Stellar obliquity of gas giant planets

241016.StellarObliquityOfGasGiantPlanets

Jiří Zak

Astronomical Institute AS, Czech Republic

Mercoledì 16 Ottobre 2024, ore 11.00 – Sala Seminari Villa Magliola INAF-OATo

SEGUI IL SEMINARIO IN STREAMING

Abstract

The Rossiter-McLaughlin effect allows us to determine the stellar obliquity.
This parameter is indicative of formation and evolutionary pathways of exoplanetary systems. In this talk, I will present stellar obliquity measurements of six gas giant planets obtained with HARPS and discuss their potential histories.

Additionally, I will outline plans for upcoming atmospheric characterization using JWST and Ariel, highlighting how these observations will complement the obliquity findings.

Furthermore, I will show ESPRESSO time series of HD 110067c, resonant chain similar to TRAPPIST-1. The orbit of HD 110067c is well aligned.
This result is indicative that the current architecture of the system has been reached through convergent migration without any major disruptive events.

Finally, I detect rather small transit-timing variation in this system for the first time from a significant offset of 19 minutes.

Referente locale: Diego Turrini