Publicly Offered Research
Grant-in-Aid for Transformative Research Areas (A)
Complex organic molecules (COM) have been detected in the interstellar medium (ISM). However, their origin is unknown. The fundamental building blocks of the COMs may be formed on cosmic icy dust grains in the ISM at low temperatures (e.g., 10 K), where small radical species play a crucial role. However, quantitative mechanistic details of radical adsorption, diffusion, and chemical reactions are not fully established and treated as a “black box” in the astrochemical models. Therefore, quantum chemical determination of the radical processes on icy grains become critical.
The origin of the complex organic molecules (COMs) in the interstellar medium (ISM) is not well established. Radicals formed on interstellar dust grains play a vital role in the formation of COMs. However, behavior radicals and ions on ice dust grains are not fully rationalized. To overcome this limitation, we use quantum chemistry to study the behavior of radicals on interstellar ice.We have explored the radical reactions on ices; CH3SH + H and CH3OH + OH. Computed reaction paths of the radical reactions on ice explained the experimentally observed products, where quantum tunneling plays a key role in achieving the reactions at low temperatures. Present studies give important mechanistic insights into the COMs formation in the ISM.
令和4年度が最終年度であるため、記入しない。
All 2023 2022 2021 Other
All Journal Article (4 results) (of which Int'l Joint Research: 3 results, Peer Reviewed: 4 results, Open Access: 4 results) Presentation (11 results) (of which Int'l Joint Research: 11 results, Invited: 2 results) Book (2 results) Remarks (1 results)
Faraday Discuss.
Volume: - Pages: 508-518
10.1039/d3fd00033h
The Astrophysical Journal
Volume: 944 Issue: 2 Pages: 219-219
10.3847/1538-4357/acafde
Front. Astron. Space Sci.
Volume: 9 Pages: 1-7
10.3389/fspas.2022.890161
Volume: 922 Issue: 2 Pages: 146-146
10.3847/1538-4357/ac2238
http://www.lowtem.hokudai.ac.jp/astro/index.html
