AGOL, Eric; CAREY, Sean; DELREZ, Laetitia; DEMORY, Brice-Olivier; FABRYCKY, Dan; GILLON, Michael; GRIMM, Simon; INGALLS, Jim; MALHOTRA, Renu; MORRIS, Brett; RAYMOND, Sean N.; TRIAUD, Amaury; BOLMONT, Emeline; BURGASSER, Adam

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AGOL, Eric
University of Washington [Seattle]

CAREY, Sean

DELREZ, Laetitia
Cavendish Laboratory

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2019

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With the Spitzer Space Telescope, we have discovered a system of seven transiting planets about the star TRAPPIST-1, and for the first time measured the densities of three Earth-sized, temperate exoplanets using transit-timing variations (Gillon et al. 2017; Ducrot et al. 2018; Grimm et al. 2018). We propose to gather additional transits of the TRAPPIST-1 system, focusing on the outer planets in the system which have had fewer transits observed to date. The four-fold goals of this proposal are: i). to flag potential transits which might be affected by stellar variability; ii). to constrain the dynamical state of the planet system; iii). to better constrain the masses of the planets; iv). to tighten the ephemeris forecast for observations with JWST. In addition, we will search for any evidence an eighth planet, characterize the stellar variability, and forecast planet-planet overlaps during transits. The proposed observations contain measurements which are only possible in March-April 2019, and so we request a time critical review to the extent possible.< Leer menos

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Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804