Electron impacts on pure carbon monoxide ices

Astrophy. J., 889, 57 (2020)

C.-H. Huang, A. Ciaravella, C. Cecchi-Pestellini, A. Jiménez-Escobar, L.-C. Hsiao, C.-C. Huang, P.-C. Chen, N.-E. Sie, and Y.-J. Chen

Effects of 150–1000 eV Electron Impacts on Pure Carbon Monoxide Ices Using the Interstellar Energetic-Process System (IEPS)


Laboratory simulation shows that amount of long-chain carbons and suboxides are formed in CO ice irradiated by electrons. This result can simulate Triton and Pluto’ s atmosphere including volatile species such as nitrogen, methane, and carbon monoxide condensation during the winter. These ice cap irradiated by solar wind or/and primary electron produced by cosmic ray at polar can drive chemical evolution in the ice. Long-chain carbons and suboxides are introduced into nitrogen-rich atmosphere during summer, and form carbon and nitrogen compound increasing the complicity in the atmosphere through photochemical reactions.