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Interstellar Comets and the New Insights to Planet Formation They Provide

Presentation #304.04 in the session Comets and ISOs: Dynamics, Origins and Theory.

Published onOct 20, 2022
Interstellar Comets and the New Insights to Planet Formation They Provide

Minor bodies have always held the keys to unraveling the mysteries of planetary systems. Within the solar system, they have opened windows into our understanding of the formation and evolution of the solar system planets. The discoveries of the first two interstellar minor bodies 1I/‘Oumuamua and 2I/Borisov, provide a chance to obtain new constraints on the formation location of planetesimals ejected from extrasolar systems and the occurrence rate and dynamical evolution of exoplanets responsible for their ejection. In this talk, I will discuss the potential that these measurements offer to inform exoplanetary formation and composition in the era of JWST and LSST. I will describe how future measurements of the production rates of H2O, CO2, and CO in interstellar comets can be used to estimate their carbon-to-oxygen ratios, which trace formation locations within their original protoplanetary disks. I will also demonstrate that interstellar comet analogues that form in distant regions of exoplanetary system can provide significant metal enrichment to short period exoplanetary atmospheres, which are potentially observable in upcoming JWST observations.

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