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: photometric

planets and satellites: composition

stars: individual: TOI-1064 (TIC 79748331, Gaia EDR3 6683371847364921088)

planets and satellites: interiors

techniques: radial velocities

planets and satellites: detection

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

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik

Universiteit Leiden

Luca Fossati

Österreichische Akademie der Wissenschaften

Judith Korth

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Astronomi och plasmafysik 2

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

Universidad de la Laguna

Instituto de Astrofísica de Canarias

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

Universität Bern

The University of Warwick

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

Osservatorio Astronomico di Padova

Università di Padova

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

Université Pierre et Marie Curie (UPMC)

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

Osservatorio Astronomico di Padova

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

Osservatorio Astronomico di Padova

Louise D. Nielsen

University of Oxford

Goran Olofsson

Stockholms universitet

Hugh P. Osborn

Massachusetts Institute of Technology (MIT)

Universität Bern

Hannah L. M. Osborne

University College London (UCL)

Roland Ottensamer

Universität Wien

Isabella Pagano

Osservatorio Astrofisico di Catania

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

Osservatorio Astronomico di Padova

Don Pollacco

The University of Warwick

Didier Queloz

University of Cambridge

Université de Genève

Roberto Ragazzoni

Università di Padova

Osservatorio Astronomico di Padova

Nicola Rando

European Space Research and Technology Centre (ESA ESTEC)

Heike Rauer

Technische Universität Berlin

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Freie 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

Osservatorio Astrofisico di Catania

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

MTA-ELTE Lendület Milky Way Research Group

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

Osservatorio Astronomico di Padova

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 1043-1071

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1093/mnras/stab3799

Mer information

Senast uppdaterat

2022-04-07