge, CB3 0HE, UKUNSPECIFIEDUNSPECIFIED
Ragazzoni, R.Dipartimento di Fisica e Astronomia, Universita degli Studi di Padova, Vicolo dell Osservatorio 3, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Rando, N.ESA/ESTEC, Noordwijk, NiederlandeUNSPECIFIEDUNSPECIFIED
Rauer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Reimers, C.Department of Astrophysics, University of Vienna, Tuerkenschanzs-trasse 17, 1180 Vienna, AustriaUNSPECIFIEDUNSPECIFIED
Ribas, I.Institut de Ciencies de l Espai (CSIC-IEEC), Carrer de Can Magrans, Campus UAB, E-08193 Bellaterra, SpainUNSPECIFIEDUNSPECIFIED
Demangeon, O. D. S.Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, PortugalUNSPECIFIEDUNSPECIFIED
Smith, Alexis M SUNSPECIFIEDhttps://orcid.org/0000-0002-2386-4341UNSPECIFIED
Sabin, L.Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 106, Ensenada, 22800 BC, MexicoUNSPECIFIEDUNSPECIFIED
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, PortugalUNSPECIFIEDUNSPECIFIED
Scandariato, G.NAF – Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, ItalyUNSPECIFIEDUNSPECIFIED
Schroffenegger, U.Center for Space and Habitability, University of Bern, Gesellschaftsstrasse 6, 3012, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Schwarz, R. P.Patashnick Voorheesville Observatory, Voorheesville, NY 12186, USAUNSPECIFIEDUNSPECIFIED
Shporer, A.Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA, 02139, USAUNSPECIFIEDUNSPECIFIED
Simon, A. E.Center for Space and Habitability, University of Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Steller, M.Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042, Graz, AustriaUNSPECIFIEDUNSPECIFIED
Szabo, G. M.Konkoly Observatory, Budapest, HungaryUNSPECIFIEDUNSPECIFIED
Ségransan, D.Geneva Observatory, University of Geneva, Chemin Pegasi 51, CH-1290 Versoix, SwitzerlandUNSPECIFIEDUNSPECIFIED
Thomas, N.Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012, Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Udry, S.Geneva Observatory, University of Geneva, Chemin Pegasi 51, CH-1290 Versoix, SwitzerlandUNSPECIFIEDUNSPECIFIED
Walter, I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walton, N. A.Institute of Astronomy, University of Cambridge, Cambridge, UKUNSPECIFIEDUNSPECIFIED
Date:2022
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:664
DOI:10.1051/0004-6361/202243065
Page Range:A156
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:planets and satellites: detection, stars: individual: TOI-2076, techniques: photometric, 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 - CHEOPS Science, R - Project CHEOPS
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Institute of Optical Sensor Systems > Space Instruments
Deposited By: Smith, Dr Alexis M S
Deposited On:08 Sep 2022 11:54
Last Modified:08 Sep 2022 11:54

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