TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf
Artikel i vetenskaplig tidskrift, 2023

We present the discovery of two exoplanets transiting TOI-836 (TIC 440887364) using data from TESS Sector 11 and Sector 38. TOI-836 is a bright (T = 8.5 mag), high proper motion (∼200 mas yr−1), low metallicity ([Fe/H]≈−0.28) K-dwarf with a mass of 0.68 ± 0.05 M and a radius of 0.67 ± 0.01 R. We obtain photometric follow-up observations with a variety of facilities, and we use these data sets to determine that the inner planet, TOI-836 b, is a 1.70 ± 0.07 R super-Earth in a 3.82-d orbit, placing it directly within the so-called ‘radius valley’. The outer planet, TOI-836 c, is a 2.59 ± 0.09 R mini-Neptune in an 8.60-d orbit. Radial velocity measurements reveal that TOI-836 b has a mass of 4.5 ± 0.9 M, while TOI-836 c has a mass of 9.6 ± 2.6 M. Photometric observations show Transit Timing Variations (TTVs) on the order of 20 min for TOI-836 c, although there are no detectable TTVs for TOI-836 b. The TTVs of planet TOI-836 c may be caused by an undetected exterior planet.

planets and satellites: detection

techniques: radial velocities

stars: individual: TOI-836 (TIC 440887364, GAIA EDR3 6230733559097425152)

techniques: photometric

Författare

F. Hawthorn

The University of Warwick

D. Bayliss

The University of Warwick

T.G. Wilson

University of St Andrews

A. Bonfanti

Institut fur Weltraumforschung

V. Adibekyan

Universidade do Porto

Y. Alibert

Universität Bern

S. G. Sousa

Universidade do Porto

K. A. Collins

Harvard-Smithsonian Center for Astrophysics

E. Bryant

The University of Warwick

A. Osborn

The University of Warwick

D. J. Armstrong

The University of Warwick

L. Abe

Observatoire de la Cote d'Azur

J.S. Acton

University Of Leicester

Brett C Addison

University of Southern Queensland

Karim Agabi

Observatoire de la Cote d'Azur

R. Alonso

Universidad de la Laguna

Instituto de Astrofísica de Canarias

Douglas R. Alves

Universidad de Chile (UCH)

G. Anglada Escude´

Institut d'Estudis Espacials de Catalunya (IEEC)

Institut de Ciències de l'Espai (ICE) - CSIC

T. Bárczy

Admatis

Thomas Barclay

NASA Goddard Space Flight Center

University of Maryland

D. Barrado

Centro de Astrobiologia (CAB)

S.C.C. Barros

Universidade do Porto

W. Baumjohann

Institut fur Weltraumforschung

Philippe Bendjoya

Observatoire de la Cote d'Azur

W. Benz

Universität Bern

Allyson Bieryla

Harvard-Smithsonian Center for Astrophysics

X. Bonfils

Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)

François Bouchy

Université de Genève

A. Brandeker

Stockholms universitet

C. Broeg

Universität Bern

David J.A. Brown

The University of Warwick

Matt Burleigh

University Of Leicester

M. Buttu

Programma Nazionale di Ricerche in Antartide (PNRA)

Juan Cabrera

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

D. A. Caldwell

NASA Ames Research Center

Sarah Casewell

University Of Leicester

D. Charbonneau

Harvard-Smithsonian Center for Astrophysics

S. Charnoz

Institut de Physique du Globe de Paris

R. Cloutier

Harvard-Smithsonian Center for Astrophysics

A. Collier Cameron

University of St Andrews

K. I. Collins

George Mason University

D. Conti

American Association of Variable Star Observers

N. Crouzet

European Space Research and Technology Centre (ESA ESTEC)

Szilárd Czismadia

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

M. B. Davies

Lunds universitet

M. Deleuil

Laboratoire d'Astrophysique de Marseille

E. Delgado Mena

Universidade do Porto

L. Delrez

Universite de Liège

O. Demangeon

Universidade do Porto

B.O. Demory

Universität Bern

Georgina Dransfield

University of Birmingham

X. Dumusque

Université de Genève

J. A. Egger

Universität Bern

D. Ehrenreich

Université de Genève

P. Eigmüller

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Anders Erickson

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Zahra Essack

Massachusetts Institute of Technology (MIT)

A. Fortier

Universität Bern

L. Fossati

Institut fur Weltraumforschung

Malcolm Fridlund

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

Universiteit Leiden

Maximilian N. Günther

European Space Research and Technology Centre (ESA ESTEC)

M. Gudel

Universität Wien

D. Gandolfi

Universita degli Studi di Torino

Harvey Gillard

The University of Warwick

Michaël Gillon

Universite de Liège

Crystal Gnilka

NASA Ames Research Center

National Aeronautics and Space Administration (NASA)

M.R. Goad

University Of Leicester

Robert Goeke

Massachusetts Institute of Technology (MIT)

T. Guillot

Observatoire de la Cote d'Azur

A. Hadjigeorghiou

The University of Warwick

Coel Hellier

Keele University

B. Henderson

University Of Leicester

Kevin Heng

The University of Warwick

Universität Bern

M.J. Hooton

University of Cambridge

Universität Bern

Keith Horne

University of St Andrews

S. B. Howell

NASA Ames Research Center

S. Hoyer

Laboratoire d'Astrophysique de Marseille

J. M. Irwin

Harvard-Smithsonian Center for Astrophysics

James S. Jenkins

Universidad Diego Portales

Centro de Astrofísica y Tecnologías Afines (CATA),

Jon M. Jenkins

NASA Ames Research Center

Eric L.N. Jensen

Swarthmore College

S. R. Kane

University of California

Alicia Kendall

University Of Leicester

J. F. Kielkopf

University of Louisville

L.L. Kiss

Magyar Tudomanyos Akademia

Eötvös Loránd University (ELTE)

G. Lacedelli

Istituto nazionale di astrofisica (INAF)

J. Laskar

Observatoire de Paris

D. W. Latham

Harvard-Smithsonian Center for Astrophysics

A. L. des Etangs

Institut d 'Astrophysique de Paris

A. Leleu

Université de Genève

Universität Bern

M. Lendl

Université de Genève

J. Lillo-Box

Centro de Astrobiologia (CAB)

C. Lovis

Université de Genève

Djamel Mékarnia

Observatoire de la Cote d'Azur

Bob Massey

Villa’39 Observatory

Tamzin Masters

The University of Warwick

P. Maxted

Keele University

Valerio Nascimbeni

Istituto nazionale di astrofisica (INAF)

L. D. Nielsen

European Southern Observatory (ESO)

Sean M. O’Brien

Queen's University Belfast

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 520 3 3649-3668

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1093/mnras/stad306

Mer information

Senast uppdaterat

2024-07-03