Formation of Complex Organic Molecules in Prestellar Cores: The Role of Nondiffusive Grain Chemistry
文献类型：期刊论文
| 作者 | Borshcheva, Katerina3,6; Fedoseev, Gleb1,3,7; Punanova, Anna F.2; Caselli, Paola5; Jimenez-Serra, Izaskun4; Vasyunin, Anton I.3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-09-10 |
| 卷号 | 990期号:2页码:163 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/adea73 |
| 产权排序 | 3 |
| 英文摘要 | We present the results of astrochemical modeling of complex organic molecules (COMs) in the ice and gas of the prestellar core L1544 with the recently updated MONACO rate equation-based model. The model includes, in particular, nondiffusive processes, new laboratory verified chemical routes for acetaldehyde and methane ice formation, and variations of H and H2 desorption energies depending on the surface coverage by H2 molecules. For the first time, we simultaneously reproduce the abundances of several oxygen-bearing COMs in the gas-phase, the approximate location of the peak of methanol emission, as well as the abundance of methanol in the icy mantles of L1544. Radical-radical reactions on the grain surface between species such as CH3, CH3O, and HCO efficiently proceed nondiffusively. COMs are delivered to the gas-phase via chemical desorption amplified by the loops of H-addition/abstraction surface reactions. However, gas-phase chemical reactions as well provide a noticeable input to the formation of COMs in the gas, but not to the COMs solid-state abundances. This particularly applies for CH3CHO and CH3OCH3. The simulated abundances of COMs in the ice are in the range 1%-2% (for methyl formate ice) or similar to 0.1% (for CH3CHO and CH3OCH3) with respect to the abundance of H2O ice. We stress a similarity between the simulated abundances of icy COMs in L1544 and the abundances of COMs in the gas-phase of hot cores/corinos. We compare our nondiffusive model with the diffusive model and provide constraints for the species' diffusion-to-desorption energy ratios. |
| WOS关键词 | INTERSTELLAR ICE ANALOGS ; GAS-PHASE FORMATION ; PRE-STELLAR CORES ; CENTRAL 1000 AU ; CHEMICAL DESORPTION ; HYDROGEN-ATOM ; NONTHERMAL DESORPTION ; STICKING COEFFICIENTS ; RADIATIVE ASSOCIATION ; REACTIVE DESORPTION |
| 资助项目 | Russian Science Foundation (RSF)https://doi.org/10.13039/501100006769[23-12-00315] ; Russian Science Foundation[FEUZ-2025-0003] ; Russian Science Foundation[2024] ; Russian Science Foundation[PID2022-136814NB-I00] ; Russian Ministry of Science and Higher Education[MICIU/AEI/10.13039/501100011033] ; Spanish Ministry of Science, Innovation and Universities/State Agency of Research ; ERDF/EU[101125858] ; ERC grant OPENS ; European Union |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001564101000001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Russian Science Foundation (RSF)https://doi.org/10.13039/501100006769 ; Russian Science Foundation ; Russian Ministry of Science and Higher Education ; Spanish Ministry of Science, Innovation and Universities/State Agency of Research ; ERDF/EU ; ERC grant OPENS ; European Union |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8101]  |
| 专题 | 天体化学研究团组 |
| 通讯作者 | Borshcheva, Katerina |
| 作者单位 | 1.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 2.Chalmers Univ Technol, Onsala Space Observ, Observ Vagen 90, S-43992 Onsala, Sweden 3.Ural Fed Univ, Res Lab Astrochem, Mira St 19, Ekaterinburg, Russia 4.Ctr Astrobiol CSIC INTA, Torrejon De Ardoz Madrid, Spain 5.Max Planck Inst Extraterr Phys, Giesenbachstr 1, D-86748 Garching, Germany 6.Russian Acad Sci, Inst Astron, Pyatnitskaya Str 48, Moscow, Russia 7.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Borshcheva, Katerina,Fedoseev, Gleb,Punanova, Anna F.,et al. Formation of Complex Organic Molecules in Prestellar Cores: The Role of Nondiffusive Grain Chemistry[J]. ASTROPHYSICAL JOURNAL,2025,990(2):163. |
| APA | Borshcheva, Katerina,Fedoseev, Gleb,Punanova, Anna F.,Caselli, Paola,Jimenez-Serra, Izaskun,&Vasyunin, Anton I..(2025).Formation of Complex Organic Molecules in Prestellar Cores: The Role of Nondiffusive Grain Chemistry.ASTROPHYSICAL JOURNAL,990(2),163. |
| MLA | Borshcheva, Katerina,et al."Formation of Complex Organic Molecules in Prestellar Cores: The Role of Nondiffusive Grain Chemistry".ASTROPHYSICAL JOURNAL 990.2(2025):163. |
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