中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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; Zhao YH(赵应和)2,3; Lu, Nanyao4,5; Gao, Yu1; Salak, Dragan6; Zhu, Ming5; Zhang, Zhi-Yu7,8; Jiang, Xue-Jian1; Tan, Qinghua1
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
DOI10.3847/1538-4357/ab29ed
产权排序第2完成单位
文献子类Article
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.

学科主题天文学 ; 星系与宇宙学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词ATOMIC CARBON ; PHYSICAL CONDITIONS ; PHOTODISSOCIATION REGIONS ; INTERSTELLAR-MEDIUM ; INFRARED GALAXIES ; SPIRAL GALAXIES ; STAR-FORMATION ; STARBURST ; M82 ; CLOUDS
资助项目National Key Basic Research and Development Program of China[2017YFA0402704] ; National Natural Science Foundation of China (NSFC)[11673057] ; National Natural Science Foundation of China (NSFC)[11861131007] ; National Natural Science Foundation of China (NSFC)[11420101002] ; National Natural Science Foundation of China (NSFC)[U1531246] ; National Natural Science Foundation of China (NSFC)[11673028] ; National Natural Science Foundation of China (NSFC)[11603075] ; National Natural Science Foundation of China (NSFC)[11803090] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH008] ; Youth 1000-talent Program of Yunnan Province
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000478735500007
资助机构National Key Basic Research and Development Program of China[2017YFA0402704] ; National Natural Science Foundation of China (NSFC)[11673057, 11861131007, 11420101002, U1531246, 11673028, 11603075, 11803090] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH008] ; Youth 1000-talent Program of Yunnan Province
源URL[http://ir.ynao.ac.cn/handle/114a53/20842]  
专题云南天文台_丽江天文观测站(南方基地)
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Jiao, Qian
作者单位1.Purple Mountain Observatory & Key Lab of Radio Astronomy, Chinese Academy of Sciences (CAS), Nanjing 210008, People's Republic of China
2.Yunnan Observatories & Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650011, People's Republic of China
3.Center for Astronomical Mega-Science, CAS, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
4.China-Chile Joint Center for Astronomy (CCJCA), Camino El Observatorio 1515, Las Condes, Santiago, Chile
5.National Astronomical Observatories & Key Lab of Radio Astronomy, CAS, Beijing 100012, People's Republic of China
6.School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
7.Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
8.ESO, Karl Schwarzschild Strasse 2, D-85748 Garching, Munich, Germany
推荐引用方式
GB/T 7714
Jiao, Qian,Zhao YH,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 YH.,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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来源:云南天文台

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