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ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179
Zhao YH(赵应和)1,2,3; Lu, Nanyao4,5; Diaz-Santos, Tanio6; Xu, C. Kevin4,5; Gao, Yu7; Charmandaris, Vassilis8,9; van der Werf, Paul10; Zhang, Zhi-Yu11,12; Cao, Chen13,14
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Nuclei Galaxies: Ism Galaxies: Starburst Galaxies: Evolution Submillimeter: Galaxies

We present our high-resolution (0."15 x 0."13, similar to 34pc) observations of the CO (6-5) line emission, which probes the warm and dense molecular gas, and the 434 mu m dust continuum emission in the nuclear region of the starburst galaxy IC 5179, conducted with the Atacama Large Millimeter Array (ALMA). The CO. (6-5) emission is spatially distributed in filamentary structures with many dense cores and shows a velocity field that is characteristic of a circumnuclear rotating gas disk, with 90% of the rotation speed arising within a radius of less than or similar to 150 pc. At the scale of our spatial resolution, the CO. (6-5) and dust emission peaks do not always coincide, with their surface brightness ratio varying by a factor of similar to 10. This result suggests that their excitation mechanisms are likely different, as further evidenced by the southwest to northeast spatial gradient of both CO-to-dust continuum ratio and Pa-alpha equivalent width. Within the nuclear region (radius similar to 300 pc) and with a resolution of similar to 34 pc, the CO line flux (dust flux density) detected in our ALMA observations is 180 +/- 18 Jy km s(-1) (71 +/- 7 mJy), which accounts for 22% (2.4%) of the total value measured by Herschel.

Funding ProjectNSFC[11673057] ; NSFC[11420101002] ; NSFC[11673028] ; NSFC[11643003] ; NSFC[11503013] ; ALMA-CONICYT[31130005] ; FONDECYT[1151239] ; ERC[321302]
Funding OrganizationNSFC[11673057, 11420101002, 11673028, 11643003, 11503013] ; ALMA-CONICYT[31130005] ; FONDECYT[1151239] ; ERC[321302]
Subject Area天文学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
WOS IDWOS:000407462000017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLuminous Infrared Galaxies ; High-redshift Galaxies ; Sky Lirg Survey ; Star-formation ; Molecular Gas ; Nuclear Region ; Goals Sample ; Co Emission ; Ngc 1614 ; Arp 220
Citation statistics
Document Type期刊论文
Corresponding AuthorZhao YH(赵应和)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.Center for Astronomical Mega-Science, CAS, 20A Datun Road, Chaoyang District, Beijing 100012, China
4.National Astronomical Observatories of China, Chinese Academy of Sciences, Beijing 100012, China
5.China-Chile Joint Center for Astronomy, Chinese Academy of Sciences, Camino El Observatorio, 1515 Las Condes, Santiago, Chile
6.Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
7.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
8.Department of Physics, University of Crete, GR-71003 Heraklion, Greece
9.IAASARS, National Observatory of Athens, GR-15236, Penteli, Greece
10.Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
11.Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
12.11 ESO, Karl Schwarzschild Strasse 2, D-85748 Garching, Munich, Germany
13.School of Space Science and Physics, Shandong University at Weihai, Weihai, Shandong 264209, China
14.handong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Weihai, Shandong 264209, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao YH,Lu, Nanyao,Diaz-Santos, Tanio,et al. ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179[J]. ASTROPHYSICAL JOURNAL,2017,845(1).
APA Zhao YH.,Lu, Nanyao.,Diaz-Santos, Tanio.,Xu, C. Kevin.,Gao, Yu.,...&Cao, Chen.(2017).ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179.ASTROPHYSICAL JOURNAL,845(1).
MLA Zhao YH,et al."ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179".ASTROPHYSICAL JOURNAL 845.1(2017).
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