A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS
Artikel i vetenskaplig tidskrift, 2022
We report the discovery and characterization of a pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 (TIC 79748331), initially detected in the Transiting Exoplanet Survey Satellite (TESS) photometry. To characterize the system, we performed and retrieved the CHaracterising ExOPlanets Satellite (CHEOPS), TESS, and ground-based photometry, the High Accuracy Radial velocity Planet Searcher (HARPS) high-resolution spectroscopy, and Gemini speckle imaging. We characterize the host star and determine T-eff,T-* = 4734 +/- 67 K, R-* = 0.726 +/- 0.007 R-circle dot, and M-* = 0.748 +/- 0.032 M-circle dot. We present a novel detrending method based on point spread function shape-change modelling and demonstrate its suitability to correct flux variations in CHEOPS data. We confirm the planetary nature of both bodies and find that TOI-1064 b has an orbital period of P-b = 6.44387 +/- 0.00003 d, a radius of R-b = 2.59 +/- 0.04 R-circle plus, and a mass of M-b = 13.5(-1.8)(+1.7) M-circle plus, whilst TOI-1064 c has an orbital period of P-c = 12.22657(-0.0)(0004)(+0.00005) d, a radius of R-c = 2.65 +/- 0.04 R-circle plus, and a 3 sigma upper mass limit of 8.5 M-circle plus. From the high-precision photometry we obtain radius uncertainties of similar to 1.6 per cent, allowing us to conduct internal structure and atmospheric escape modelling. TOI-1064 b is one of the densest, well-characterized sub-Neptunes, with a tenuous atmosphere that can be explained by the loss of a primordial envelope following migration through the protoplanetary disc. It is likely that TOI-1064 c has an extended atmosphere due to the tentative low density, however further radial velocities are needed to confirm this scenario and the similar radii, different masses nature of this system. The high-precision data and modelling of TOI-1064 b are important for planets in this region of mass-radius space, and it allow us to identify a trend in bulk density-stellar metallicity for massive sub-Neptunes that may hint at the formation of this population of planets.
techniques: radial velocities
planets and satellites: detection
stars: individual: TOI-1064 (TIC 79748331, Gaia EDR3 6683371847364921088)
planets and satellites: composition
planets and satellites: interiors
techniques: photometric
Författare
T.G. Wilson
University of St Andrews
Elisa Goffo
Universita degli Studi di Torino
Thüringer Landessternwarte Tautenburg
Yann Alibert
Universität Bern
D. Gandolfi
Universita degli Studi di Torino
Andrea Bonfanti
Österreichische Akademie der Wissenschaften
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
A. Collier Cameron
University of St Andrews
Malcolm Fridlund
Universiteit Leiden
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Luca Fossati
Österreichische Akademie der Wissenschaften
Judith Korth
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Willy Benz
Universität Bern
Adrien Deline
Université de Genève
Hans-Gustav Floren
Stockholms universitet
Pascal Guterman
Aix-Marseille Université
Institut National des Sciences de l'Univers
Vardan Adibekyan
Universidade do Porto
Matthew J. Hooton
Universität Bern
Sergio Hoyer
Laboratoire d'Astrophysique de Marseille
Adrien Leleu
Universität Bern
Université de Genève
Alexander James Mustill
Lunds universitet
Sebastien Salmon
Université de Genève
Sergio G. Sousa
Universidade do Porto
Olga Suarez
Observatoire de la Cote d'Azur
Lyu Abe
Observatoire de la Cote d'Azur
Abdelkrim Agabi
Observatoire de la Cote d'Azur
Roi Alonso
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Guillem Anglada
Consejo Superior de Investigaciones Científicas (CSIC)
Institut d'Estudis Espacials de Catalunya (IEEC)
Joel Asquier
European Space Research and Technology Centre (ESA ESTEC)
Tamas Barczy
Admatis
David Barrado Navascues
Centro de Astrobiología (INTA-CSIC)
Susana C. C. Barros
Universidade do Porto
Wolfgang Baumjohann
Österreichische Akademie der Wissenschaften
Mathias Beck
Université de Genève
Thomas Beck
Universität Bern
Nicolas Billot
Université de Genève
Xavier Bonfils
Université Grenoble Alpes
Alexis Brandeker
Stockholms universitet
Christopher Broeg
Universität Bern
Edward M. Bryant
The University of Warwick
Matthew R. Burleigh
University Of Leicester
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Sebastien Charnoz
Université Paris Descartes
David R. Ciardi
California Institute of Technology (Caltech)
Ryan Cloutier
Harvard-Smithsonian Center for Astrophysics
