A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)

Juan Tuo; Xiaohu Li; Jixian Sun; Tom J. Millar; Yong Zhang; Jianjie Qiu; Donghui Quan; Jarken Esimbek; Jianjun Zhou; Yu Gao; Qiang Chang; Lin Xiao; Yanan Feng; Zhenzhen Miao; Rong Ma; Ryszard Szczerba; Xuan Fang

doi:10.3847/1538-4365/ad2460

A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)

Juan Tuo, Xiaohu Li^*, Jixian Sun, Tom J. Millar, Yong Zhang, Jianjie Qiu, Donghui Quan, Jarken Esimbek, Jianjun Zhou, Yu Gao, Qiang Chang, Lin Xiao, Yanan Feng, Zhenzhen Miao, Rong Ma, Ryszard Szczerba, Xuan Fang

^*Corresponding author for this work

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Abstract

We present an unbiased λ 3 mm spectral line survey (between 84.5 and 115.8 GHz), conducted by the Purple Mountain Observatory 13.7 meter radio telescope, together with updated modeling results, towards the carbon-rich Asymptotic Giant Branch star, IRC +10216 (CW Leo). A total of 75 spectral lines (96 transitions) are detected, and identified to arise from 19 molecules: C2H, l-C3H, C4H, CN, C3N, HC3N, HC5N, HCN, HNC, CH3CN, MgNC, CO, c-C3H2, SiC2, SiO, SiS, CS, C2S, C3S, and their isotopologues. Among them, one molecular emission line (H13CCCN J = 13−12) is discovered in IRC +10216 for the first time. The excitation temperature, column density, and fractional abundance of the detected species are deduced by assuming they are in local thermodynamic equilibrium. In addition, the isotopic ratios of [12C]/[13C], [32S]/[34S], [28Si]/[29Si], and [12C34S]/[13C32S] are obtained and found to be consistent with previous studies. Finally, we summarize all of the 106 species detected in IRC +10216 to date with their observed and modeled column densities for the convenience of future studies.

Original language	English
Article number	45
Number of pages	57
Journal	Astrophysical Journal Supplement
Volume	271
Issue number	2
Early online date	26 Mar 2024
DOIs	https://doi.org/10.3847/1538-4365/ad2460
Publication status	Published - Apr 2024

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A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)
Copyright 2024 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 4.06 MBLicence: CC BY

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Tuo, J., Li, X., Sun, J., Millar, T. J., Zhang, Y., Qiu, J., Quan, D., Esimbek, J., Zhou, J., Gao, Y., Chang, Q., Xiao, L., Feng, Y., Miao, Z., Ma, R., Szczerba, R., & Fang, X. (2024). A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo). Astrophysical Journal Supplement, 271(2), Article 45. https://doi.org/10.3847/1538-4365/ad2460

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title = "A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)",

abstract = "We present an unbiased λ 3 mm spectral line survey (between 84.5 and 115.8 GHz), conducted by the Purple Mountain Observatory 13.7 meter radio telescope, together with updated modeling results, towards the carbon-rich Asymptotic Giant Branch star, IRC +10216 (CW Leo). A total of 75 spectral lines (96 transitions) are detected, and identified to arise from 19 molecules: C2H, l-C3H, C4H, CN, C3N, HC3N, HC5N, HCN, HNC, CH3CN, MgNC, CO, c-C3H2, SiC2, SiO, SiS, CS, C2S, C3S, and their isotopologues. Among them, one molecular emission line (H13CCCN J = 13−12) is discovered in IRC +10216 for the first time. The excitation temperature, column density, and fractional abundance of the detected species are deduced by assuming they are in local thermodynamic equilibrium. In addition, the isotopic ratios of [12C]/[13C], [32S]/[34S], [28Si]/[29Si], and [12C34S]/[13C32S] are obtained and found to be consistent with previous studies. Finally, we summarize all of the 106 species detected in IRC +10216 to date with their observed and modeled column densities for the convenience of future studies.",

author = "Juan Tuo and Xiaohu Li and Jixian Sun and Millar, {Tom J.} and Yong Zhang and Jianjie Qiu and Donghui Quan and Jarken Esimbek and Jianjun Zhou and Yu Gao and Qiang Chang and Lin Xiao and Yanan Feng and Zhenzhen Miao and Rong Ma and Ryszard Szczerba and Xuan Fang",

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T1 - A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)

AU - Tuo, Juan

AU - Li, Xiaohu

AU - Sun, Jixian

AU - Millar, Tom J.

AU - Zhang, Yong

AU - Qiu, Jianjie

AU - Quan, Donghui

AU - Esimbek, Jarken

AU - Zhou, Jianjun

AU - Gao, Yu

AU - Chang, Qiang

AU - Xiao, Lin

AU - Feng, Yanan

AU - Miao, Zhenzhen

AU - Ma, Rong

AU - Szczerba, Ryszard

AU - Fang, Xuan

PY - 2024/4

Y1 - 2024/4

N2 - We present an unbiased λ 3 mm spectral line survey (between 84.5 and 115.8 GHz), conducted by the Purple Mountain Observatory 13.7 meter radio telescope, together with updated modeling results, towards the carbon-rich Asymptotic Giant Branch star, IRC +10216 (CW Leo). A total of 75 spectral lines (96 transitions) are detected, and identified to arise from 19 molecules: C2H, l-C3H, C4H, CN, C3N, HC3N, HC5N, HCN, HNC, CH3CN, MgNC, CO, c-C3H2, SiC2, SiO, SiS, CS, C2S, C3S, and their isotopologues. Among them, one molecular emission line (H13CCCN J = 13−12) is discovered in IRC +10216 for the first time. The excitation temperature, column density, and fractional abundance of the detected species are deduced by assuming they are in local thermodynamic equilibrium. In addition, the isotopic ratios of [12C]/[13C], [32S]/[34S], [28Si]/[29Si], and [12C34S]/[13C32S] are obtained and found to be consistent with previous studies. Finally, we summarize all of the 106 species detected in IRC +10216 to date with their observed and modeled column densities for the convenience of future studies.

AB - We present an unbiased λ 3 mm spectral line survey (between 84.5 and 115.8 GHz), conducted by the Purple Mountain Observatory 13.7 meter radio telescope, together with updated modeling results, towards the carbon-rich Asymptotic Giant Branch star, IRC +10216 (CW Leo). A total of 75 spectral lines (96 transitions) are detected, and identified to arise from 19 molecules: C2H, l-C3H, C4H, CN, C3N, HC3N, HC5N, HCN, HNC, CH3CN, MgNC, CO, c-C3H2, SiC2, SiO, SiS, CS, C2S, C3S, and their isotopologues. Among them, one molecular emission line (H13CCCN J = 13−12) is discovered in IRC +10216 for the first time. The excitation temperature, column density, and fractional abundance of the detected species are deduced by assuming they are in local thermodynamic equilibrium. In addition, the isotopic ratios of [12C]/[13C], [32S]/[34S], [28Si]/[29Si], and [12C34S]/[13C32S] are obtained and found to be consistent with previous studies. Finally, we summarize all of the 106 species detected in IRC +10216 to date with their observed and modeled column densities for the convenience of future studies.

U2 - 10.3847/1538-4365/ad2460

DO - 10.3847/1538-4365/ad2460

M3 - Article

SN - 0067-0049

VL - 271

JO - Astrophysical Journal Supplement

JF - Astrophysical Journal Supplement

IS - 2

M1 - 45

ER -

A λ3mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)

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