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