Resolved Neutral Carbon Emission in Nearby Galaxies: [C I] Lines as Total Molecular Gas Tracers
文献类型：期刊论文
| 作者 | 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
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 880期号:2页码:11 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: spiral galaxies: starburst ISM: abundances ISM: atoms ISM: molecules |
| DOI | 10.3847/1538-4357/ab29ed |
| 通讯作者 | Jiao, Qian(jiaoqian@pino.ac.cn) |
| 英文摘要 | We 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. |
| WOS关键词 | ATOMIC CARBON ; PHYSICAL CONDITIONS ; PHOTODISSOCIATION REGIONS ; INTERSTELLAR-MEDIUM ; INFRARED GALAXIES ; SPIRAL GALAXIES ; STAR-FORMATION ; STARBURST ; M82 ; CLOUDS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000478735500007 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27216]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Jiao, Qian |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。