Observations of warm Jupiter orbital architectures as a test of giant planet migration theories – Elyar Sedaghati

Existence of close-in giants poses a difficult challenge to our understanding of planet formation. Such theories typically invoke migration beyond the snow line, through interactions with either the protoplanetary disk or an outer, eccentric companion. One way to test such theories is to observe their orbital architectures; namely eccentricity and obliquity relative to stellar spin axis, latter of which is measured through Rossiter-McLaughlin effect during primary transit.

I present the results of an on-going survey aiming to determine such architectures for a sample of ∼10 warm-Jupiters, using ESPRESSO/VLT. Our sample includes only those systems where orbits are long enough (P≥10days) for stellar tidal effects to be ineffective in reprocessing primordial orbital configuration, that pose an observational challenge due to rarity and duration of their transits.

These systems present architectures from aligned and eccentric to mis-aligned and circular, pointing to inadequacy of current formation theories and the need to revise them.

Horarios: April 2, 2024 15:30

Publicado por: Claudia Aguilera