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HCN (1-0) opacity of outflowing gas in Arp 220W
Wang, J. Z.1,2; Liu, S.3,4; Zhang, Z-Y5,6; Shi, Y.5,6
2021-05-26
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume649Pages:5
AbstractContext. We present our findings for the HCN/(HCN)-C-13 1-0 line ratio in the molecular outflow of Arp 220 west based on high-resolution ALMA data.Aims. Molecular gas masses in the outflowing gas of galaxies driven by active galactic nuclei or starbursts are important parameters for understanding the feedback of these latter two phenomena and star-formation quenching. The conversion factor of line luminosities to masses is related to the optical depth of the molecular lines.Methods. Using (HCN)-C-13 1-0, the isotopic line of HCN 1-0, to obtain the line ratio of HCN/(HCN)-C-13 1-0 is an ideal way to derive the optical depth of HCN 1-0 in outflowing gas.Results. With the nondetection of (HCN)-C-13 1-0 in the outflowing gas, a 3 sigma lower limit of HCN/(HCN)-C-13 1-0 line ratio is obtained, which is at least three times higher than that found in the whole of the whole system of Arp 220. The high HCN/(HCN)-C-13 1-0 line ratio indicates low opacity of HCN 1-0 in the outflowing gas, even though the upper limit of HCN 1-0 opacity obtained here is still not good enough to draw any robust conclusions if HCN 1-0 is optically thin. A lower conversion factor of HCN 1-0 luminosity to dense gas mass in the outflowing gas should be used than that used for the host galaxy of Arp 220.
Keywordopacity galaxies: individual: Arp 220 methods: data analysis
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1051/0004-6361/202140433
WOS KeywordMASSIVE MOLECULAR OUTFLOWS ; DENSE-GAS ; FEEDBACK ; HCO+ ; KINEMATICS
Language英语
Funding ProjectNational Natural Science Foundation of China[11988101] ; National Natural Science Foundation of China[11590783] ; National Natural Science Foundation of China[U1731237]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000658516000003
PublisherEDP SCIENCES S A
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77476
Collection中国科学院国家天文台
Corresponding AuthorWang, J. Z.
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100012, Peoples R China
5.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
6.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Peoples R China
Recommended Citation
GB/T 7714
Wang, J. Z.,Liu, S.,Zhang, Z-Y,et al. HCN (1-0) opacity of outflowing gas in Arp 220W[J]. ASTRONOMY & ASTROPHYSICS,2021,649:5.
APA Wang, J. Z.,Liu, S.,Zhang, Z-Y,&Shi, Y..(2021).HCN (1-0) opacity of outflowing gas in Arp 220W.ASTRONOMY & ASTROPHYSICS,649,5.
MLA Wang, J. Z.,et al."HCN (1-0) opacity of outflowing gas in Arp 220W".ASTRONOMY & ASTROPHYSICS 649(2021):5.
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