ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179
文献类型：期刊论文
| 作者 | Zhao, Yinghe; Lu, Nanyao; Diaz-Santos, Tanio; Xu, C. Kevin; Gao, Yu; Charmandaris, Vassilis; van der Werf, Paul; Zhang, Zhi-Yu; Cao, Chen |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017 |
| 卷号 | 845期号:1页码:58- |
| 英文摘要 | 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. |
| 语种 | 英语 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/17405]  |
| 专题 | 中国科学院紫金山天文台 |
| 推荐引用方式 GB/T 7714 | Zhao, Yinghe,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):58-. |
| APA | Zhao, Yinghe.,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),58-. |
| MLA | Zhao, Yinghe,et al."ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179".ASTROPHYSICAL JOURNAL 845.1(2017):58-. |
入库方式： OAI收割
来源：紫金山天文台
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