PMO OpenIR
Resolved Neutral Carbon Emission in Nearby Galaxies: [C I] Lines as Total Molecular Gas Tracers
Jiao, Qian1,2; Zhao, Yinghe3,4,5; Lu, Nanyao6,7,8; Gao, Yu1,2; Salak, Dragan9; Zhu, Ming7,8; Zhang, Zhi-Yu10,11; Jiang, Xue-Jian1,2; Tan, Qinghua1,2
2019-08-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume880Issue:2Pages:11
Corresponding AuthorJiao, Qian(jiaoqian@pino.ac.cn)
AbstractWe present maps of atomic carbon [C I](P-3(1) -> P-3(0)) and [C I](P-3(2) -> P-3(1)) emission (hereafter [C I] (1-0) and [C I] (2-1), respectively) at a linear resolution similar to 1 kpc scale for a sample of one H II, six LINER, three Seyfert, and five starburst galaxies observed with the Herschel Space Observatory. We compare spatial distributions of two [C I] lines with that of CO J = 1 -> 0 (hereafter CO (1-0)) emission, and find that both [C I] lines distribute similarly to CO (1-0) emission in most galaxies. We present luminosity ratio maps of L[C I](1-0)'/LCO(1-0)', L[C I](2-1)'/LCO(1-0)', L[C I](2-1)'/L[C I](1-0)' (hereafter R-[C I] and 70-to-160 mu m far-infrared color of f(70)/f(160). L[C I](2-1)'/LCO(1-0)', R-[C I] and f(70)/f(160) are centrally peaked in starbursts; whereas they remain relatively constant in LINERs, indicating that star-forming activity can enhance carbon emission, especially for [C I] (2-1). We explore the correlations between the luminosities of CO (1-0) and [C I] lines, and find that LCO(1-0)' correlates tightly and almost linearly with both L[C I](1-0)' and L[C I](2-1)', suggesting that [C I] lines, similar to CO (1-0), can trace total molecular gas in H II, LINER, Seyfert, and starburst galaxies on kpc scales. We investigate the dependence of L[C I](1-0)'/LCO(1-0)', L[C I](2-1)'/LCO(1-0)' and [C I] excitation temperature, T-ex, on dust temperature, T-dust, and find noncorrelation and a weak and modest correlation, respectively. The ratio of L[C I](1-0)'/LCO(1-0)' stays a smooth distribution in most galaxies, indicating that the conversion factor of [C I] (1-0) luminosity to H-2 mass (X[CI](1-0)) changes with CO (1-0) conversion factor (alpha(CO)) proportionally. Under optically thin and local thermodynamical equilibrium assumptions, we derive a galaxy-wide average carbon excitation temperature of T-ex similar to 19.7 +/- 0.5 K, and an average neutral carbon abundance of X [CI]/X [H-2] similar to 2.5 +/- 1.0 x 10(-5) in our resolved sample, which is comparable to the usually adopted value of 3 x 10(-5), but similar to 3 times lower than the carbon abundance in local (ultra)luminous infrared galaxies. We conclude that the carbon abundance varies in different galaxy types.
Keywordgalaxies: spiral galaxies: starburst ISM: abundances ISM: atoms ISM: molecules
DOI10.3847/1538-4357/ab29ed
WOS KeywordATOMIC CARBON ; PHYSICAL CONDITIONS ; PHOTODISSOCIATION REGIONS ; INTERSTELLAR-MEDIUM ; INFRARED GALAXIES ; SPIRAL GALAXIES ; STAR-FORMATION ; STARBURST ; M82 ; CLOUDS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000478735500007
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27217
Collection中国科学院紫金山天文台
Corresponding AuthorJiao, Qian
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
4.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
5.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
6.CCJCA, Camino El Observ 1515, Santiago, Chile
7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
8.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China
9.Kwansei Gakuin Univ, Sch Sci & Technol, 2-1 Gakuen, Sanda, Hyogo 6691337, Japan
10.Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland
11.ESO, Karl Schwarzschild Str 2, D-85748 Munich, Germany
Recommended Citation
GB/T 7714
Jiao, Qian,Zhao, Yinghe,Lu, Nanyao,et al. Resolved Neutral Carbon Emission in Nearby Galaxies: [C I] Lines as Total Molecular Gas Tracers[J]. ASTROPHYSICAL JOURNAL,2019,880(2):11.
APA Jiao, Qian.,Zhao, Yinghe.,Lu, Nanyao.,Gao, Yu.,Salak, Dragan.,...&Tan, Qinghua.(2019).Resolved Neutral Carbon Emission in Nearby Galaxies: [C I] Lines as Total Molecular Gas Tracers.ASTROPHYSICAL JOURNAL,880(2),11.
MLA Jiao, Qian,et al."Resolved Neutral Carbon Emission in Nearby Galaxies: [C I] Lines as Total Molecular Gas Tracers".ASTROPHYSICAL JOURNAL 880.2(2019):11.
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