William D. Cochran
The University of Texas at Austin
Karen A. Collins
Harvard-Smithsonian Center for Astrophysics
Knicole D. Colon
NASA Goddard Space Flight Center
Nicolas Crouzet
European Space Research and Technology Centre (ESA ESTEC)
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Melvyn B. Davies
Lunds universitet
Magali Deleuil
Aix-Marseille Université
Laetitia Delrez
Universite de Liège
Olivier Demangeon
Universidade do Porto
Brice-Olivier Demory
Universität Bern
Diana Dragomir
University of New Mexico
Georgina Dransfield
University of Birmingham
David Ehrenreich
Université de Genève
Anders Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Andrea Fortier
Universität Bern
Tianjun Gan
Tsinghua University
Samuel Gill
The University of Warwick
Michael Gillon
Universite de Liège
Crystal L. Gnilka
NASA Ames Research Center
Nolan Grieves
Université de Genève
Sascha Grziwa
Universität zu Köln
Manuel Gudel
Universität Wien
Tristan Guillot
Observatoire de la Cote d'Azur
Jonas Haldemann
Universität Bern
Kevin Heng
The University of Warwick
Universität Bern
Keith Horne
University of St Andrews
Steve B. Howell
NASA Ames Research Center
Kate G. Isaak
European Space Research and Technology Centre (ESA ESTEC)
Jon M. Jenkins
NASA Ames Research Center
Eric L. N. Jensen
Swarthmore College
Laszlo Kiss
Magyar Tudomanyos Akademia
Gaia Lacedelli
Università di Padova
Istituto nazionale di astrofisica (INAF)
Kristine Lam
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Jacques Laskar
Sorbonne Université
David W. Latham
Harvard-Smithsonian Center for Astrophysics
Alain Lecavelier des Etangs
Sorbonne Université
Monika Lendl
Université de Genève
Lester
NASA Ames Research Center
Alan M. Levine
Massachusetts Institute of Technology (MIT)
John Livingston
University of Tokyo
Christophe Lovis
Université de Genève
Rafael Luque
Instituto de Astrofisica de Andalucía (IAA)
Demetrio Magrin
Istituto nazionale di astrofisica (INAF)
Pierre F. L. Maxted
Keele University
Andrew W. Mayo
University of California
Brian McLean
Space Telescope Science Institute (STScI)
Marko Mecina
Universität Wien
Djamel Mekarnia
Observatoire de la Cote d'Azur
Valerio Nascimbeni
Istituto nazionale di astrofisica (INAF)
Louise D. Nielsen
University of Oxford
Goran Olofsson
Stockholms universitet
Hugh P. Osborn
Universität Bern
Massachusetts Institute of Technology (MIT)
Hannah L. M. Osborne
University College London (UCL)
Roland Ottensamer
Universität Wien
Isabella Pagano
Istituto nazionale di astrofisica (INAF)
Enric Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Gisbert Peter
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Giampaolo Piotto
Università di Padova
Istituto nazionale di astrofisica (INAF)
Don Pollacco
The University of Warwick
Didier Queloz
University of Cambridge
Université de Genève
Roberto Ragazzoni
Istituto nazionale di astrofisica (INAF)
Università di Padova
Nicola Rando
European Space Research and Technology Centre (ESA ESTEC)
Heike Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Freie Universität Berlin
Technische Universität Berlin
Seth Redfield
Wesleyan University
Ignasi Ribas
Institut d'Estudis Espacials de Catalunya (IEEC)
Consejo Superior de Investigaciones Científicas (CSIC)
George R. Ricker
Massachusetts Institute of Technology (MIT)
Martin Rieder
Universität Bern
Nuno C. Santos
Universidade do Porto
Gaetano Scandariato
Istituto nazionale di astrofisica (INAF)
Francois-Xavier Schmider
Observatoire de la Cote d'Azur
Richard P. Schwarz
Patashnick Voorheesville Observatory
Nicholas J. Scott
NASA Ames Research Center
Sara Seager
Massachusetts Institute of Technology (MIT)
Damien Segransan
Université de Genève
Luisa Maria Serrano
Universita degli Studi di Torino
Attila E. Simon
Universität Bern
Alexis M. S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Manfred Steller
Österreichische Akademie der Wissenschaften
Chris Stockdale
Hazelwood Observatory
Gyula Szabo
Eötvös Loránd University (ELTE)
Nicolas Thomas
Universität Bern
Eric B. Ting
NASA Ames Research Center
Amaury H. M. J. Triaud
University of Birmingham
Stephane Udry
Université de Genève
Vincent Van Eylen
University College London (UCL)
Valerie Van Grootel
Universite de Liège
Roland K. Vanderspek
Massachusetts Institute of Technology (MIT)
Valentina Viotto
Istituto nazionale di astrofisica (INAF)
Nicholas Walton
University of Cambridge
Joshua N. Winn
Princeton University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 511 1 1043-1071Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1093/mnras/stab3799