ACS Earth and Space Chemistry最新文献

{"title":"","authors":"Yun Yang, Chelsea W. Neil*, Eric J Guiltinan, Shaowen Mao, Mohamed Mehana, Qinjun Kang, Shimin Liu, Timothy C. Germann and Michael R. Gross, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.5c00092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Amritpal Singh Chaddha*, Sunil Kumar Shukla*, Anupam Sharma*, Kamlesh Kumar, M.G. Thakkar, Devendra Kumar Patel and G.N.V. Satyanarayana, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.5c00127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Elizabeth Asher, Rebecca S. Hornbrook, Behrooz Roozitalab, Xuan Zhang, John Ortega, Geoffrey S. Tyndall, Alan J. Hills, John J. Orlando and Eric C. Apel*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.4c00407","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/spv009i007_1960352","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Yongxin Song, Chanfang Liu, Xiao-Bing Li*, Bin Yuan*, Sihang Wang, Suxia Yang, Yuwen Peng, Ming Chang, Xuemei Wang and Min Shao, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.5c00082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Hunarpreet Kaur, Weiqi Wang, Jesús Pérez-Ríos, Bruno Martínez-Haya, Britta Redlich and Sandra Brünken*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.4c00395","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"JWST Observations of Segregated 12CO2 and 13CO2 Ices in Protostellar Envelopes","authors":"N. G. C. Brunken*,&nbsp;A. C. A. Boogert,&nbsp;E. F. van Dishoeck,&nbsp;N. J. Evans,&nbsp;C. A. Poteet,&nbsp;K. Slavicinska,&nbsp;L. Tychoniec,&nbsp;P. Nazari,&nbsp;L. W. Looney,&nbsp;H. Tyagi,&nbsp;M. Narang,&nbsp;P. Klaassen,&nbsp;Y. Yang,&nbsp;P. J. Kavanagh,&nbsp;S. T. Megeath and M. E. Ressler,&nbsp;","doi":"10.1021/acsearthspacechem.5c00037","DOIUrl":"https://doi.org/10.1021/acsearthspacechem.5c00037","url":null,"abstract":"<p >The evolution of interstellar ices can be studied with thermal tracers such as the vibrational modes of CO₂ ice that show great diversity depending on their local chemical and thermal environment. Now with the wide spectral coverage and sensitivity of the James Webb Space Telescope we can obtain observations of the weak and strong CO₂ absorption features inhabiting the near- and mid-infrared spectral region. In this work we present observations of the 15.2 μm bending mode, the 4.39 μm stretching mode and the 2.70 μm combination mode of ¹²CO₂ and ¹³CO₂ ice in the high-mass protostar IRAS 20126 and the low-mass protostar Per-emb 35, two sources that show clear signs of ice heating. The 15.2 μm bending mode of both protostars shows the characteristic double peak profile that is associated with pure CO₂ ice and a sharp short-wavelength peak is observed at 4.38 μm in the ¹³CO₂ bands of the two sources. Furthermore, a narrow short-wavelength feature is detected at 2.69 μm in the ¹²CO₂ combination mode of Per-emb 35. We perform a consistent profile decomposition on all three vibrational modes and show that the profiles of all three bands can be reproduced with the same linear combination of CO₂ ice in mixtures with mostly CH₃OH and H₂O ices when the ices undergo segregation due to heating. The findings show that upon heating, CO₂ ice is likely segregating from mostly the water-rich ice layer and the CO₂–CH₃OH component becomes dominant in all three vibrational modes. Additionally, we find that the contribution of the different CO₂ components with respect to the total absorption band is similar for both ¹²CO₂ and ¹³CO₂. This indicates that fractionation processes must not play a significant role during the different formation epochs, H₂O-dominated and CO-dominated, of the CO₂ ices and that the ratio persists through the heating stage. We quantify the ¹²CO₂ and ¹³CO₂ ice column densities and derive ¹²C/¹³C_<i>ice</i> = 90 ± 9 in IRAS 20126, a value that is lower compared to what was previously reported for warm gaseous CO in this source. Finally, we report the detection of the ¹³CO₂ bending mode of pure CO₂ ice at 15.64 μm in both IRAS 20126 and Per-emb 35.</p>","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 8","pages":"1992–2003"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.5c00037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Bhagawati Kunwar,&nbsp;Ambarish Pokhrel,&nbsp;Takeji Niwai and Kimitaka Kawamura*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.4c00385","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Raksha Umesh,&nbsp; and ,&nbsp;Nanishankar V. Harohally*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.5c00095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"René Groß*,&nbsp;Christoph Wetzel,&nbsp;Lei Zheng,&nbsp;Christoph Kahra,&nbsp;Justus Pawlak,&nbsp;Kevin Tran,&nbsp;Maximilian Seydi Kilic,&nbsp;Harald Gaber,&nbsp;Bernhard Roth and Franz Renz,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":15,"journal":{"name":"ACS Earth and Space Chemistry","volume":"9 7","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":2.9,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.5c00117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}