globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2005225117
论文题名:
X-ray processing of a realistic ice mantle can explain the gas abundances in protoplanetary disks
作者: Ciaravella A.; Muñoz Caro G.M.; Jiménez-Escobar A.; Cecchi-Pestellini C.; Hsiao L.-C.; Huang C.-H.; Chen Y.-J.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:28
起始页码: 16149
结束页码: 16153
语种: 英语
英文关键词: Astrochemistry ; Methods: laboratory: molecular ; Protoplanetary disks ; X-rays
Scopus关键词: bicarbonate ; carbon monoxide ; formaldehyde ; ice ; methanol ; Article ; astronomy ; desorption ; dust ; gas evolution ; priority journal ; radiation dose ; temperature ; ultraviolet radiation ; X irradiation ; article ; astronomy ; cold stress ; irradiation ; sun ; X ray
英文摘要: The Atacama Large Millimeter Array has allowed a detailed observation of molecules in protoplanetary disks, which can evolve toward solar systems like our own. While CO, CO2, HCO, and H2CO are often abundant species in the cold zones of the disk, CH3OH or CH3CN are only found in a few regions, and more-complex organic molecules are not observed. We simulate, experimentally, ice processing in disks under realistic conditions, that is, layered ices irradiated by soft X-rays. X-ray emission from young solar-type stars is thousands of times brighter than that of today’s sun. The ice mantle is composed of a H2O:CH4:NH3 mixture, covered by a layer made of CH3OH and CO. The photoproducts found desorbing from both ice layers to the gas phase during the irradiation converge with those detected in higher abundances in the gas phase of protoplanetary disks, providing important insights on the nonthermal processes that drive the chemistry in these objects. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163437
Appears in Collections:气候变化与战略

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作者单位: Ciaravella, A., Osservatorio Astronomico di Palermo, Istituto Nazionale di Astrofisica, Palermo, 90134, Italy; Muñoz Caro, G.M., Centro de Astrobiología, Consejo Superior de Investigaciones Científicas, Instituto Nacional de Técnica Aeroespacial, Torrejón de Ardoz, Madrid, 28850, Spain; Jiménez-Escobar, A., Osservatorio Astronomico di Palermo, Istituto Nazionale di Astrofisica, Palermo, 90134, Italy; Cecchi-Pestellini, C., Osservatorio Astronomico di Palermo, Istituto Nazionale di Astrofisica, Palermo, 90134, Italy; Hsiao, L.-C., Department of Physics, National Central University, Jhongli, 32054, Taiwan; Huang, C.-H., Department of Physics, National Central University, Jhongli, 32054, Taiwan; Chen, Y.-J., Department of Physics, National Central University, Jhongli, 32054, Taiwan

Recommended Citation:
Ciaravella A.,Muñoz Caro G.M.,Jiménez-Escobar A.,et al. X-ray processing of a realistic ice mantle can explain the gas abundances in protoplanetary disks[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(28)
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