TOI-178: a window into the formation and evolution of planetary systems
Matthew J. Hooton
,
Chloe Fisher
,
Yann Alibert
,
Nathan Hara
,
Kevin Heng
,
Adrien Leleu
,
Enric Palle
,
Thomas G. Wilson
,
Vardan Adibekyan
,
Romain Allart
,
Susana C. C. Barros
,
Nicolas Billot
,
Gwenaël Boué
(1)
,
Vincent Bourrier
,
Alexis Brandeker
,
Giovanni Bruno
,
Alexandre C. M. Correia
,
Brice-Olivier Demory
,
David Ehrenreich
,
Néstor Espinoza
,
Luca Fossati
,
Malcolm Fridlund
,
Jonas Haldemann
,
Sergio Hoyer
,
Daniel Kitzmann
,
Baptiste Lavie
,
Monika Lendl
,
Jorge Lillo-Box
,
Brett Morris
,
Hugh Osborn
,
Mahmoudreza Oshagh
,
Carina Persson
,
Francisco J. Pozuelos
,
Carlos Allende-Prieto
,
Nuno Santos
,
Jean Schneider
(1)
,
Alessandro Sozzetti
Matthew J. Hooton
- Fonction : Auteur
Chloe Fisher
- Fonction : Auteur
Yann Alibert
- Fonction : Auteur
Kevin Heng
- Fonction : Auteur
Adrien Leleu
- Fonction : Auteur
Enric Palle
- Fonction : Auteur
Thomas G. Wilson
- Fonction : Auteur
Vardan Adibekyan
- Fonction : Auteur
Romain Allart
- Fonction : Auteur
Susana C. C. Barros
- Fonction : Auteur
Nicolas Billot
- Fonction : Auteur
Vincent Bourrier
- Fonction : Auteur
Alexis Brandeker
- Fonction : Auteur
Giovanni Bruno
- Fonction : Auteur
Alexandre C. M. Correia
- Fonction : Auteur
Brice-Olivier Demory
- Fonction : Auteur
David Ehrenreich
- Fonction : Auteur
Néstor Espinoza
- Fonction : Auteur
Luca Fossati
- Fonction : Auteur
Malcolm Fridlund
- Fonction : Auteur
Jonas Haldemann
- Fonction : Auteur
Sergio Hoyer
- Fonction : Auteur
Daniel Kitzmann
- Fonction : Auteur
Baptiste Lavie
- Fonction : Auteur
Monika Lendl
- Fonction : Auteur
Jorge Lillo-Box
- Fonction : Auteur
Brett Morris
- Fonction : Auteur
Hugh Osborn
- Fonction : Auteur
Mahmoudreza Oshagh
- Fonction : Auteur
Carina Persson
- Fonction : Auteur
Francisco J. Pozuelos
- Fonction : Auteur
Carlos Allende-Prieto
- Fonction : Auteur
Nuno Santos
- Fonction : Auteur
Alessandro Sozzetti
- Fonction : Auteur
Résumé
Laplacian resonant chains — where astronomical bodies are in mean motion resonance with two or more other bodies — are rare phenomena observed in systems such as the TRAPPIST-1 exoplanets and the Galilean moons of Jupiter. Laplacian chains are an important tool to study the history of planetary systems occupying this configuration, as the fragility of the chain significantly constrains the possible pathways through which the planets can form and evolve. Whilst initial TESS observations suggested that TOI-178 — a nearby system of exoplanets orbiting a relatively cool K-dwarf — hosted the first known planets occupying a horseshoe-coorbital configuration, follow-up observations by CHEOPS, NGTS and SPECULOOS revealed a compact system of six transiting exoplanets all smaller than Neptune: five of which form a chain of Laplacian resonance. Precise measurements of the host's radial velocity using the ESPRESSO spectrograph revealed uncommon planet-to-planet density variations: a stark departure from the monotonic decrease in density with orbital separation common to most systems. JWST time awarded in Cycle 1 to acquire transmission spectroscopy of planets b, d and g promises to make the evolution of the TOI-178 planets amongst the best-understood of any planetary system for the foreseeable future.
Domaines
Planète et Univers [physics]Format du dépôt | Notice |
---|---|
Type de dépôt | Communication dans un congrès |
Titre |
en
TOI-178: a window into the formation and evolution of planetary systems
|
Résumé |
en
Laplacian resonant chains — where astronomical bodies are in mean motion resonance with two or more other bodies — are rare phenomena observed in systems such as the TRAPPIST-1 exoplanets and the Galilean moons of Jupiter. Laplacian chains are an important tool to study the history of planetary systems occupying this configuration, as the fragility of the chain significantly constrains the possible pathways through which the planets can form and evolve. Whilst initial TESS observations suggested that TOI-178 — a nearby system of exoplanets orbiting a relatively cool K-dwarf — hosted the first known planets occupying a horseshoe-coorbital configuration, follow-up observations by CHEOPS, NGTS and SPECULOOS revealed a compact system of six transiting exoplanets all smaller than Neptune: five of which form a chain of Laplacian resonance. Precise measurements of the host's radial velocity using the ESPRESSO spectrograph revealed uncommon planet-to-planet density variations: a stark departure from the monotonic decrease in density with orbital separation common to most systems. JWST time awarded in Cycle 1 to acquire transmission spectroscopy of planets b, d and g promises to make the evolution of the TOI-178 planets amongst the best-understood of any planetary system for the foreseeable future.
|
Auteur(s) |
Matthew J. Hooton
, Chloe Fisher
, Yann Alibert
, Nathan Hara
, Kevin Heng
, Adrien Leleu
, Enric Palle
, Thomas G. Wilson
, Vardan Adibekyan
, Romain Allart
, Susana C. C. Barros
, Nicolas Billot
, Gwenaël Boué
1
, Vincent Bourrier
, Alexis Brandeker
, Giovanni Bruno
, Alexandre C. M. Correia
, Brice-Olivier Demory
, David Ehrenreich
, Néstor Espinoza
, Luca Fossati
, Malcolm Fridlund
, Jonas Haldemann
, Sergio Hoyer
, Daniel Kitzmann
, Baptiste Lavie
, Monika Lendl
, Jorge Lillo-Box
, Brett Morris
, Hugh Osborn
, Mahmoudreza Oshagh
, Carina Persson
, Francisco J. Pozuelos
, Carlos Allende-Prieto
, Nuno Santos
, Jean Schneider
1
, Alessandro Sozzetti
1
Observatoire de Paris
( 300055 )
- 61 Av de l'Observatoire 75014 PARIS
- France
|
Comité de lecture |
Oui
|
Langue du document |
Anglais
|
Vulgarisation |
Non
|
Audience |
Internationale
|
Actes |
Oui
|
Date de publication |
2022
|
Volume |
54
|
Titre du congrès |
AASTCS9, Exoplanets 4, id. 102.394. Bulletin of the American Astronomical Society
|
Date début congrès |
2022
|
Ville |
à renseigner
|
Pays |
zz
|
Domaine(s) |
|
ADS Id | 2022BAAS...54e.394H |
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