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The MALATANG survey: dense gas and star formation from high-transition HCN and HCO+ maps of NGC 253
Jiang, Xue-Jian1,2; Greve, Thomas R.3,4; Gao, Yu1,2,5; Zhang, Zhi-Yu6; Tan, Qinghua1,2; de Grijs, Richard7,8,9; Ho, Luis C.10,11; Michalowski, Michal J.12; Currie, Malcolm J.13; Wilson, Christine D.14; Brinks, Elias15; Ao, Yiping1,2; Zhao, Yinghe16,17,18; He, Jinhua16,17,19,20; Harada, Nanase21; Yang, Chentao22; Jiao, Qian1,2; Chung, Aeree23; Lee, Bumhyun10,23; Smith, Matthew W. L.24; Liu, Daizhong25; Matsushita, Satoki21; Shi, Yong26; Imanishi, Masatoshi27; Rawlings, Mark G.28; Zhu, Ming29,30; Eden, David31; Davis, Timothy A.24; Li, Xiaohu32
2020-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume494Issue:1Pages:1276-1296
AbstractTo 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.
Corresponding AuthorJiang, Xue-Jian(x.jiang@eaobservatory.org)
KeywordISM: molecules galaxies: individual: NGC 253 galaxies: ISM galaxies: star formation submillimetre: ISM
DOI10.1093/mnras/staa794
Indexed BySCI ; SCI
Language英语
WOS KeywordMOLECULAR GAS ; NEARBY GALAXIES ; SPIRAL GALAXIES ; STARBURST ; TRACERS ; LUMINOSITY ; NUCLEUS ; NGC-253
Funding ProjectNational 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000535885900100
PublisherOXFORD UNIV PRESS
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Research Program of Frontier Sciences ; National Science Centre, Poland ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program ; NSFC ; Yunnan Province of China ; Ministry of Science and Technology (MOST) of Taiwan ; Chinese Academy of Sciences (CAS) ; Science and Technology Facilities Council of the United Kingdom
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3495
Collection射电天文研究室_天体化学研究团组
Corresponding AuthorJiang, Xue-Jian
Affiliation1.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Peoples R China
3.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
4.Tech Univ Denmark, Cosm Dawn Ctr DAWN, DK-2800 Lyngby, Denmark
5.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China
6.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
7.Macquarie Univ, Dept Phys & Astron, Balaclava Rd, Sydney, NSW 2109, Australia
8.Macquarie Univ, Ctr Astron Astrophys & Astrophoton, Balaclava Rd, Sydney, NSW 2109, Australia
9.Int Space Sci Inst Beijing, Beijing 100190, Peoples R China
10.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
11.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
12.Adam Mickiewicz Univ, Fac Phys, Astron Observ Inst, Ul Sloneczna 36, PL-60286 Poznan, Poland
13.Rutherford Appleton Lab, RAL Space, Harwell Campus, Didcot OX11 0QX, Oxon, England
14.McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
15.Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England
16.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
17.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
18.Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China
19.Chinese Acad Sci, CAS, South Amer Ctr Astron, Natl Astron Observ, Beijing 100101, Peoples R China
20.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile
21.Acad Sinica, Inst Astron & Astrophys, 11F,Astron Math Bldg,AS NTU 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan
22.European Southern Observ, Alonso Cordova 3107, Casilla 19001, Santiago De Chi, Chile
23.Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 03722, South Korea
24.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales
25.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
26.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China
27.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
28.East Asian Observ, 660 N Aohoko Pl, Hilo, HI 96720 USA
29.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
30.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China
31.Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
32.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
Recommended Citation
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.
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