View in EDS

Swift heavy‐ion‐driven chemistry in CO:CO2 astrophysical ice analogs: Part I – experimental data.

Saved in:
Bibliographic Details
Title: Swift heavy‐ion‐driven chemistry in CO:CO2 astrophysical ice analogs: Part I – experimental data.
Authors: Pilling, S.1 (AUTHOR) sergiopilling@yahoo.com.br, Moraes, L.1 (AUTHOR), Fargnoli, C.M.L.1 (AUTHOR), Ojeda-González, A.1 (AUTHOR), Rocha, W.R.M.2 (AUTHOR), Domaracka, A.3 (AUTHOR), Boduch, P.3 (AUTHOR), Rothard, H.3 (AUTHOR)
Source: Advances in Space Research. May2026, Vol. 77 Issue 10, p10841-10858. 18p.
Subjects: Fast ions, Fourier transform infrared spectroscopy, Desorption, Chemical properties, Interstellar molecules, Cosmic rays
Abstract: This work presents the first paper in a series investigating the chemical evolution of mixed CO:CO 2 ices under irradiation by 95.2 MeV 136Xe23+ ions, simulating the effects of swift heavy cosmic rays on astrophysical ice analogs. We report in situ FTIR measurements of seven ice compositions, from pure CO to pure CO 2 , irradiated at 10 K at the GANIL facility. The CO/CO 2 ratios converge toward values observed in comets and protostellar disks, indicating a bombardment-driven steady state. Our results further suggest that the primordial CO/CO 2 ratio of the interstellar comet 3I/ATLAS lies in the range 0.25–0.17. We identify intermediate species (e.g., C 2 O, CO 3 , C 3 O 2) as astrochemically relevant products and propose them as targets for ALMA and JWST. Overall, our results indicate that initial ice stoichiometry governs molecular complexity and influences volatile release in cold cosmic environments. Forthcoming papers will address detailed chemical modeling. [ABSTRACT FROM AUTHOR]
Copyright of Advances in Space Research is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:This work presents the first paper in a series investigating the chemical evolution of mixed CO:CO 2 ices under irradiation by 95.2 MeV 136Xe23+ ions, simulating the effects of swift heavy cosmic rays on astrophysical ice analogs. We report in situ FTIR measurements of seven ice compositions, from pure CO to pure CO 2 , irradiated at 10 K at the GANIL facility. The CO/CO 2 ratios converge toward values observed in comets and protostellar disks, indicating a bombardment-driven steady state. Our results further suggest that the primordial CO/CO 2 ratio of the interstellar comet 3I/ATLAS lies in the range 0.25–0.17. We identify intermediate species (e.g., C 2 O, CO 3 , C 3 O 2) as astrochemically relevant products and propose them as targets for ALMA and JWST. Overall, our results indicate that initial ice stoichiometry governs molecular complexity and influences volatile release in cold cosmic environments. Forthcoming papers will address detailed chemical modeling. [ABSTRACT FROM AUTHOR]
ISSN:02731177
DOI:10.1016/j.asr.2026.02.056