Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA

doi:10.3389/fspas.2023.1215642

	Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA
	Feng, Yanan1,2 ; Li, Xiaohu1,3 ; Millar, Tom J.4; Szczerba, Ryszard 5; Wang, Ke 6; Quan, Donghui1,7 ; Qin, Shengli 1,8; Fang, Xuan 1,9,10,11; Tuo, Juan1,2 ; Miao, Zhenzhen1 ; Ma, Rong1,2 ; Xu, Fengwei 6,12; Sun, Jingfei 1; Jiang, Biwei 13,14; Chang, Qiang15 ; Yang, Jianchao1,2 ; Hou, Gao-Lei 16; Li, Fangfang1 ; Zhang, Yong1,11,17
	2023-08-14
Source Publication	FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
ISSN	2296-987X
Volume	10 Pages:1215642
Contribution Rank	1
Abstract	The fact that whether SiC2 is a parent species, formed in the photosphere or as a by-product of high-temperature dust formation, or a daughter species, formed in chemistry driven by the photodestruction of the parent species in the outer envelope, has been debated for a long time. In this study, we analyze the Atacama Large Millimeter Array (ALMA) observations of four SiC2 transitions in the circumstellar envelopes (CSEs) of three C-rich asymptotic giant branch (AGB) stars (AI Vol, II Lup, and RAFGL 4211) and find that SiC2 exhibits an annular, shell-like distribution in these targets, suggesting that SiC2 can be a daughter species in the CSEs of carbon-rich AGB stars. The results may provide important references for future chemical models.
Keyword	asymptotic giant branch stars mass loss circumstellar envelope C-rich SiC2 AI Vol II Lup RAFGL 4211
DOI	10.3389/fspas.2023.1215642
Indexed By	SCI
Language	英语
WOS Keyword	MOLECULAR LINE SURVEY ; MASS-LOSS RATES ; SILICON CHEMISTRY ; INNER WIND ; ABUNDANCES ; IRC+10216 ; MAPS
Funding Project	XL acknowledges the support from the Xinjiang Tianchi project (2019). TM is grateful to the Leverhulme Trust for the award of an Emeritus Fellowship. This work was also funded by the National Science Foundation of China (12173023), the China Manned Space P[CMS-CSST-2021-A09] ; Leverhulme Trust - National Science Foundation of China[11973013] ; China Manned Space Project[22022YFA1603102] ; National Science Foundation of China[11973075] ; National Key Research and Development Program of China[2023-CX-TD-49] ; National Natural Science Foundation of China ; Innovation Capability Support Program of Shaanxi Province ; Xinjiang Uygur Autonomous Region of China ; [12173023]
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:001055594900001
Publisher	FRONTIERS MEDIA SA
Funding Organization	XL acknowledges the support from the Xinjiang Tianchi project (2019). TM is grateful to the Leverhulme Trust for the award of an Emeritus Fellowship. This work was also funded by the National Science Foundation of China (12173023), the China Manned Space P ; Leverhulme Trust - National Science Foundation of China ; China Manned Space Project ; National Science Foundation of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Innovation Capability Support Program of Shaanxi Province ; Xinjiang Uygur Autonomous Region of China
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/5419
Collection	射电天文研究室_天体化学研究团组
Corresponding Author	Li, Xiaohu
Affiliation	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi, Peoples R China 4.Queens Univ Belfast, Astrophys Res Ctr, Sch Math & Phys, Belfast, North Ireland 5.Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland 6.Astrophys Peking Univ KIAA PKU, Kavli Inst Astron, Beijing, Peoples R China 7.Res Ctr Intelligent Comp Platforms, Zhejiang Lab, Hangzhou, Peoples R China 8.Yunnan Univ, Dept Astron, Kunming, Peoples R China 9.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 10.Univ Hong Kong, Fac Sci, Dept Phys, Hangzhou, Peoples R China 11.Univ Hong Kong, Fac Sci, Lab Space Res, Hangzhou, Peoples R China 12.Peking Univ DoA PKU, Dept Astron, Beijing, Peoples R China 13.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing, Peoples R China 14.Beijing Normal Univ, Dept Astron, Beijing, Peoples R China 15.Shandong Univ Technol, Sch Phys & Optoelect Engn, Zibo, Peoples R China 16.Xi An Jiao Tong Univ, Sch Phys, MOE Key Lab Nonequilibrium Synth & Modulat Condens, Xian, Peoples R China 17.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou, Peoples R China
First Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Feng, Yanan,Li, Xiaohu,Millar, Tom J.,et al. Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA[J]. FRONTIERS IN ASTRONOMY AND SPACE SCIENCES,2023,10:1215642.
APA	Feng, Yanan.,Li, Xiaohu.,Millar, Tom J..,Szczerba, Ryszard.,Wang, Ke.,...&Zhang, Yong.(2023).Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA.FRONTIERS IN ASTRONOMY AND SPACE SCIENCES,10,1215642.
MLA	Feng, Yanan,et al."Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA".FRONTIERS IN ASTRONOMY AND SPACE SCIENCES 10(2023):1215642.

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