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The Carbon-to-H-2, CO-to-H-2 conversion factors, and carbon abundance on kiloparsec scales in nearby galaxies
Jiao, Qian1; Gao, Yu1,2; Zhao YH(赵应和)3
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2021-06
卷号504期号:2页码:2360-2380
DOI10.1093/mnras/stab1035
产权排序第3完成单位
收录类别SCI ; EI
关键词ISM: abundances ISM: atoms ISM: molecules galaxies: ISM
摘要

Using the atomic carbon [CI](P-3(1) -> 3P(0)) and [CI](P-3(2) -> P-3(1)) emission {hereafter [Ci](1 - 0) and [Ci](2 - 1), respectively} maps observed with the HerschelSpaceObservatory, and CO(1 - 0), Hi, infrared and submm maps from literatures, we estimate the [CI]-to-H-2 and CO-to-H-2 conversion factors of alpha([CI](1 - 0)), alpha([CI](2 - 1)), and alpha(CO) at a linear resolution kpc scale for six nearby galaxies of M 51, M 83, NGC 3627, NGC 4736, NGC 5055, and NGC 6946. This is perhaps the first effort, to our knowledge, in calibrating both [CI]-to-H-2 conversion factors across the spiral disks at spatially resolved kpc scale though such studies have been discussed globally in galaxies near and far. In order to derive the conversion factors and achieve these calibrations, we adopt three different dust-to-gas ratio (DGR) assumptions that scale approximately with metallicity taken from precursory results. We find that for all DGR assumptions, the alpha([CI](1 - 0)), alpha([CI](2 - 1)), and alpha(CO) are mostly flat with galactocentric radii, whereas both alpha([CI](2 - 1)) and alpha(CO) show decrease in the inner regions of galaxies. And the central alpha(CO) and alpha([CI](2 - 1)) values are on average similar to 2.2 and 1.8 times lower than its galaxy averages. The obtained carbon abundances from different DGR assumptions show flat profiles with galactocentric radii, and the average carbon abundance of the galaxies is comparable to the usually adopted value of 3 x 10(-5). We find that both metallicity and infrared luminosity correlate moderately with the alpha(CO), whereas only weakly with either the alpha([CI](1 - 0)) or carbon abundance, and not at all with the alpha([CI](2 - 1)).

资助项目National Key Basic Research and Development Program of ChinaNational Basic Research Program of China[2017YFA0402704] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12003070] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12033004] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11861131007] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11673057] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH008] ; Special research Assistant project
项目资助者National Key Basic Research and Development Program of ChinaNational Basic Research Program of China[2017YFA0402704] ; National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[12003070, 12033004, 11861131007, 11673057] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJ-SSW-SLH008] ; Special research Assistant project
语种英语
学科领域天文学 ; 星系与宇宙学
学科门类理学 ; 理学::天文学
文章类型Article
出版者OXFORD UNIV PRESS
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS记录号WOS:000659453800055
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ALMA SPECTROSCOPIC SURVEY ; TO-GAS RATIO ; MULTIBAND IMAGING PHOTOMETER ; LUMINOUS INFRARED GALAXIES ; STAR-FORMING GALAXIES ; C-I LINES ; MOLECULAR GAS ; ATOMIC CARBON ; ABSOLUTE CALIBRATION ; INTERSTELLAR-MEDIUM
EI入藏号20221712014304
EI主题词Galaxies
EI分类号931.3 Atomic and Molecular Physics
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/24451
专题南方基地
通讯作者Jiao, Qian; Gao, Yu
作者单位1.Purple Mountain Observatory, Chinese Academy of Sciences (CAS), Nanjing 210023, China;
2.Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, China;
3.Yunnan Observatories, CAS, Kunming 650011, China
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GB/T 7714
Jiao, Qian,Gao, Yu,Zhao YH. The Carbon-to-H-2, CO-to-H-2 conversion factors, and carbon abundance on kiloparsec scales in nearby galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,504(2):2360-2380.
APA Jiao, Qian,Gao, Yu,&Zhao YH.(2021).The Carbon-to-H-2, CO-to-H-2 conversion factors, and carbon abundance on kiloparsec scales in nearby galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,504(2),2360-2380.
MLA Jiao, Qian,et al."The Carbon-to-H-2, CO-to-H-2 conversion factors, and carbon abundance on kiloparsec scales in nearby galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 504.2(2021):2360-2380.
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