Title of programme: Resolving the dynamical history of the hot Jupiter WASP-132b and its inner mini-Neptune companion
Abstract: With the exception of a few cases, stars with Hot Jupiters (HJs) rarely possess other close-in planets in the system. TESS has revealed another exceptional case of a mini-Neptune interior to the orbit of the known Hot Jupiter (HJ), WASP-132b. The existence of this mini-Neptune provides valuable insight into the formation mechanism and dynamical history of the HJ. We aim to understand the migration history and orbital architecture of the WASP-132 system using Rossiter-McLaughlin observations with our obtained time on ESPRESSO. By measuring the planets' spin-orbit angles, we will assess the coplanarity of their orbits and that of their star to understand their dynamical history. This science case requires timing precisions of around 2 mins, which in turn implies the acquisition of new precise photometric transit observation close to the ESPRESSO observations. CHEOPS observations of the transit of the mini-Neptune will enable refining its ephemeris and transit parameters, a goal that cannot be achieved by ground-based observations given the small transit depth and faint star. The improved radius precision obtained from CHEOPS in addition to our RV follow-up of the target will also allow constraining the internal structure of the planet.
Temporal Coverage
2022-06-04T19:06:55Z / 2022-06-05T05:34:00Z
Version
3.0
Mission Description
CHEOPS (Benz et al., https://doi.org/10.1007/s10686-020-09679-4) is a European Space Agency (ESA) mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden and the United Kingdom.
The satellite has a single payload comprising an ultra-high precision photometer covering the 330 - 1100 nm wavelength range in a single photometric band. Observations are made as part of the Guaranteed Time Observing Programme that is formulated by the CHEOPS Science Team, and the Guest Observers Programme through which the Community at large can apply for CHEOPS time.
