A CHEOPS-enhanced view of the HD 3167 system
Artikel i vetenskaplig tidskrift, 2022
Much remains to be understood about the nature of exoplanets smaller than Neptune, most of which have been discovered in compact multi-planet systems. With its inner ultra-short period planet b aligned with the star and two larger outer planets d-c on polar orbits, the multi-planet system HD 3167 features a peculiar architecture and offers the possibility to investigate both dynamical and atmospheric evolution processes. To this purpose we combined multiple datasets of transit photometry and radial velocimetry (RV) to revise the properties of the system and inform models of its planets. This effort was spearheaded by CHEOPS observations of HD 3167b, which appear inconsistent with a purely rocky composition despite its extreme irradiation. Overall the precision on the planetary orbital periods are improved by an order of magnitude, and the uncertainties on the densities of the transiting planets b and c are decreased by a factor of 3. Internal structure and atmospheric simulations draw a contrasting picture between HD 3167d, likely a rocky super-Earth that lost its atmosphere through photo-evaporation, and HD 3167c, a mini-Neptune that kept a substantial primordial gaseous envelope. We detect a fourth, more massive planet on a larger orbit, likely coplanar with HD 3167d-c. Dynamical simulations indeed show that the outer planetary system d-c-e was tilted, as a whole, early in the system history, when HD 3167b was still dominated by the star influence and maintained its aligned orbit. RV data and direct imaging rule out that the companion that could be responsible for the present-day architecture is still bound to the HD 3167 system. Similar global studies of multi-planet systems will tell how many share the peculiar properties of the HD 3167 system, which remains a target of choice for follow-up observations and simulations.
Techniques: photometric
Planets and satellites: individual: HD 3167
Planets and satellites: dynamical evolution and stability
Planet-star interactions
Techniques: radial velocities
Planets and satellites: physical evolution
Författare
V. Bourrier
Université de Genève
A. Deline
Université de Genève
A. Krenn
Institut fur Weltraumforschung
J. A. Egger
Universität Bern
A. C. Petit
Köpenhamns universitet
L. Malavolta
Istituto nazionale di astrofisica (INAF)
Università di Padova
M. Cretignier
Université de Genève
N. Billot
Université de Genève
C. Broeg
Universität Bern
H.-G. Florén
Stockholms universitet
D. Queloz
Eidgenössische Technische Hochschule Zürich (ETH)
University of Cambridge
Y. Alibert
Universität Bern
A. Bonfanti
Institut fur Weltraumforschung
A. S. Bonomo
Istituto nazionale di astrofisica (INAF)
J. B. Delisle
Université de Genève
O. Demangeon
Universidade do Porto
B.O. Demory
Universität Bern
X. Dumusque
Université de Genève
D. Ehrenreich
Université de Genève
R. D. Haywood
University of Cambridge
S.B. Howell
NASA Ames Research Center
M. Lendl
Université de Genève
A. Mortier
University of Cambridge
G. Nigro
Università di Padova
Istituto nazionale di astrofisica (INAF)
S. Salmon
Université de Genève
S.G. Sousa
Universidade do Porto
T.G. Wilson
University of St Andrews
V. Adibekyan
Universidade do Porto
University of St Andrews
R. Alonso
Universidad de la Laguna
Instituto de Astrofísica de Canarias
G. Anglada
Institut de Ciències de l'Espai (ICE) - CSIC
Institut d'Estudis Espacials de Catalunya (IEEC)
T. Bárczy
Admatis
D. Barrado
Centro de Astrobiologia (CAB)
S.C.C. Barros
Universidade do Porto
W. Baumjohann
Institut fur Weltraumforschung
M. Beck
Université de Genève
W. Benz
Universität Bern
F. Biondi
Istituto nazionale di astrofisica (INAF)
X. Bonfils
Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
A. Brandeker
Stockholms universitet
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Charnoz
Institut de Physique du Globe de Paris
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
A. Collier Cameron
University of St Andrews
Mario Damasso
University of Exeter
M. B. Davies
Lunds universitet
M. Deleuil
Laboratoire d'Astrophysique de Marseille
L. Delrez
Universite de Liège
L. Di Fabrizio
Istituto nazionale di astrofisica (INAF)
Anders Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
A. Fortier
Universität Bern
L. Fossati
Institut fur Weltraumforschung
Malcolm Fridlund
Universiteit Leiden
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
D. Gandolfi
Universita degli Studi di Torino
Michaël Gillon
Universite de Liège
M. Gudel
Universität Wien
Kevin Heng
The University of Warwick
Universität Bern
S. Hoyer
Laboratoire d'Astrophysique de Marseille
K. Isaak
European Space Research and Technology Centre (ESA ESTEC)
L. Kiss
Magyar Tudomanyos Akademia
Eötvös Loránd University (ELTE)
J. Laskar
Observatoire de Paris
A. L. des Etangs
Institut d 'Astrophysique de Paris
V. Lorenzi
Instituto de Astrofísica de Canarias
Istituto nazionale di astrofisica (INAF)
C. Lovis
Université de Genève
D. Magrin
Istituto nazionale di astrofisica (INAF)
A. Massa
Universita degli Studi di Torino
P. Maxted
Keele University
Valerio Nascimbeni
Istituto nazionale di astrofisica (INAF)
G. Olofsson
Stockholms universitet
R. Ottensamer
Universität Wien
I. Pagano
Istituto nazionale di astrofisica (INAF)
Enric Palle
Instituto de Astrofísica de Canarias
Universidad de la Laguna
G. Peter
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Giampaolo P. Piotto
Università di Padova
Istituto nazionale di astrofisica (INAF)
Don L. Pollacco
The University of Warwick
Roberto Ragazzoni
Istituto nazionale di astrofisica (INAF)
Università di Padova
N. Rando
European Space Research and Technology Centre (ESA ESTEC)
H. Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Freie Universität Berlin
Technische Universität Berlin
I. Ribas
Institut d'Estudis Espacials de Catalunya (IEEC)
Institut de Ciències de l'Espai (ICE) - CSIC
N. C. Santos
Universidade do Porto
Gaetano Scandariato
Istituto nazionale di astrofisica (INAF)
D. Segransan
Université de Genève
A.E. Simon
Universität Bern
Alexis M. S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Manfred B. Steller
Institut fur Weltraumforschung
G.M. Szabó
Eötvös Loránd University (ELTE)
Nicolas Thomas
Universität Bern
S. Udry
Université de Genève
V. Van Grootel
Universite de Liège
F. Verrecchia
Osservatorio Astronomico di Roma
Agenzia Spaziale Italiana
N. A. Walton
University of Cambridge
T. Beck
Universität Bern
M. Buder
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
F. Ratti
European Space Research and Technology Centre (ESA ESTEC)
B. Ulmer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
V. Viotto
Istituto nazionale di astrofisica (INAF)
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 668 A31Ämneskategorier
Datorteknik
Astronomi, astrofysik och kosmologi
Inbäddad systemteknik
DOI
10.1051/0004-6361/202243778