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

Yanan Feng; Xiaohu Li; Tom J. Millar; Ryszard Szczerba; Ke Wang; Donghui Quan; Shengli Qin; Xuan Fang; Juan Tuo; Zhenzhen Miao; Rong Ma; Fengwei Xu; Jingfei Sun; Biwei Jiang; Qiang Chang; Jianchao Yang; Gao Lei Hou; Fangfang Li; Yong Zhang

doi:10.3389/fspas.2023.1215642

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

Yanan Feng
, Xiaohu Li^*
, Tom J. Millar
, Ryszard Szczerba
, Ke Wang
, Donghui Quan
, Shengli Qin
, Xuan Fang
, Juan Tuo
, Zhenzhen Miao
, Rong Ma
, Fengwei Xu
, Jingfei Sun
, Biwei Jiang
, Qiang Chang
, Jianchao Yang
, Gao Lei Hou
, Fangfang Li
, Yong Zhang

^*Corresponding author for this work

CAS - National Astronomical Observatories
University of Chinese Academy of Sciences
Chinese Academy of Sciences
Queen's University Belfast
Polish Academy of Sciences
Peking University
Research Center for Intelligent Computing Platforms
Zhejiang Lab
Yunnan University
The University of Hong Kong
Beijing Normal University
Shandong University of Technology
Xi'an Jiaotong University
Sun Yat-Sen University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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.

Original language	English
Article number	1215642
Journal	Frontiers in Astronomy and Space Sciences
Volume	10
DOIs	https://doi.org/10.3389/fspas.2023.1215642
Publication status	Published - 2023
Externally published	Yes

Keywords

AI Vol
asymptotic giant branch stars
C-rich
circumstellar envelope
II Lup
mass loss
RAFGL 4211
SiC

Access to Document

10.3389/fspas.2023.1215642

Cite this

Feng, Y., Li, X., Millar, T. J., Szczerba, R., Wang, K., Quan, D., Qin, S., Fang, X., Tuo, J., Miao, Z., Ma, R., Xu, F., Sun, J., Jiang, B., Chang, Q., Yang, J., Hou, G. L., Li, F., & Zhang, Y. (2023). Photochemical origin of SiC₂ in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA. Frontiers in Astronomy and Space Sciences, 10, Article 1215642. https://doi.org/10.3389/fspas.2023.1215642

@article{7334ecf9ea674cf3a6d6667c5ab527e5,

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

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.",

keywords = "AI Vol, asymptotic giant branch stars, C-rich, circumstellar envelope, II Lup, mass loss, RAFGL 4211, SiC",

author = "Yanan Feng and Xiaohu Li and Millar, \{Tom J.\} and Ryszard Szczerba and Ke Wang and Donghui Quan and Shengli Qin and Xuan Fang and Juan Tuo and Zhenzhen Miao and Rong Ma and Fengwei Xu and Jingfei Sun and Biwei Jiang and Qiang Chang and Jianchao Yang and Hou, \{Gao Lei\} and Fangfang Li and Yong Zhang",

note = "Publisher Copyright: Copyright {\textcopyright} 2023 Feng, Li, Millar, Szczerba, Wang, Quan, Qin, Fang, Tuo, Miao, Ma, Xu, Sun, Jiang, Chang, Yang, Hou, Li and Zhang.",

year = "2023",

doi = "10.3389/fspas.2023.1215642",

language = "English",

volume = "10",

journal = "Frontiers in Astronomy and Space Sciences",

issn = "2296-987X",

}

Feng, Y, Li, X, Millar, TJ, Szczerba, R, Wang, K, Quan, D, Qin, S, Fang, X, Tuo, J, Miao, Z, Ma, R, Xu, F, Sun, J, Jiang, B, Chang, Q, Yang, J, Hou, GL, Li, F & Zhang, Y 2023, 'Photochemical origin of SiC₂ in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA', Frontiers in Astronomy and Space Sciences, vol. 10, 1215642. https://doi.org/10.3389/fspas.2023.1215642

TY - JOUR

T1 - Photochemical origin of SiC2 in the circumstellar envelope of carbon-rich AGB stars revealed by ALMA

AU - Feng, Yanan

AU - Li, Xiaohu

AU - Millar, Tom J.

AU - Szczerba, Ryszard

AU - Wang, Ke

AU - Quan, Donghui

AU - Qin, Shengli

AU - Fang, Xuan

AU - Tuo, Juan

AU - Miao, Zhenzhen

AU - Ma, Rong

AU - Xu, Fengwei

AU - Sun, Jingfei

AU - Jiang, Biwei

AU - Chang, Qiang

AU - Yang, Jianchao

AU - Hou, Gao Lei

AU - Li, Fangfang

AU - Zhang, Yong

PY - 2023

Y1 - 2023

N2 - 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.

AB - 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.

KW - AI Vol

KW - asymptotic giant branch stars

KW - C-rich

KW - circumstellar envelope

KW - II Lup

KW - mass loss

KW - RAFGL 4211

KW - SiC

UR - https://www.scopus.com/pages/publications/85169337309

U2 - 10.3389/fspas.2023.1215642

DO - 10.3389/fspas.2023.1215642

M3 - Article

AN - SCOPUS:85169337309

SN - 2296-987X

VL - 10

JO - Frontiers in Astronomy and Space Sciences

JF - Frontiers in Astronomy and Space Sciences

M1 - 1215642