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SUMMARY:The challenge of stellar activity in the era of PLATO - Dr Pia Cor
 tes Zuleta (St Andrews)
DTSTART:20251125T130000Z
DTEND:20251125T140000Z
UID:TALK240211@talks.cam.ac.uk
CONTACT:James Rogers
DESCRIPTION:One of the primary objectives of the upcoming PLATO mission is
  to identify Earth-like planets transiting Sun-like stars within the Habit
 able Zone. Achieving the mass precision required for internal structure ch
 aracterization of these planets requires addressing the challenge posed by
  stellar activity in RV data. State of the art methods\, such as Gaussian 
 Processes (GP)\, have become the standard procedure to model the stellar a
 ctivity contribution. However\, it is not yet clear how these methods affe
 ct the planet's mass measurement. In the context of PLATO\, planet candida
 tes will benefit from contemporary photometry alongside ground-based high-
 precision RVs\, providing a unique opportunity to include photometry in th
 e stellar activity model. In this talk\, we revisit the CoRoT-7 system—a
  young Sun-like star hosting three planets—using HARPS RV and CoRoT phot
 ometry. In this study we explore the integration of contemporaneous photom
 etry and RV data to model and mitigate stellar activity signals effectivel
 y\, and how this impacts the mass measurements of the three planets in thi
 s system using multi-dimensional GPs. \n
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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