Séminaire Exoplanètes / |
| « HIP 41378 multi-planetary system: a testbed for long-period planets analysis with PLATO » |
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Salomé Grouffal |
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HIP41378 is a fascinating system hosting at least 5 exoplanets discovered by the K2 mission in 2016. The study of this system is a unique opportunity to prepare the PLATO mission for 3 main reasons: the star is bright (V=8.9), the planets are transiting, and they have long orbital periods (from 2 weeks to 1.5 years). Particularly, HIP41378f, a 'Super-Puff' planet with a Saturn-like size and temperate climate, stands out due to its unusually low density, which is not fully understood yet. Comparative planetology will be crucial to comprehend its nature.
Ground-based follow-up observations over several years have led to a new understanding of the system's configuration. This system's analysis requires combining multiple observation techniques, including high-precision photometry and radial velocity measurements, transit-timing variations analysis, the Rossiter-McLaughlin effect, and stellar variability correction. These techniques will be essential for analysing PLATO's planetary systems. This talk will provide an update on the latest findings on this system, including the strategy adopted for the worldwide observation campaign focused on the long-duration transit of HIP41378f. |
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mardi 2 juillet 2024 - 14:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |