Planet Engulfment Detections are Rare According to Observations and Stellar Modeling

Sept. 30, 2022, noon - 1 p.m.

Presented By:
Aida Behmard
CalTech &

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Models of dynamical evolution within planetary systems show that numerous planets should be engulfed by their host stars, leading to elemental pollution of the stellar atmospheres. We conducted a Keck-HIRES survey of 36 multi-star systems but found only one where abundance patterns suggest engulfment. I will discuss the data and an explanation for the rarity of engulfment signatures among these systems.