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Discovery of a cold giant planet and mass measurement of a hot super-Earth in the multi-planetary system WASP-132
Bayliss, Daniel; Armstrong, David J.; Lendl, Monika +25 more
Hot Jupiters generally do not have nearby planet companions, as they may have cleared out other planets during their inward migration from more distant orbits. This gives evidence that hot Jupiters more often migrate inward via high-eccentricity migration due to dynamical interactions between planets rather than more dynamically cool migration mec…
A closer look at LTT 9779b:The ESPRESSO endeavour to pierce the atmospheric veil
Palle, E.; López-Morales, M.; Jenkins, J. S. +9 more
Context. The proliferation of exoplanet discoveries, particularly within such exotic environments as the Neptune desert, challenges our understanding of planetary atmospheres undergoing intense irradiation. The unexpected discovery of LTT 9779 b, an ultra-hot Neptune deep within this desert offers a prime opportunity for in-depth atmospheric studi…
CHEOPS observations confirm nodal precession in the WASP-33 system
Alonso, R.; Deleuil, M.; Erikson, A. +86 more
Aims. We aim to observe the transits and occultations of WASP-33 b, which orbits a rapidly rotating δ Scuti pulsator, with the goal of measuring the orbital obliquity via the gravity-darkening effect, and constraining the geometric albedo via the occultation depth. Methods. We observed four transits and four occultations with CHEOPS, and employ a …
Transit-timing variations in the AU Mic system observed with CHEOPS
Guterman, P.; Alonso, R.; Deleuil, M. +86 more
Context. AU Mic is a very active M dwarf star with an edge-on debris disk and two known transiting sub-Neptunes with a possible third planetary companion. The two transiting planets exhibit significant transit-timing variations (TTVs) that are caused by the gravi tational interaction between the bodies in the system. Aims. Using photometrical obse…