ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179**The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
文献类型：期刊论文
| 作者 | Zhao,Yinghe1,2,3 ; Lu,Nanyao4,5; Díaz-Santos,Tanio6; Xu,C. Kevin4,5; Gao,Yu7; Charmandaris,Vassilis8,9; Werf,Paul van der10; Zhang,Zhi-Yu11,12; Cao,Chen13,14
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2017-08-11 |
| 卷号 | 845期号:1 |
| 关键词 | galaxies: active galaxies: nuclei galaxies: ISM galaxies: starburst galaxies: evolution submillimeter: galaxies |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa7ff8 |
| 英文摘要 | Abstract We present our high-resolution (0.″15 × 0.″13, ～34 pc) observations of the CO?(6?5) line emission, which probes the warm and dense molecular gas, and the 434 μm 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 ?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 ～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-α equivalent width. Within the nuclear region (radius?～?300 pc) and with a resolution of ～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. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-845-1-AA7FF8 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23925]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; zhaoyinghe@ynao.ac.cn 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 |
| 推荐引用方式 GB/T 7714 | Zhao,Yinghe,Lu,Nanyao,Díaz-Santos,Tanio,et al. ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179**The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.[J]. The Astrophysical Journal,2017,845(1). |
| APA | Zhao,Yinghe.,Lu,Nanyao.,Díaz-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**The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc..The Astrophysical Journal,845(1). |
| MLA | Zhao,Yinghe,et al."ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179**The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.".The Astrophysical Journal 845.1(2017). |
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