Afficher la notice abrégée

Refining the transit timing and photometric analysis of TRAPPIST-1: Masses, radii, densities, dynamics, and ephemerides

dc.contributor.authorAGOL, Eric
dc.contributor.authorDORN, Caroline
dc.contributor.authorGRIMM, Simon L.
dc.contributor.authorTURBET, Martin
dc.contributor.authorDUCROT, Elsa
dc.contributor.authorDELREZ, Laetitia
dc.contributor.authorGILLON, Michael
dc.contributor.authorDEMORY, Brice-Olivier
dc.contributor.authorBURDANOV, Artem
dc.contributor.authorBARKAOUI, Khalid
dc.contributor.authorBENKHALDOUN, Zouhair
dc.contributor.authorBOLMONT, Emeline
dc.contributor.authorBURGASSER, Adam
dc.contributor.authorCAREY, Sean
dc.contributor.authorDE WIT, Julien
dc.contributor.authorFABRYCKY, Daniel
dc.contributor.authorFOREMAN-MACKEY, Daniel
dc.contributor.authorHALDEMANN, Jonas
dc.contributor.authorHERNANDEZ, David M.
dc.contributor.authorINGALLS, James
dc.contributor.authorJEHIN, Emmanuel
dc.contributor.authorLANGFORD, Zachary
dc.contributor.authorLECONTE, Jérémy
dc.contributor.authorLEDERER, Susan M.
dc.contributor.authorLUGER, Rodrigo
dc.contributor.authorMALHOTRA, Renu
dc.contributor.authorMEADOWS, Victoria S.
dc.contributor.authorMORRIS, Brett M.
dc.contributor.authorPOZUELOS, Francisco J.
dc.contributor.authorQUELOZ, Didier
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorRAYMOND, Sean N.
dc.contributor.authorSELSIS, Franck
dc.contributor.authorSESTOVIC, Marko
dc.contributor.authorTRIAUD, Amaury H. M. J.
dc.contributor.authorVAN GROOTEL, Valerie
dc.date.accessioned2021-07-07T15:42:33Z
dc.date.available2021-07-07T15:42:33Z
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/95183
dc.description.abstractEnWe have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST and K2 transit time measurements, and revisit an N-body dynamical analysis of the seven-planet system using our complete set of times from which we refine the mass ratios of the planets to the star. We next carry out a photodynamical analysis of the Spitzer light curves to derive the density of the host star and the planet densities. We find that all seven planets' densities may be described with a single rocky mass-radius relation which is depleted in iron relative to Earth, with Fe 21 wt% versus 32 wt% for Earth, and otherwise Earth-like in composition. Alternatively, the planets may have an Earth-like composition, but enhanced in light elements, such as a surface water layer or a core-free structure with oxidized iron in the mantle. We measure planet masses to a precision of 3-5%, equivalent to a radial-velocity (RV) precision of 2.5 cm/sec, or two orders of magnitude more precise than current RV capabilities. We find the eccentricities of the planets are very small; the orbits are extremely coplanar; and the system is stable on 10 Myr timescales. We find evidence of infrequent timing outliers which we cannot explain with an eighth planet; we instead account for the outliers using a robust likelihood function. We forecast JWST timing observations, and speculate on possible implications of the planet densities for the formation, migration and evolution of the planet system.
dc.language.isoen
dc.title.enRefining the transit timing and photometric analysis of TRAPPIST-1: Masses, radii, densities, dynamics, and ephemerides
dc.typeDocument de travail - Pré-publication
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv2010.01074
bordeaux.hal.laboratoriesLaboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804*
bordeaux.institutionCNRS
bordeaux.institutionUniversité de Bordeaux
hal.identifierhal-02997971
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02997971v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=AGOL,%20Eric&DORN,%20Caroline&GRIMM,%20Simon%20L.&TURBET,%20Martin&DUCROT,%20Elsa&rft.genre=preprint


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée