The Chemistry of Cosmic Dust Analogs from C, C-2, and C(2)H(2)in C-rich Circumstellar Envelopes

doi:10.3847/1538-4357/ab9086

KMS > 物质科学与技术学院 > PI研究组 > Osamu Terasaki组

	The Chemistry of Cosmic Dust Analogs from C, C-2, and C(2)H(2)in C-rich Circumstellar Envelopes
	Santoro, Gonzalo 1; Martinez, Lidia 1; Lauwaet, Koen 2; Accolla, Mario 1; Tajuelo-Castilla, Guillermo 1; Merino, Pablo 1,3; Sobrado, Jesus M.4; Pelaez, Ramon J.5; Herrero, Victor J.5; Tanarro, Isabel 5; Mayoral, Alvaro6 ; Agundez, Marcelino 3; Sabbah, Hassan 7; Joblin, Christine 7; Cernicharo, Jose 3; Angel Martin-Gago, Jose 1
	2020-06
发表期刊	ASTROPHYSICAL JOURNAL
ISSN	0004-637X
EISSN	1538-4357
卷号	895 期号:2
发表状态	已发表
DOI	10.3847/1538-4357/ab9086
摘要	Interstellar carbonaceous dust is mainly formed in the innermost regions of circumstellar envelopes around carbon-rich asymptotic giant branch stars (AGBs). In these highly chemically stratified regions, atomic and diatomic carbon, along with acetylene, are the most abundant species after H(2)and CO. In a previous study, we addressed the chemistry of carbon (C and C-2) with H(2)showing that acetylene and aliphatic species form efficiently in the dust formation region of carbon-rich AGBs whereas aromatics do not. Still, acetylene is known to be a key ingredient in the formation of linear polyacetylenic chains, benzene, and polycyclic aromatic hydrocarbons (PAHs), as shown by previous experiments. However, these experiments have not considered the chemistry of carbon (C and C-2) with C2H2. In this work, by employing a sufficient amount of acetylene, we investigate its gas-phase interaction with atomic and diatomic carbon. We show that the chemistry involved produces linear polyacetylenic chains, benzene, and other PAHs, which are observed with high abundances in the early evolutionary phase of planetary nebulae. More importantly, we have found a nonnegligible amount of pure and hydrogenated carbon clusters as well as aromatics with aliphatic substitutions, both being a direct consequence of the addition of atomic carbon. The incorporation of alkyl substituents into aromatics can be rationalized by a mechanism involving hydrogen abstraction followed by methyl addition. All the species detected in the gas phase are incorporated into nanometric-sized dust analogs, which consist of a complex mixture of sp, sp(2), and sp(3)hydrocarbons with amorphous morphology.
关键词	Asymptotic giant branch Post-asymptotic giant branch Circumstellar matter Circumstellar dust Laboratory astrophysics Molecular physics Plasma physics Protoplanetary nebulae
URL	查看原文
收录类别	SCI ; SCIE
语种	英语
资助项目	European Research Council[610256] ; Spanish Research Agency (AEI)[MAT2017-85089-c2-1R][FIS2016-77578-R][FIS2016-77726-C3-1-P][AYA2016-75066-C2-1-P][RyC-2014-16277] ; FotoArt-CM Project[P2018/NMT 4367] ; Comunidad Autonoma de Madrid[PEJD-2018-PRE/IND-9029]
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000541115800001
出版者	IOP PUBLISHING LTD
WOS关键词	POLYCYCLIC AROMATIC-HYDROCARBONS ; DIFFUSE INTERSTELLAR-MEDIUM ; RESOLVED ATOMIC RESONANCE ; NEUTRAL-NEUTRAL REACTIONS ; INFRARED-EMISSION BANDS ; ABSORPTION-SPECTROSCOPY ; REACTION-KINETICS ; MU-M ; CARBON ; C2H2
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/121808
专题	物质科学与技术学院_PI研究组_Osamu Terasaki组
通讯作者	Santoro, Gonzalo
作者单位	1.CSIC, Inst Ciencia Mat Madrid ICMM, Mat Sci Factory, Struct Nanoscop Syst Grp, C Sor Juana Ines de la Cruz 3, E-28049 Madrid, Spain 2.IMDEA Nanociencia, Ciudad Univ Cantoblanco, E-28049 Madrid, Spain 3.CSIC, Inst Fis Fundamental IFF, Grp Mol Astrophys, C Serrano 123, E-28006 Madrid, Spain 4.CSIC, INTA, Ctr Astrobiol CAB, Crta Torrejon Ajalvir Km4, E-28850 Madrid, Spain 5.Inst Estruct Mat IEMCSIC, Mol Phys Dept, C Serrano 123, E-28006 Madrid, Spain 6.ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai 201210, Peoples R China 7.Univ Toulouse, CNRS, CNES, IRAP, 9 Av Colonel Roche, F-31028 Toulouse 4, France
推荐引用方式 GB/T 7714	Santoro, Gonzalo,Martinez, Lidia,Lauwaet, Koen,et al. The Chemistry of Cosmic Dust Analogs from C, C-2, and C(2)H(2)in C-rich Circumstellar Envelopes[J]. ASTROPHYSICAL JOURNAL,2020,895(2).
APA	Santoro, Gonzalo.,Martinez, Lidia.,Lauwaet, Koen.,Accolla, Mario.,Tajuelo-Castilla, Guillermo.,...&Angel Martin-Gago, Jose.(2020).The Chemistry of Cosmic Dust Analogs from C, C-2, and C(2)H(2)in C-rich Circumstellar Envelopes.ASTROPHYSICAL JOURNAL,895(2).
MLA	Santoro, Gonzalo,et al."The Chemistry of Cosmic Dust Analogs from C, C-2, and C(2)H(2)in C-rich Circumstellar Envelopes".ASTROPHYSICAL JOURNAL 895.2(2020).