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Transit timing variations in the WASP-4 planetary system

dc.contributor.authorSOUTHWORTH, John
dc.contributor.authorDOMINIK, M.
hal.structure.identifierUniversity of Copenhagen = Københavns Universitet [UCPH]
dc.contributor.authorJØRGENSEN, U. G.
hal.structure.identifierUniversity of Copenhagen = Københavns Universitet [UCPH]
dc.contributor.authorANDERSEN, M. I.
dc.contributor.authorBOZZA, V.
dc.contributor.authorBURGDORF, M. J.
dc.contributor.authorD'AGO, G.
hal.structure.identifierFORMATION STELLAIRE 2019
dc.contributor.authorDIB, Sami
dc.contributor.authorFIGUERA JAIMES, R.
dc.contributor.authorFUJII, Y. I.
dc.contributor.authorGILL, S.
hal.structure.identifierDepartment of Physics [Helsinki]
dc.contributor.authorHAIKALA, L. K.
dc.contributor.authorHINSE, T. C.
dc.contributor.authorHUNDERTMARK, M.
dc.contributor.authorKHALOUEI, E.
hal.structure.identifierKuopio Unit [FMI]
dc.contributor.authorKORHONEN, H.
dc.contributor.authorLONGA-PENA, P.
dc.contributor.authorMANCINI, L.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA]
dc.contributor.authorPEIXINHO, N.
hal.structure.identifierInstituto de Astrofisica de Canarias [IAC]
dc.contributor.authorRABUS, M.
hal.structure.identifierDepartment of Physics [Tehran]
dc.contributor.authorRAHVAR, S.
dc.contributor.authorSAJADIAN, S.
dc.contributor.authorSKOTTFELT, J.
hal.structure.identifierMax-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
dc.contributor.authorSNODGRASS, C.
dc.contributor.authorSPYRATOS, P.
dc.contributor.authorTREGLOAN-REED, J.
hal.structure.identifierInstituto de Astronomıa
dc.contributor.authorUNDA-SANZANA, E.
dc.contributor.authorVON ESSEN, C.
dc.date.issued2019
dc.identifier.issn1745-3933
dc.description.abstractEnTransits in the planetary system WASP-4 were recently found to occur 80s earlier than expected in observations from the TESS satellite. We present 22 new times of mid-transit that confirm the existence of transit timing variations, and are well fitted by a quadratic ephemeris with period decay (-1.95 +/- 0.23) x 10^{-10} d per orbital period. We rule out instrumental issues, stellar activity, the Applegate mechanism and tidal effects as possible causes. The light-time effect is also not favoured. Apsidal precession is plausible but unproven. WASP-4b is only the third transiting hot Jupiter known to show transit timing variations to high confidence.
dc.language.isoen
dc.publisherOxford Journals
dc.subject.enAstrophysics - Earth and Planetary Astrophysics
dc.title.enTransit timing variations in the WASP-4 planetary system
dc.typeArticle de revue
dc.identifier.doi10.1093/mnras/stz2602
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
dc.identifier.arxiv1907.08269
bordeaux.journalMonthly Notices of the Royal Astronomical Society: Letters
bordeaux.pageMonthly Notices of the Royal Astronomical Society, Advance Access
bordeaux.peerReviewedoui
hal.identifierhal-02282388
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02282388v1
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