The MALATANG survey: dense gas and star formation from high-transition HCN and HCO+ maps of NGC 253
文献类型:期刊论文
作者 | Jiang, Xue-Jian2,3; Greve, Thomas R.4,5; Gao, Yu2,3,6; Zhang, Zhi-Yu7; Tan, Qinghua2,3; de Grijs, Richard8,9,10; Ho, Luis C.11,12; Michalowski, Michal J.13; Currie, Malcolm J.14; Wilson, Christine D.15 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2020-05-01 |
卷号 | 494期号:1页码:1276-1296 |
ISSN号 | 0035-8711 |
关键词 | ISM: molecules galaxies: individual: NGC 253 galaxies: ISM galaxies: star formation submillimetre: ISM |
DOI | 10.1093/mnras/staa794 |
英文摘要 | To study the high-transition dense-gas tracers and their relationships to the star formation of the inner similar to 2 kpc circumnuclear region of NGC 253, we present HCN J = 4-3 and HCO+ J = 4-3 maps obtained with the James Clerk Maxwell Telescope. Using the spatially resolved data, we compute the concentration indices r(90)/r(50) for the different tracers. HCN and HCO+ 4-3 emission features tend to be centrally concentrated, which is in contrast to the shallower distribution of CO 1-0 and the stellar component. The dense-gas fraction (f(dense), traced by v the velocity-integrated-intensity ratios of HCN/CO and HCO+/CO) and the ratio R-31 (CO 3-2 / 1 -0) decline towards larger galactocentric distances, but increase with higher star formation rate surface density. The radial variation and the large scatter of f(dense )- dense and R31 imply distinct physical conditions in different regions of the galactic disc. The relationships of f(dense) versus Sigma(stellar) and SFEdense versus Sigma(stellar) are explored. SFEdense increases with higher Sigma(stellar) in this galaxy, which is inconsistent with previous work that used HCN 1-0 data. This implies that existing stellar components might have different effects on the high-J HCN and HCO+ than their low-J emission. We also find that SFE(dense )seems to be decreasing with higher f(dense) which is consistent with previous works, and it suggests that the ability of the dense gas to form stars diminishes when the average density of the gas increases. This is expected in a scenario where only the regions with high-density contrast collapse and form stars. |
WOS关键词 | MOLECULAR GAS ; NEARBY GALAXIES ; SPIRAL GALAXIES ; STARBURST ; TRACERS ; LUMINOSITY ; NUCLEUS ; NGC-253 |
资助项目 | National Key R&D Program of China[2017YFA0402704] ; National Key R&D Program of China[2016YFA0400702] ; National Key R&D Program of China[2017YFA0402700] ; National Natural Science Foundation of China[11861131007] ; National Natural Science Foundation of China[11420101002] ; National Natural Science Foundation of China[11603075] ; National Natural Science Foundation of China[11721303] ; National Natural Science Foundation of China[U1731237] ; National Natural Science Foundation of China[11933011] ; National Natural Science Foundation of China[11673057] ; Chinese Academy of Sciences Key Research Program of Frontier Sciences[QYZDJSSW-SLH008] ; National Science Centre, Poland[2018/30/E/ST9/00208] ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program ; NSFC[11873086] ; NSFC[U1631237] ; Yunnan Province of China[2017HC018] ; Ministry of Science and Technology (MOST) of Taiwan[MOST 107-2119-M-001-020] ; Chinese Academy of Sciences (CAS) ; Science and Technology Facilities Council of the United Kingdom |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000535885900100 |
资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; National Science Centre, Poland ; National Science Centre, Poland ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program ; Canada Research Chairs program ; NSFC ; NSFC ; Yunnan Province of China ; Yunnan Province of China ; Ministry of Science and Technology (MOST) of Taiwan ; Ministry of Science and Technology (MOST) of Taiwan ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; National Science Centre, Poland ; National Science Centre, Poland ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program ; Canada Research Chairs program ; NSFC ; NSFC ; Yunnan Province of China ; Yunnan Province of China ; Ministry of Science and Technology (MOST) of Taiwan ; Ministry of Science and Technology (MOST) of Taiwan ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; National Science Centre, Poland ; National Science Centre, Poland ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program ; Canada Research Chairs program ; NSFC ; NSFC ; Yunnan Province of China ; Yunnan Province of China ; Ministry of Science and Technology (MOST) of Taiwan ; Ministry of Science and Technology (MOST) of Taiwan ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; National Science Centre, Poland ; National Science Centre, Poland ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program ; Canada Research Chairs program ; NSFC ; NSFC ; Yunnan Province of China ; Yunnan Province of China ; Ministry of Science and Technology (MOST) of Taiwan ; Ministry of Science and Technology (MOST) of Taiwan ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom |
源URL | [http://ir.bao.ac.cn/handle/114a11/54706] |
专题 | 中国科学院国家天文台 |
通讯作者 | Jiang, Xue-Jian |
作者单位 | 1.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Peoples R China 4.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England 5.Tech Univ Denmark, Cosm Dawn Ctr DAWN, DK-2800 Lyngby, Denmark 6.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 7.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 8.Macquarie Univ, Dept Phys & Astron, Balaclava Rd, Sydney, NSW 2109, Australia 9.Macquarie Univ, Ctr Astron Astrophys & Astrophoton, Balaclava Rd, Sydney, NSW 2109, Australia 10.Int Space Sci Inst Beijing, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Jiang, Xue-Jian,Greve, Thomas R.,Gao, Yu,et al. The MALATANG survey: dense gas and star formation from high-transition HCN and HCO+ maps of NGC 253[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,494(1):1276-1296. |
APA | Jiang, Xue-Jian.,Greve, Thomas R..,Gao, Yu.,Zhang, Zhi-Yu.,Tan, Qinghua.,...&Li, Xiaohu.(2020).The MALATANG survey: dense gas and star formation from high-transition HCN and HCO+ maps of NGC 253.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,494(1),1276-1296. |
MLA | Jiang, Xue-Jian,et al."The MALATANG survey: dense gas and star formation from high-transition HCN and HCO+ maps of NGC 253".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 494.1(2020):1276-1296. |
入库方式: OAI收割
来源:国家天文台
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