Spatial Variation of the Chemical Properties of Massive Star-forming Clumps
文献类型：期刊论文
| 作者 | Zhu,Chunhua5; Li,Qiang3,4; He,Yuxin2,3; Quan,Donghui1,3; Esimbek,Jarken2,3; Zhou,Jianjun2,3; Li,Mingyue4,5; Esimbek, Jarken ; Zhu, Chunhua; Quan, Donghui
|
| 刊名 | The Astrophysical Journal Supplement Series
 |
| 出版日期 | 2019-07-15 |
| 卷号 | 243期号:1 |
| 关键词 | ISM: kinematics and dynamics ISM: molecules radio lines: ISM stars: formation |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/ab2465 |
| 英文摘要 | Abstract We selected 90 massive star-forming clumps with strong N2H+(1?0), HCO+(1?0), HCN(1?0), and HNC(1?0) emission from the Millimetre Astronomy Legacy Team 90 GHz survey. We obtained Herschel data for all 90 sources and NRAO VLA Sky Survey data for 51 of them. We convolved and regridded all images to the same resolution and pixel size and derived the temperature, H2 column density, molecules’ abundances and abundance, and ratios of each pixel. Our analysis yields three main conclusions. First, the abundances of N2H+, HCO+, HCN, and HNC increase when the column density decreases and the temperature increases, with spatial variations in their abundances dominated by changes in the H2 column density. Second, the abundance ratios between N2H+, HCO+, HCN, and HNC also display systemic variations as a function of the column density due to the chemical properties of these molecules. Third, the sources associated with the 20 cm continuum emission can be classified into four types based on the behavior of the abundances of the four molecules considered here as a function of this emission. The variations of the first three types could also be attributed to the variation of the H2 column density. |
| 语种 | 英语 |
| WOS记录号 | IOP:0067-0049-243-1-AB2465 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/2814]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Li, Mingyue |
| 作者单位 | 1.Eastern Kentucky University, Richmond, KY 40475, USA 2.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China 3.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, People’s Republic of China; zhoujj@xao.ac.cn 4.University of the Chinese Academy of Sciences, Beijing 100080, People’s Republic of China 5.School of Physical Science and Technology, Xinjiang University, Urumqi, 830046, People’s Republic of China; limingyue@xao.ac.cn, chunhuazhu@sina.cn |
| 推荐引用方式 GB/T 7714 | Zhu,Chunhua,Li,Qiang,He,Yuxin,et al. Spatial Variation of the Chemical Properties of Massive Star-forming Clumps[J]. The Astrophysical Journal Supplement Series,2019,243(1). |
| APA | Zhu,Chunhua.,Li,Qiang.,He,Yuxin.,Quan,Donghui.,Esimbek,Jarken.,...&Li, Qiang.(2019).Spatial Variation of the Chemical Properties of Massive Star-forming Clumps.The Astrophysical Journal Supplement Series,243(1). |
| MLA | Zhu,Chunhua,et al."Spatial Variation of the Chemical Properties of Massive Star-forming Clumps".The Astrophysical Journal Supplement Series 243.1(2019). |
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