Nascent planetary compositions are set by the inventories and distributions of molecules in protoplanetary disks. Understanding how planets are seeded with volatile elements (C, N, O), the building blocks for organic/prebiotic chemistry, is key to assessing the habitability of other worlds. We are using ALMA observations of the C, N, and O carriers C<sub>2</sub>H, HCN, and C<sup>18</sup>O to explore how the chemistries of these volatile elements are related to each other and to disk physical properties. Additionally, with evidence mounting that planet formation is already underway in young embedded disks, it is crucial to constrain how the volatile chemistry evolves throughout the disk lifetime. Our sample of 19 disks spans embedded protostellar disks (&lt;0.2 Myr) to evolved protoplanetary disks (&gt;5 Myr), offering insight into time-dependent chemical effects like volatile depletion and isotopic fractionation. Understanding these phenomena will ultimately lead to improved predictions for the volatile compositions of planets that form at different times and locations in the disk.

Volatile chemistry during protoplanetary disk evolution

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.